Bmp to 2D Array

Hello
I'm trying to convert an bmp-File into a 2-d array which should conatin the values of each pixel. I created this VI but it doesn't work. Could somebody tell me why not?
Thanks
Simon
PS: I succesfull created the opposite. A VI which creates a bmp out of a 2d array. Now I failed to do it vice versa :-(
Using Labview 7.1
Attachments:
2d Array ausBitmap.vi ‏20 KB
Bitmap aus 2d Array.vi ‏317 KB

You are writing a 24 bit pixmap, but then try to read a 8 bit pixmap. The two must match.
(You should also try to use the correct datatypes)
Message Edited by altenbach on 07-26-2006 10:05 AM
LabVIEW Champion . Do more with less code and in less time .

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Loading file of BMPs into one array

Hi,
For some reason I am having trouble loading a batch of BMP files into one 2D array. I have attached the VI I have been messing with for some time now... (as well as a couple sample BMPs if someone wants them)
I want to take each BMP in a folder, extract the 2D array and put it into one array. Each new image's 2D array goes on the row after the previous image.
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Go to Solution.
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I need to save a bmp file using an I16 grayscale picture.
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mimeTypes.rdf does not seem to allow this.

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<pre><nowiki><input type="file" name="file" accept="image/*,application/pdf" id="file" /></nowiki></pre>
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Deploying BMP Entity Bean with primary key calss

Hi,
I am using EJB 2.0 with and websphere studio 5.0 and database is sql server 2000.
My BMP Entity bean has a primary key class.From my client I am invoking the Entity Bean by calling it's findbyprimarykey method.
The home interface of my findbyprimarykey method returns a class of type Remote.But in the Entity Bean class,the return type is the primarykey class type.
My problem is invoking this findbyprimarykey from the client to get the remote interface so that the other business methods of the entity bean can be called.
The control goes into the ejbFindbyPrimaryKey but when it is returing from the Entity Bean class,it gives a remote exception (as the return type in Entity Bean class and Home interface are different for the findbyprimarykey method).
I think that somewhere in the deployment decriptor in my websphere,i have to specify the primarykey class type,which i am missing out and hence getting the error.
Please help me out with your advice and solution.
Thanks
Rahul Priyadarshi

Hi,
Sorry to disturb you again.
Even my code is also almost the same....i am pasting the code below...Please go through it and let me know if I have made any mistake..
EditVendorEntityBean.....(Bean Class)
package code.beans.EditVendor;
import code.beans.dataAccess.*;
import javax.ejb.CreateException;
import javax.ejb.RemoveException;
import javax.ejb.EntityBean;
import javax.ejb.EntityContext;
import javax.ejb.EJBException;
import javax.ejb.FinderException;
import javax.ejb.ObjectNotFoundException;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import java.sql.*;
import javax.sql.*;
import java.util.*;
* Bean implementation class for Enterprise Bean: EditVendorEntity
public class EditVendorEntityBean implements javax.ejb.EntityBean {
     private static Hashtable dataSources = new Hashtable();
     private String username;
private int Vendor_ID;
private int Category_Id;
private String Category_Name;
private String Vendor_Name;
private String Vendor_Address1;
private String Vendor_Address2;
private String Contact_Name;
private String Home_Phone;
private String Work_Phone;
private String email;
private String faxno;
private String userloginname;
private boolean dirtyFlag = false;
private EntityContext context;
private static final String DS_NAME = "jdbc/spiPOPS";
Connection con = null;
Statement stmt = null;
PreparedStatement st = null;
ResultSet res = null;
     //***********************Business Methods*********************
// Begin of Busines Methods
public void setData (String[] catname, String vendorname,String vendadd1,String vendadd2,String vendcontact,String venoff,String venres,String mailid,String venfax) {
          System.out.println("in setData where Vendor Id= "+ Vendor_ID);
               boolean status=false;
               boolean existing=false;
               ArrayList cat=new ArrayList();
               try
                    cat=getcategorylist(this.Vendor_ID);
               catch(SQLException e)
                    System.out.println("Could not get category list");
               System.out.println("Size of cat array -->" + cat.size() + " and string array size -->" + catname.length);
               if(catname.length>0)
                    //Removing unwanted vendor categories for a particular vendor id
                    for(int i=0;i<cat.size();i++)
                              existing=false;
                              String tempdata=(String)cat.get(i);
                              for(int j=0;j<catname.length;j++)
                                   if(tempdata.equals(catname[j]))
                                        existing=true;
                              if(!existing)
                                   try
                                        delvencat(this.Vendor_ID,tempdata.trim());
                                   catch(SQLException e)
                                        System.out.println("Could not delete record in POPS_VENDOR_CATEGORY for -->" + tempdata);
               //Adding new vendor categories for a particular vendor
                    try
                              for(int i=0;i<catname.length;i++)
                                   status=false;
                                   String strcat=catname;
                                   status=checkcat(this.Vendor_ID,strcat.trim());
                                   if(!status)
                                        insertvencat(this.Vendor_ID,strcat.trim());
                    catch(SQLException e)
                              System.out.println("Could not insert or select from POPS_VENDOR_CATEGORY table");
               this.Vendor_Name          =vendorname;
          this.Vendor_Address1     =vendadd1;
          this.Vendor_Address2     =vendadd2;
          this.Contact_Name          =vendcontact;
          this.Work_Phone               =venoff;
          this.Home_Phone               =venres;
          this.email                    =mailid;
          this.faxno                    =venfax;
               dirtyFlag = true;
               System.out.println("Leaving set data method");
public Vector getData() {
     Vector vctRec=new Vector();
     ArrayList arrdatas = new ArrayList();
     arrdatas.add(""+this.Vendor_ID);
     arrdatas.add(this.Vendor_Name);
     arrdatas.add(this.Vendor_Address1);
     arrdatas.add(this.Vendor_Address2);
     arrdatas.add(this.Contact_Name);
     arrdatas.add(this.Work_Phone);
     arrdatas.add(this.Home_Phone);
     arrdatas.add(this.email);
     arrdatas.add(this.faxno);
     vctRec.addElement(arrdatas);
     ArrayList cat=new ArrayList();
          try
          System.out.println("Calling getcategorylist from getdata with vendorid-->" + this.Vendor_ID);
          cat          = getcategorylist(this.Vendor_ID);
     catch(SQLException e)
               System.out.println("Could not get datas for category list");
     vctRec.addElement(cat);
     ArrayList allcats=new ArrayList();
     try
                    allcats          = getallcategorylist();
          catch(SQLException e)
                    System.out.println("Could not get datas for category list");
     vctRec.addElement(allcats);
          dirtyFlag = false;
     System.out.println("Before return statement in getdata with vector size -->" + vctRec.size());
          return vctRec;
// End of Business Methods
//**************************Entity Bean Methods*******************************
     * ejbActivate
     public void ejbActivate() {
          Vendor_ID = Integer.parseInt((String)context.getPrimaryKey());
     System.out.println("Inside ejbActivate Vendor_ID-->"+ Vendor_ID);
     * ejbLoad
     public void ejbLoad() {
          System.out.println("Inside ejbLoad ********" );
try {
loadRow();
}catch (Exception ex) {
          System.out.println("Failed in loadRow()");
throw new EJBException("ejbLoad: " +
ex.getMessage());
     * ejbPassivate
     public void ejbPassivate() {
     System.out.println("Inside ejbPassivate " );
Vendor_ID = 0;
     * ejbRemove
     public void ejbRemove() throws javax.ejb.RemoveException {
          //Empty Method
     * ejbStore
     public void ejbStore() {
System.out.println("Inside ejbStore " );
try {
storeRow();
}catch (Exception ex) {
          System.out.println("Exception thrown in storeRow" + ex.getMessage());
throw new EJBException("ejbLoad: " +
ex.getMessage());
     * getEntityContext
     public javax.ejb.EntityContext getEntityContext() {
          return context;
     * setEntityContext
     public void setEntityContext(javax.ejb.EntityContext ctx) {
          System.out.println("Inside setEntityContext " );
try{
     con = getConnection(DS_NAME);
     System.out.println("DB Connection Created!!");
catch(Exception e){
this.context = ctx;
     * unsetEntityContext
     public void unsetEntityContext() {
System.out.println("Inside unsetEntityContext " );
closeDbConnection(con, res, st);
this.context = null;
     * ejbCreate
     //code.beans.EditVendor.EditVendorEntityKey
     public code.beans.EditVendor.EditVendorEntityKey ejbCreate(String vendorid)
          throws javax.ejb.CreateException {
          return new EditVendorEntityKey(vendorid);
          //return null;
     * ejbPostCreate
     public void ejbPostCreate(String vendorid) throws javax.ejb.CreateException {
          //Empty
     * ejbFindByPrimaryKey
     //code.beans.EditVendor.EditVendorEntityKey
     public code.beans.EditVendor.EditVendorEntityKey ejbFindByPrimaryKey(
          code.beans.EditVendor.EditVendorEntityKey primaryKey)
          throws javax.ejb.FinderException {
try {
if(selectByPrimaryKey(Integer.parseInt(primaryKey.getVendorId()))) {
          System.out.println("Leaving the findbyprimarykey method from the entity bean");
     return primaryKey;
     //return null;
}else {
     throw new ObjectNotFoundException
     ("Row for id " + primaryKey + " not found.");
}catch (Exception ex) {
throw new EJBException("EXCEPTION IN ejbFindByPrimaryKey :- " + ex.getMessage());
     /*********************** Database Utility Routines *************************/
private boolean selectByPrimaryKey(int priKey)
throws SQLException {
     System.out.println("inside selectByPrimaryKey for primary key " + priKey);
String queryStr ="SELECT VENDOR_ID FROM POPS_VENDOR WHERE VENDOR_ID = " + priKey;
System.out.println("in selectByPrimaryKey where queryString is: "+ queryStr);
          stmt = con.createStatement();
ResultSet result = stmt.executeQuery(queryStr);
if(!result.next()) {
stmt.close();
     System.out.println("Did not find "+priKey);
return false;
else { //Found the primaryKey
Vendor_ID = result.getInt("VENDOR_ID");
stmt.close();
return true;
private void loadRow() throws SQLException {
          System.out.println("inside loadRow ...");
          stmt = con.createStatement();
          String queryStr = "SELECT VENDOR_NAME,VENDOR_ADDRESS1,VENDOR_ADDRESS2,CONTACT_NAME,HOME_PHONE,WORK_PHONE,EMAIL_ID,FAX_NO " +
                              "FROM POPS_VENDOR WHERE VENDOR_ID=" + Vendor_ID;
          System.out.println("Inside loadRow()***********"+queryStr);
          ResultSet result = stmt.executeQuery(queryStr);
          ArrayList catadatas=new ArrayList();
     if(!result.next())
     throw new SQLException("No record for primary key" + Vendor_ID);
          this.Vendor_ID               =Vendor_ID;
                    this.Vendor_Name          =result.getString("VENDOR_NAME");
                    this.Vendor_Address1     =result.getString("VENDOR_ADDRESS1");
                    this.Vendor_Address2     =result.getString("VENDOR_ADDRESS2");
                    this.Contact_Name          =result.getString("CONTACT_NAME");
                    this.Home_Phone               =result.getString("HOME_PHONE");
                    this.Work_Phone               =result.getString("WORK_PHONE");
                    this.email                    =result.getString("EMAIL_ID");
                    this.faxno                    =result.getString("FAX_NO");
                         System.out.println("Leaving loadrow method with loaded datas for vendor -->" + Vendor_ID);
                         stmt.close();
private ArrayList getcategorylist(int vendor) throws SQLException{
          String queryStr ="SELECT DISTINCT(VENDOR_CAT) FROM POPS_VENDOR_CATEGORY WHERE VENDOR_ID=" + vendor;
          System.out.println("Query for the cat list --> " + queryStr);
          stmt = con.createStatement();
          ResultSet result = stmt.executeQuery(queryStr);
          ArrayList catdatas=new ArrayList();
try{
               while(result.next())
                    catdatas.add(result.getString("VENDOR_CAT"));
          catch (SQLException e){
               stmt.close();
               System.out.println("Could not retrieve datas for Category list");
          stmt.close();
          System.out.println("size off array for cat -->" + catdatas.size() + " and datas ->" + catdatas);
          return catdatas;
     private ArrayList getallcategorylist() throws SQLException{
               //String queryStr ="SELECT DISTINCT(VENDOR_CAT) FROM POPS_VENDOR_CATEGORY";
               StringBuffer strquery=new StringBuffer(20);
               strquery.append("SELECT DISTINCT(CATEGORY_NAME) FROM POPS_CATEGORY");
               stmt = con.createStatement();
               //ResultSet result = stmt.executeQuery(queryStr);
               ResultSet result = stmt.executeQuery(strquery.toString());
               ArrayList catdatas=new ArrayList();
               try{
                    while(result.next())
                              //catdatas.add(result.getString("VENDOR_CAT"));
                              catdatas.add(result.getString("CATEGORY_NAME"));
               catch (SQLException e){
                         stmt.close();
                         System.out.println("Could not retrieve datas for All Category list");
               stmt.close();
               return catdatas;
     private void delvencat(int vendor,String vencat) throws SQLException {
          int update=-1;
          stmt = con.createStatement();
          String queryStr ="DELETE FROM POPS_VENDOR_CATEGORY WHERE VENDOR_ID = " + vendor + " AND VENDOR_CAT = '" + vencat.toUpperCase() + "'";
          System.out.println("Delete query --> " + queryStr);
          update= stmt.executeUpdate(queryStr);
          if(update!=1)
               System.out.println("Did not find data to delete");
          stmt.close();
     private void insertvencat(int vendor,String vencat) throws SQLException {
          int update=-1;
          String queryStr ="INSERT INTO POPS_VENDOR_CATEGORY(VENDOR_ID,VENDOR_CAT)" +
                              " VALUES(" + vendor +",'" + vencat + "')";
          System.out.println("Insert query --> " + queryStr);
          stmt = con.createStatement();
          update=stmt.executeUpdate(queryStr);
          if(update!=1)
               System.out.println("Could not insert records in the database");
          stmt.close();
     private boolean checkcat(int vendor,String catven) throws SQLException {
          boolean datastatus=false;
          String queryStr ="SELECT VENDOR_ID FROM POPS_VENDOR_CATEGORY WHERE VENDOR_ID = " + vendor + " AND VENDOR_CAT = '" + catven.toUpperCase() + "'";
          stmt = con.createStatement();
          ResultSet result = stmt.executeQuery(queryStr);
          datastatus=result.next();
          stmt.close();
          return datastatus;
private void storeRow() throws SQLException {
               System.out.println("Inside ejb store");
     if (!dirtyFlag) {
     System.out.println("Skipping the UPDATE because object is not dirty");
     return;
     CallableStatement cs=null;
try{
                    cs = con.prepareCall("EXEC POPS_VENDOR_UPDATE " + this.Vendor_ID + ",'" + this.Vendor_Name + "','" + this.Vendor_Address1 + "','" + this.Vendor_Address2 + "','" + this.Contact_Name + "','" + this.Work_Phone + "','" + this.Home_Phone + "','" + this.email + "','" + this.faxno +"'");
                    System.out.println("\n\n SQL Statement : \n " + "EXEC POPS_VENDOR_UPDATE " + this.Vendor_ID + ",'" + this.Vendor_Name + "','" + this.Vendor_Address1 + "','" + this.Vendor_Address2 + "','" + this.Contact_Name + "','" + this.Work_Phone + "','" + this.Home_Phone + "','" + this.email + "','" + this.faxno +"'");
                    cs.executeUpdate();
          catch (SQLException e){
                    cs.close();
                    System.out.     println("\n\n Error in calling stored procedure POPS_INSERT_NEW_REQUEST \n\n"+ e.getMessage() + "\n\n");
          cs.close();
          dirtyFlag = false;
     private Connection getConnection(String dbName) throws SQLException
          String configuredDataSourceName = null;
          if (dbName == null) {
               System.out.println("Attemp to get connection failed. The requested database name is null");
          DataSource dbSource = getDataSource(dbName);
          return dbSource.getConnection();
     private DataSource getDataSource(String dbName)
          // looking from cache;
          DataSource dbSource = (DataSource) dataSources.get(dbName);
          if (dbSource == null) { //we need to find it from JNDI
               try {
                    Context ic = new InitialContext();
                    dbSource = (DataSource) ic.lookup(dbName);
                    dataSources.put(dbName, dbSource);
               }catch (NamingException e){
          return dbSource;
     * User calls this function to safely close an connection
     * @param connt The connection a datasource
     * @param rs The resulSet inside this connection
     * @param statement The statement associate with this connection
     private void closeDbConnection(Connection cont,ResultSet rs,Statement statement)
          if (rs != null)
          try {
                    rs.close();
               } catch (SQLException ignored) {
                    ignored.printStackTrace();
          if (statement != null)
               try {
                    statement.close();
               } catch (SQLException ignored) {
                    ignored.printStackTrace();
          if (cont != null)
               try {
                    cont.close();
               } catch (SQLException ignored) {
                    ignored.printStackTrace();
     } //closeDbConnection
EditVendorEntity (Remote Interface)
package code.beans.EditVendor;
import javax.ejb.EJBObject;
import java.rmi.RemoteException;
import java.util.*;
* Remote interface for Enterprise Bean: EditVendorEntity
public interface EditVendorEntity extends javax.ejb.EJBObject {
     public void setData (String[] catname, String vendorname,String vendadd1,String vendadd2,String vendcontact,String venoff,String venres,String mailid,String venfax)
               throws RemoteException;
public Vector getData() throws RemoteException;
EditVendorEntityHome (Home Interface)
package code.beans.EditVendor;
import java.rmi.RemoteException;
import javax.ejb.CreateException;
import javax.ejb.FinderException;
import javax.ejb.DuplicateKeyException;
import javax.ejb.EJBHome;
import java.util.*;
* Home interface for Enterprise Bean: EditVendorEntity
public interface EditVendorEntityHome extends javax.ejb.EJBHome {
     * Creates an instance from a key for Entity Bean: EditVendorEntity
     public code.beans.EditVendor.EditVendorEntity create(String vendorid)
          throws javax.ejb.CreateException, java.rmi.RemoteException;
     * Finds an instance using a key for Entity Bean: EditVendorEntity
     public code.beans.EditVendor.EditVendorEntity findByPrimaryKey(
          code.beans.EditVendor.EditVendorEntityKey Vendor_ID)
          throws javax.ejb.FinderException, java.rmi.RemoteException;
EditVendorEntityKey (Primary Key Class)
package code.beans.EditVendor;
* Key class for Entity Bean: EditVendorEntity
public class EditVendorEntityKey implements java.io.Serializable {
     static final long serialVersionUID = 3206093459760846163L;
     public String primkey;
     * Creates an empty key for Entity Bean: EditVendorEntity
     public EditVendorEntityKey() { }
     public EditVendorEntityKey(String primarykey) {
          this.primkey=primarykey;
     public String getVendorId() {
return primkey;
     * Returns true if both keys are equal.
     public boolean equals(java.lang.Object otherKey) {
          if (otherKey instanceof code.beans.EditVendor.EditVendorEntityKey) {
               code.beans.EditVendor.EditVendorEntityKey o =
                    (code.beans.EditVendor.EditVendorEntityKey) otherKey;
               return (primkey.equals(otherKey));
          return false;
     * Returns the hash code for the key.
     public int hashCode() {
          return (primkey.hashCode());
Please go through and give me your comments and solution...
Thanks in advance
Rahul

I want to use Get Panel Image in Labview 5.0.1 and need details on how to save the BMP data generated

I am trying to generate an application that saves a copy of its front panel on completion. This is easy to do using an invoke node with Print VI to HTML but this does not work in an .exe format. I have seen elsewhere that you have to use the Get Panel Image method, but no details are supplied in LV 5.0.1 documentation of how to use the "image" data (1-D Unsigned Byte array) that is generated. I want to save this in a format that can then be read as a bitmap in any standard graphics package. Any assistance?

Hi,
If you'd upgrade to LV5.1 or 6 you could use the 'standard' vi's for this.
You need a VI called "Write BMP File.vi". It's not shipped with LV5.0.1.
This vi only uses 3 subVI's, so perhaps someone at NI can convert it and
send it to you (sorry, I won't, it's copywrited).
If you cannot get this VI anywhere, you'll need to figure out the BMP file
format yourself. It's not too complicated, but still could take some days.
Perhaps someone figured it out before LV5.1 was released.
Regards,
Wiebe.
"RDK" wrote in message
news:[email protected]..
> I want to use Get Panel Image in Labview 5.0.1 and need details on how
> to save the BMP data generated
>
> I am trying to generate an application that saves a copy
of its front
> panel on completion. This is easy to do using an invoke node with
> Print VI to HTML but this does not work in an .exe format. I have seen
> elsewhere that you have to use the Get Panel Image method, but no
> details are supplied in LV 5.0.1 documentation of how to use the
> "image" data (1-D Unsigned Byte array) that is generated. I want to
> save this in a format that can then be read as a bitmap in any
> standard graphics package. Any assistance?

How do I insert into an array only if the condition is true?

I am buiding an array made up of pairs of data from a file. I am going through line by line putting the values in an array and then taking the pairs of two indexes oring them and putting the number into another array. I do not know if there is more than one set on each line so I have to do a while loop to check.The problem is I have to get the indexes in pairs, so for example I take in the element from index 0 and 1 and or them index 2 and 3 and or them, I do not need the combination of 1 and 2 or 3 and 4 and etc. I am using the "Quotient & Remainder" to check if the index is even or odd, if it is even I take that element and the very next index's element, I or them and put them in another array, but if i
t is odd I do not want to put anything into the array. How can I go about doing that? Any help would be appreciated. I am using version 6.1 Thanks, Molly
Attachments:
labview.bmp ‏3841 KB

Molly,
Rather than running while loop which only executes code every other time you could instead just do a little more math to get your index values. Just multiply the iterator (i) terminal by 2 for the first index and then add 1 to it for the second (you'd need to run the loop half as many times of course). This would be more efficient and easier to read in your code. One other tip is that when you are running a loop a specified number of times it's cleaner to use a for loop rather than a while loop.
Regards,
Ryan K.
NI

Setting attributes of image stored in byte array in servlet

Hi,
I am using a servlet to stream image (GIF) to the browser.
Image is accessed by browser using the img tag. src attribute points to the servlet which send the image stream.
Servlet has the image as the array of bytes. It simply write these bytes on the response object's output stream. It does not use any encoder.
I get the image on the browser. But when I try to see the properties of the image I don't see the type of image. I also don't see the created time, modified time and size of the image. When I do Save As on this image it tries to save it as BMP instead of GIF. Also when I do the print preview I don't see the image in the preview window. When I try to print the web page, it prints everything except this image. I get small cross(image missing) on the printed page.
I would like to know why the image attributes on browser go missing and why can't I print the image?
I would like to add that I am getting the image as the array of bytes from a different application on which I do not have control.
Thanks.

Hi,
I am using a servlet to stream image (GIF) to the browser.
Image is accessed by browser using the img tag. src attribute points to the servlet which send the image stream.
Servlet has the image as the array of bytes. It simply write these bytes on the response object's output stream. It does not use any encoder.
I get the image on the browser. But when I try to see the properties of the image I don't see the type of image. I also don't see the created time, modified time and size of the image. When I do Save As on this image it tries to save it as BMP instead of GIF. Also when I do the print preview I don't see the image in the preview window. When I try to print the web page, it prints everything except this image. I get small cross(image missing) on the printed page.
I would like to know why the image attributes on browser go missing and why can't I print the image?
I would like to add that I am getting the image as the array of bytes from a different application on which I do not have control.
Thanks.

Problem in reading BMP file .....

I've facing some inconsistency in reading BMP headers. There are two of them, and I've outlined them below....
Here's a description of the BMP headers, just for refreshing ....
1.
     typedef struct {
     BITMAPFILEHEADER bmfHeader;
     BITMAPINFOHEADER bmiHeader;
     GLubyte *image_data;
     } BITMAP_IMAGE;
     typedef struct tagBITMAPFILEHEADER {
          WORD bfType;               // 2B
          DWORD bfSize;               // 4B
          WORD bfReserved1;     // 2B
          WORD bfReserved2;     // 2B
          DWORD bfOffBits;          // 4B
     } BITMAPFILEHEADER, *PBITMAPFILEHEADER;
     typedef struct tagBITMAPINFOHEADER{
     DWORD biSize;
     LONG biWidth;
     LONG biHeight;
     WORD biPlanes;
     WORD biBitCount;
     DWORD biCompression;
     DWORD biSizeImage;
     LONG biXPelsPerMeter;
     LONG biYPelsPerMeter;
     DWORD biClrUsed;
     DWORD biClrImportant;
     } BITMAPINFOHEADER, *PBITMAPINFOHEADER;
2. The file I'm reading test2.bmp has the following parameters
     File Type                     Windows 3.x Bitmap (BMP)
     Width                         4
     Height                         4
     Horizontal Resolution     96
     Vertical Resolution          96
     Bit Depth                    24
     Color Representation     True Color RGB
     Compression                    (uncompressed)
     Size                         102 bytes
     Size on disk               4.00 KB (4,096 bytes)
3. Output of the program is....
          File Headers are...
          bfType :424d
          bfSize :102
          bfReserved1 :0
          bfReserved2 :0
          bfOffBits :54
          File Info Headers are...
          biSize :40
          biWidth :4
          biHeight :4
          biPlanes :0
          biBitCount :1
          biCompression :1572864
          biSizeImage :48
          biXPelsPerMeter :196
          biYPelsPerMeter :234881220
          biClrUsed :234881024
          biClrImportant :0
4.      readInt()     4
          Reads four input bytes and returns an int value.
     readUnsignedShort()     2
          Reads two input bytes and returns an int value in the range 0 through 65535.
     readByte()
          Reads one Byte
5. The bfType fields value should be 'BM' whose Hex is 0x4D42 according to this link
http://edais.earlsoft.co.uk/Tutorials/Programming/Bitmaps/BMPch1.html
But the Hex I get is 424d.How come ?
6. When reading bfSize (see ## ), we should read 4 bytes as per the above structure. But I don't
get the answer of 102 when I do readInt() (which reads 4B). On the contrary, when I do
readByte(), thats when I the right file size of 102.
Why ?
Rest all the output look ok.
import java.io.*;
class BMPReader{
     private byte data[];
     private DataInputStream dis = null;
     public BMPReader(String fileName){
          readFile(fileName);
     private void readFile(String fileName){
          try{
               dis = new DataInputStream(new FileInputStream(new File(fileName)));
          catch(Exception e){
               System.out.println(e);
     public void printFileHeader(){
          System.out.println("File Headers are...");
          try{
               // converting the 2 bytes read to Hex
               System.out.println("bfType :" + Integer.toString(dis.readUnsignedShort(),16));
               System.out.println("bfSize :" + dis.readInt());
               //System.out.println("bfSize :" + dis.readByte());// ## identifier, should read 4B here instead of 1B
               System.out.println("bfReserved1 :" + dis.readUnsignedShort());     // bfReserved1
               System.out.println("bfReserved2 :" + dis.readUnsignedShort());     // bfReserved2
               System.out.println("bfOffBits      :" + dis.readInt());               // bfOffBits
          catch(Exception e){
               System.out.println(e.toString());
     public void printFileInfoHeader(){
          System.out.println();
          System.out.println("File Info Headers are...");
          try{
               System.out.println("biSize           :" + dis.readInt());                         //DWORD
               System.out.println("biWidth      :" + dis.readInt());                     //LONG
               System.out.println("biHeight      :" + dis.readInt());                     //LONG
               System.out.println("biPlanes      :" + dis.readUnsignedShort());          //WORD
               System.out.println("biBitCount      :" + dis.readUnsignedShort());     //WORD
               System.out.println("biCompression     :" + dis.readInt());               //DWORD
               System.out.println("biSizeImage      :" + dis.readInt());               //DWORD
               System.out.println("biXPelsPerMeter :" + dis.readInt());          //LONG
               System.out.println("biYPelsPerMeter :" + dis.readInt());          //LONG
               System.out.println("biClrUsed          :" + dis.readInt());                    //DWORD
               System.out.println("biClrImportant      :" + dis.readInt());               //DWORD
          catch(Exception e){
               System.out.println(e.toString());
public class BMPReadForum{
     public static void main(String args[]){
          String fName = "test2.bmp";
          BMPReader bmpReader = new BMPReader(fName);
          bmpReader.printFileHeader();
          bmpReader.printFileInfoHeader();
}

I stumbled across this thread while messing with numbers coming out of my palm (via pilot-xfer) that are unsigned 32 bit values read into a 4 element byte array. I would very much like to turn these things into longs. I looked over the above posted code (for which I am most grateful) and made some alterations that seemed prudent, would someone be so kind as to verify that this is doing what I would like it to do?
private long makeUInt(byte[] b) {
    // Convert a four byte array into an unsigned
    // int value. Created to handle converting
    // binary data in files to DWORDs, or
    // unsigned ints.
    long result = 0;
    int bit;
    int n = 0;    // I assumed this was the power to take the base to - 0 for lsb
    // I further assumed that we need to move backwards through this array,
    // as LSB is in the largest index, is this right?
    for (int a=3; a >= 0; a--) {
        // Similarly, I need to step through this backwards, for the same
        // reason
        for (int i=7; i >= 0; i--) {
            bit = b[a] & 1;
            result += bit * Math.pow(2, n++);
            b[a] >>>= 1;
    return result;
}So, as you see - I assumed the "n" term was a count for what power of 2 we were in in the bit string, and I further assumed that, since for me the MSB is in the byte array element with the largest index, I needed to work backwards through this thing.
Does this seem reasonable?
Thanks a lot
Lee

How do I initialize an array after getting xml data via httpservice?

I am having a problem trying to initialize an array with data from an external xml file obtained via httpservice. Any help/direction would be much appreciated. I am using Flex 4 (Flash Builder 4).
Here is my xml file (partial):
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Root>
    <Row>
        <icdcodedanddesc>00 PROCEDURES AND INTERVENT</icdcodedanddesc>
    </Row>
    <Row>
        <icdcodedanddesc>00.0 THERAPEUTIC ULTRASOUND</icdcodedanddesc>
    </Row>
    <Row>
        <icdcodedanddesc>00.01 THERAPEUTIC US VESSELS H</icdcodedanddesc>
    </Row>
    <Row>
        <icdcodedanddesc>00.02 THERAPEUTIC ULTRASOUND O</icdcodedanddesc>
    </Row>
</Root>
Here is my http service call:
<s:HTTPService id="icdcodeservice" url="ICD9V2MergeNumAndDescNotAllCodes.xml"
                       result="icdcodesService_resultHandler(event)" showBusyCursor="true" />
(I have tried resultFormat using object, array, xml).
I am using this following Tour de Flex example as the base -http://www.adobe.com/devnet-archive/flex/tourdeflex/web/#docIndex=0;illustIndex=1;sampleId =70500
and updating it with the httpservice call and result handler. But I cannot get the data to appear - I get [object Object] instead. In my result handler code I use "icdcodesar = new Array(event.result.Root.Row);" and then "icdcodesar.refresh();".
The key question is: How to I get data from an external xml file into an array without getting [object Object] when referencing the array entries. Thanks much!
(Tour de Flex example at http://www.adobe.com/devnet-archive/flex/tourdeflex/web/#docIndex=0;illustIndex=1;sampleId =70500 follows)
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
               xmlns:s="library://ns.adobe.com/flex/spark"
               xmlns:mx="library://ns.adobe.com/flex/mx"
               xmlns:local="*"
               skinClass="TDFGradientBackgroundSkin"
               viewSourceURL="srcview/index.html">
    <fx:Style>
        @namespace s "library://ns.adobe.com/flex/spark";
        @namespace mx "library://ns.adobe.com/flex/mx";
        @namespace local "*";
        s|Label {
            color: #000000;
    </fx:Style>
    <fx:Script>
        <![CDATA[
            import mx.collections.ArrayCollection;
            private var names:ArrayCollection = new ArrayCollection(
                ["John Smith", "Jane Doe", "Paul Dupont", "Liz Jones", "Marie Taylor"]);
            private function searchName(item:Object):Boolean
                return item.toLowerCase().search(searchBox.text) != -1;
            private function textChangeHandler():void
                names.filterFunction = searchName;
                names.refresh();
                searchBox.dataProvider = names;
            private function itemSelectedHandler(event:SearchBoxEvent):void
                fullName.text = event.item as String;
        ]]>
    </fx:Script>
    <s:layout>
        <s:HorizontalLayout verticalAlign="middle" horizontalAlign="center" />
    </s:layout>
    <s:Panel title="Components Samples"
             width="600" height="100%"
             color="0x000000"
             borderAlpha="0.15">
        <s:layout>
            <s:HorizontalLayout horizontalAlign="center"
                                paddingLeft="10" paddingRight="10"
                                paddingTop="10" paddingBottom="10"/>
        </s:layout>
        <s:HGroup >
            <s:Label text="Type a few characters to search:" />
            <local:SearchBox id="searchBox" textChange="textChangeHandler()" itemSelected="itemSelectedHandler(event)"/>
        </s:HGroup>
        <mx:FormItem label="You selected:" >
            <s:TextInput id="fullName"/>
        </mx:FormItem>
    </s:Panel>
</s:Application>

Hello,
Instead of extracting the first zero element from the vid array, you should take that out and connect it allone.
Attachments:
init.bmp ‏339 KB

Import an image to black&white into array

Hello there.
I'm making a type of cutter, that cuts stamps out of potatos. Currently, the pattern is an array of booleans of 25x25, where you have to click what you want to see and then the program cuts it out. We'd like to add more functionality though, perhaps by allowing images to be imported and these should then get put in the array, according to black/white-scale.
I have absolutly no idea how I'd start doing anything like this.
Thanks in advance!

Hi,
You should use the File Dialog VI. Provide it with a promt name (appears in the windows bar). pattern label (image type name), file patern (extention like *.bmp or *.jpg) and a start path (folder you would like to start in). You will now get a popup which starts in the folder you provided and limits to the extention you provided. Se VI attached (LV 2011) for an example.
What falkpl ment with VDM is Vision Development Module. This is an addon which you can install onto LabVIEW. It gives you a large library of VIsion functions to work on your images. For more info goto:
Vision Development Module
NI IMAQ is a driver for our Frame Grabbers to capture images from cameras.
Hope this helps. Have a nice day
Rik Prins, CLD
Applications Engineering Specialist Northern Europe, National Instruments
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Attachments:
Select file.vi ‏24 KB

Bmp to 2D Array

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