How to create an array (or matrix) from an 2d image?

Hello,
I begin to work on an application that process images, and see that first step is to transform the image into a matrix...I am blocked...
Could you please give yours opinions?
Any kind of help is highly appreciated...
Catalin

here you go:
BufferedImage img = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB);
int[] alphaData = ((DataBufferInt) ((BufferedImage) img).getRaster().getDataBuffer()).getData();
each pixel is a int in the array with following byte-order: ARGB
lg Clemens

Similar Messages

Creating an arrays of objects from a class

I was wondering does any one know how to create an array of objects from a class?
I am trying to create an array of objects of a class.
class name ---> Class objectArray[100] = new Class;
I cant seem to make a single class but i need to figure out how to create an array of objects.
I can make a normal class with Class object = new Class

There are four lines of code in your for-loop that actually do something:
for(index = 0; index < rooms.length; index++) {
/*1*/ assignWidth.setWidth(Double.parseDouble(in.readLine()));
/*2*/ rooms[index] = assignWidth;
/*3*/ assignLength.setWidth(Double.parseDouble(in.readLine());
/*4*/ rooms[index] = assignLength;
}1.) Sets the width of an object, that has been instantiated outside the loop.
2.) assigns that object to the current position in the array
3.) Sets the width of a second object that has been instantiated outside the loop
4.) assigns that other object to the current position in the array
btw.: I bet you meant "assignLength.setLength(Double.parseDouble(in.readLine());" in line 3 ;)
Since each position in an array can only hold one value, the first assignment (line 2) is overwritten by the second assignment (line 4)
When I said "construct a new room-object and assign it to rooms[index]" I meant something like this:
for(index = 0; index < rooms.length; index++) {
    Room aNewRoom = new Room();
    aNewRoom.setWidth(Double.parseDouble(in.readLine()));
    aNewRoom.setLength(Double.parseDouble(in.readLine());
    rooms[index] = aNewRoom;
}1.) Constructs a new Object in every iteration of the for-loop. (btw: I don't know what kind of objects you're using, so this needs most likely modification!!)
2.) set the width of the newly created object
3.) set the length of the newly created object
4.) assign the newly created object to the current position in the array
-T-
btw. this would do the same:
for(index = 0; index < rooms.length; index++) {
    rooms[index] = new Room();
    rooms[index].setWidth(Double.parseDouble(in.readLine()));
    rooms[index].setLength(Double.parseDouble(in.readLine());
}but be sure you understand it. Your teacher most likely wants you to explain it ;)

How to create an array variable

Hi folks,
I'm developing a flowN activity , for each branch created, I need to pass different values (values I get from DB).
For this my plan would be,
-create an array variable , load all the values(from DB) into the array
-pass the array to each branch in flowN activity based on the index
As I'm newbie to BPEL, I do not know how to create an array variable.
Could you people guide me please.
Regards
Viki

Hi,
I created my string array like
<element name="string_array">
<complexType>
<sequence>
<element name="input" type="string" minOccurs="0" maxOccurs="unbounded"/>
</sequence>
</complexType>
</element>
<variable name="arr" element="client:string_array"/>
I am able to add values to my array variable named as "arr"
When I use the following code snippet, it gives my the value of the entire list.
<%ora:getNodeValue(bpws:getVariableData('arr'))%>
But when I try retireve values one by one like <%ora:getElement('arr','/client:string_array/client:input',[0])%>, its giving me error.
Guide to get throu' this.
Viki

How to create a group of contact from a multi-selection of mails in a mailbox to answer to all senders?

How to create a group of contact from a multi-selection of mails in a mailbox to answer to all senders?

Use Mail Scripts. Its Add Addresses function will collect all the addresses from all selected messages and allow you to select the ones you want to add and allow you to create groups as you go.

How to create automatic creation of BP from customer and vendor master data

Hi gurus,
can any one tell how to create automatic creation of BP from customer and vendor master data.
Please give me the steps.
Thanks
Sasikanth.

HI,
Goto SPRO\ Cross application components \ Master data synchronization \ Synchronization control.
Assign account groups of customer and vendors to respective BP grouping. This setting is enough to create BP in background while creating customer / vendor. But the fields groups are very much important, ensure mandatory fields should be sync.
rgds,
Srini

How to create a interface with NTR from SAP XI?

How to create a interface with NTR from SAP XI?

Hi,
What do you mean by NTR ?...
What are the details you needed...Please be clear and more elaborative as far as possible..so that you will get straight forward answers...
HTH
Rajesh

How to create an array using reflection.

How to create an array using reflection.
I want to achive something like this,Object o;
o = (Object)(new TestClass[10]);but by use of reflection.
To create a single object is simple:Object o;
o = Class.forName("TestClass").newInstance();But how do I create an array of objects, when the class of objects is known only by name? (Can't use Object[] because even though an Object[] array can be filled with "TestClass" elements only, it Cannot be casted to a TestClass[] array)
Anybody knows?":-)
Ragnvald Barth
Software enigneer

Found it!
the java.lang.reflect.Array class solves it!
Yes !!!

How to create an array of linklists??? ... plz

Hi guys,
I am trying to create a Hash table. My link list is already working. But i am still confused about how to create any array linklist for solving the collisions. Do i need to create a new instance of the linklist for each array slot? What is the better way to do?
just need some hint to start it.
abdul

Yes, you need to create a new instace for each slot.
LinkedList[] ht = new LinkedList[size];
for(int x = 0; x < size; x++)
ht[x] = new LinkedList();

How to create 2D array with 3 rows and unlimit column?

how to create 2D array with 3 rows and unlimit column?

Here are images of what I described in my previous post
Message Edited by JoeLabView on 11-14-2007 07:56 AM
Attachments:
2D-array_code.PNG ‏7 KB
2D-array_values.PNG ‏13 KB

How to create ArrayColletion in mx:Script from mx:Model id="results" source="/data/data.xml" /

How to create ArrayColletion in mx:Script from <mx:Model
id="results" source="/data/data.xml" />
Please see my code:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
layout="absolute">
<mx:Model id="results" source="/data/data.xml" />
<mx:Script>
import mx.collections.ArrayCollection;
import mx.utils.ArrayUtil;
import mx.controls.Alert;
</mx:Script>
<mx:ArrayCollection id ="dt1"
source="{ArrayUtil.toArray(results.result)}"/>
<mx:Script><![CDATA[
[Bindable]
public var expenses:ArrayCollection = dt1;
[Bindable]
public var expenses2:ArrayCollection = dt1;
[Bindable]
public var dp:ArrayCollection=expenses;
public function changeDataProvider():void{
Alert.show(expenses.toString());
if (dp==expenses){
dp=expenses2;
}else{
dp=expenses;
]]></mx:Script>
<mx:Panel x="10" y="10" width="100%" height="378"
layout="absolute">
<mx:ColumnChart dataProvider="{dt1}" x="10" y="10"
id="myChart" height="318" width="100%">
<mx:horizontalAxis>
<mx:CategoryAxis categoryField="month"/>
</mx:horizontalAxis>
<mx:series>
<mx:ColumnSeries displayName="apple" yField="apple"/>
<mx:ColumnSeries displayName="orange"
yField="orange"/>
<mx:ColumnSeries displayName="banana"
yField="banana"/>
</mx:series>
</mx:ColumnChart>
<mx:Legend dataProvider="{myChart}" x="481" y="10"/>
</mx:Panel>
<mx:Button x="284" y="416" label="Change Data" id="bt"
click="changeDataProvider()" />
</mx:Application>

Tracy,
Thanks. That worked. However I have another related question:
I convert the xml feed to a XMLListCollection by doing:
<mx:XMLListCollection id="mission"
source="{xmlFeed.lastResult.day}"/>
and
<mx:XMLListCollection id="mission1"
source="{xmlFeed.lastResult.day.tBlock}"/>
On the chart I have
<mx:ColumnChart id="missionReadiness" height="150%"
width="100%"
paddingLeft="2" paddingRight="2"
showDataTips="true" dataProvider="{mission1}">
<mx:series>
<mx:ColumnSeries xField="" yField="@today"
displayName="Today"/>
<mx:ColumnSeries xField="" yField="@tomorrow"
displayName="Tomorrow"/>
<mx:ColumnSeries xField="" yField="@afterT"
displayName="After Tomorrow"/>
</mx:series>
</mx:ColumnChart>
the yField works, but for the xField I want to have the @date
but refers to the parent node, so I am clueless on how to refer to
it.
Also, I would like to display on the chart only the values to
a specific date (like @date="05/17/2007").
Any suggestions on how to do that?
Gilbert

How to make a pattern in illustrator from a placed image ?

how to make a pattern in illustrator from a placed image ?

Just embed the image and make a swatch of it.

How to create an array in one field and have another field display certain elements from that array?

I am making a form in Acrobat XI pro.
In one text field, I created an array of several elements. I want other text fields to display certain elements from that array. For instance, one field should display the 3rd element, another field should display the 13th element, etc.
The Javascript for making the array is very long, and so I don't want to have to re-calculate the array every single time (in order to reduce rendering time when I open the form on an iPad). This is why I'd like to only have to create the array once, and simply refer to it throughout the form.

What code are you using to update the array currently? Are you completely rebuiding it when an element changes, or just changing specific elements for certain fields? I'm still not sure what exactly you are trying to do, but something like this in a document level script will create your array:
var myArray;
// Call 'updateArray' to initialize array
updateArray();
function updateArray() {
     // Code here to create/update array
     myArray = new Array();
     myArray[0] = "Value 1";
     myArray[1] = "Value 2";
     myArray[2] = "Value 3";
Then, for each field that needs to update this array, you can add a call to 'updateArray()' in the appropriate event. This will rebuild the array completely; if you just want to update specific elements, then you can access them directly.

How to create an array in bpel?

I am trying to integrate a web service into open-esb. The web service consumes an unbounded array of a "userInfo" data structure. The issue is that although I can create bpel to receive a message like this, due to type incompatibilities I need to create a different array within bpel to pass to the webservice.
To date I have not found a way to create an array within open-esb's bpel. After extensive googling I have found that other ESBs define their own proprietary extensions to add nodes to an array.
Thus I have two questions:
First, does open-esb support creation of arrays? and if so, how do I create the array and add nodes to it?
Second, and perhaps more importantly, is using an <assign> activity the best way to transfer a potentially large array from one variable to another (i.e., will it perform well)? Or should I use XSLT to transform the array from one wsdl type to another? And if XSLT is the answer, how can I do this within open-esb?
Thanks in advance,
Steve
PS. Based on the various googlings Ive been doing this question seems to be frequently asked. If someone will help me find a solution I plan on writing a short "how-to" article for posting back to the community. Given that arrays are one of the most basic data structures I hope the article will be useful for others struggling with this issue.

I think this is all covered in Steve-Nies other thread concerning this subject, entitled "Need help with BPEL please" (http://forum.java.sun.com/thread.jspa?threadID=5116270&tstart=0)

Formatted .data file, reading in and creating an array of objects from data

Hi there, I have written a text file with the following format;
List of random personal data: length 100
1 : Atg : Age 27 : Income 70000
2 : Dho : Age 57 : Income 110000
3 : Lid : Age 40 : Income 460000
4 : Wgeecnce : Age 43 : Income 370000
and so on.
These three pieces of data, Name,Age and Income were all generated randomly to be stored in an array of objects of class Person.
Now what I must do is , read in this very file and re-create the array of objects that they were initially written from.
I'm totally lost on how to go about doing this, I have only been learning java for the last month so anyone that can lend me a hand, that would be superb!
Cheers!

Looking at you other thread, you are able to create the code needed - so what's the problem?
Here's an (not the only) approach:
Create an array of the necessary length to hold the 3 variables, or, if you don't know the length of the file, create a class to contain the data. Then create an ArrayList to hold an instance of the class..
Use the Scanner class to read and parse the file contents into the appropriate variables.
Add each variable to either the array, or to an instance of the class and add that instance to the arraylist.

How to create an array of ArrayLists?

Hello,
I'm trying to compile the following code:
ArrayList<Object> arr[];
arr = new ArrayList<Object>()[size];in order to create an array of ArrayLists. I'm being met with the following compilation error:
The type of this expression must be an array type but it resolved to ArrayList<Object>
Can anyone show me how to correctly do this?
Thanks

{color:#3D2B1F}This line:
List<Object>[] arr = new ArrayList<Object>[5];generates the compiler error: "generic array creation" (generics and arrays don't play well together)
Since you are just parameterizing with Object, you can use non-generic collections:
List[] arr = new ArrayList[5];Me? I don't like mixing arrays and collections. I would have a list of lists:
List<List<X>> matrix = new ArrayList<List<X>>();{color}

How to create an array (or matrix) from an 2d image?

Similar Messages

Maybe you are looking for