Analyze monochrome image using histogram(count white pixels)
Hi ,
Am still a begginner in Java and i have a project to analze image using histogram and display the result...i've been working on different things till i reached to this code(below) which is missing the count function(my target), this code takes a .bmp image and display the histogram..but there is a problem in the result coz i don't know how to put the count function in it ...the count function counts the white pixels only through its pixels' scan and the count result is displayed on the histogram .....
kind of:
for(h=0,h<image size,h++)
if{
pixel is white then Count ++ and put number on histogram else get out of the loop ...........
So Plz Any HELP!!!!!!!
this is my code for editting:
package display;
import java.awt.BorderLayout;
import java.awt.image.renderable.ParameterBlock;
import javax.media.jai.Histogram;
import javax.media.jai.JAI;
import javax.media.jai.PlanarImage;
import javax.swing.JFrame;
public class DisplayHistogramApp extends JFrame
private DisplayHistogram dh;
public DisplayHistogramApp(String name,Histogram histo)
setTitle("Histogram of "+name);
getContentPane().setLayout(new BorderLayout());
dh = new DisplayHistogram(histo,"Histogram of "+name);
getContentPane().add(dh,BorderLayout.CENTER);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
setVisible(true);
public static void main(String[] args)
PlanarImage image = JAI.create("fileload", args[0]);
ParameterBlock pb = new ParameterBlock();
pb.addSource(image);
pb.add(null);
pb.add(1);
pb.add(1);
pb.add(new int[]{256});
pb.add(new double[]{0});
pb.add(new double[]{256});
PlanarImage temp = JAI.create("histogram", pb);
Histogram h = (Histogram)temp.getProperty("histogram");
new DisplayHistogramApp(args[0],h);
Regards to All..
HI.....I mentioned in my first post that I am a beginner in JAVA..Inaddition,this is my first project...and am still a student too !!!
Also I wonna thank Maxideon for the help:)..I followed the steps you gave to me and i read a little about swing and took the paintComponent(...) from DisplayHistogram..probably i did same thing used(Display Histogram and DisplayHistogramApp)..And i put the hist[x] in the main...called it from ColumnHistogram as
public ColumnHistogram(int[] hist) {
this.hist = hist;
}Upon buildMainProject no errors occured..however when Run...a Disaster showup:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at mine.ColumnHistogram.paintComponent(ColumnHistogram.java:107)
at javax.swing.JComponent.paint(JComponent.java:1027)
at javax.swing.JComponent.paintChildren(JComponent.java:864)
at javax.swing.JComponent.paint(JComponent.java:1036)
at javax.swing.JComponent.paintChildren(JComponent.java:864)
at javax.swing.JComponent.paint(JComponent.java:1036)
at javax.swing.JLayeredPane.paint(JLayeredPane.java:564)
at javax.swing.JComponent.paintChildren(JComponent.java:864)
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5129)
at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:277)
at javax.swing.RepaintManager.paint(RepaintManager.java:1217)
at javax.swing.JComponent.paint(JComponent.java:1013)
at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:21)
at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:60)
at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:97)
at java.awt.Container.paint(Container.java:1762)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:814)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:714)
at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:694)
at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:128)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
What might me My Mistakes!!!???
Regards
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HANDLER
ret = FALSE;
END_HANDLER
return ret; -
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GetImage
Syntax: unsigned char* GetImage(int handle)
Description: This function grabs the image of a fingerprint from the UFIS scanner.
Parameters: Handle of the scanner
Return values: Pointer to 1D-array, which contains the 8-bit grayscale pixel matrix line by line.
here is sample C++ code which works fine to show image in C++
void Show(unsigned char * bitmap, int W, int H, CClientDC & ClientDC)
int i, j;
short color;
for(i = 0; i < H; i++) {
for(j = 0; j < W; j++) {
color = (unsigned char)bitmap[j+i*W];
ClientDC.SetPixel(j,i,RGB(color,color,color));
Will appreciate your help .Hi Joel,
The database nls parameters are:
select * from nls_database_parameters;
NLS_LANGUAGE AMERICAN
NLS_TERRITORY AMERICA
NLS_CURRENCY $
NLS_ISO_CURRENCY AMERICA
NLS_NUMERIC_CHARACTERS .,
NLS_CHARACTERSET CL8MSWIN1251
NLS_CALENDAR GREGORIAN
NLS_DATE_FORMAT DD-MON-RR
NLS_DATE_LANGUAGE AMERICAN
NLS_SORT BINARY
NLS_TIME_FORMAT HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT DD-MON-RR HH.MI.SSXFF AM TZR
NLS_DUAL_CURRENCY $
NLS_COMP BINARY
NLS_LENGTH_SEMANTICS BYTE
NLS_NCHAR_CONV_EXCP FALSE
NLS_NCHAR_CHARACTERSET AL16UTF16
NLS_RDBMS_VERSION 9.2.0.4.0
Part of the email header:
Content-Type: multipart/alternative; boundary="---=1T02D27M75MU981T02D27M75MU98"
-----=1T02D27M75MU981T02D27M75MU98
-----=1T02D27M75MU981T02D27M75MU98
Content-Type: text/plain; charset=us-ascii
-----=1T02D27M75MU981T02D27M75MU98
Content-Type: text/html;
-----=1T02D27M75MU981T02D27M75MU98--
I think that something is wrong in the WWV_FLOW_MAIL package. In order to send 8-bit characters must be used UTL_SMTP.WRITE_ROW_DATA instead of the UTL_SMTP.WRITE_DATA.
Regards,
Roumen -
Bitmap images using Dreamweaver 4
I have Dreamweaver version 4, and though I can insert JPEG,
PNG, and GIF images the application won't let me insert BMP files
(I insert them, but the image won't appear). Is there any way I can
fix this?
thanks.>>BMP files are displayed by > Internet Explorer
*only*
Depends on the kind of BMP file it is. And could depend on
the graphics card
of the users computer.
A BMP is a type of bitmap raster graphic in a data file
representing
generally rectangular grid of pixels (points of colour). The
colour of each
pixel is individually defined usually in three bytes...one
byte for each
portion of the RGB colour space.
Photoshop reserves the term "bitmap" for one-bit/channel
images (pure black
or white).
Microsoft's BMP files are generally compressed and need not
even contain
bitmap data (they can contain indexes into palettes).
The monitor doesn't get the raster image. Rather, it gets a
signal which
scans the screen 60 times a second. It's the graphics card
that gets the
raster: it contains memory which it can read and the computer
can write. Of
the several ways the raster could be stored in that memory -
all the red
values together, or the threee colours for each pixel
together, and
vertically or horizontally, etc. etc. - most are in use by
various graphics
cards. It's the job of the device driver toy copy that memory
in the correct
format for the card.
> because the format was invented by Microsoft (I'm
guessing.)
I believe the BMP format was originally developed by IBM but
evolved through
several states by Micosoft since. Microsoft "invented"
version 4 and version
5, BMP formats, for instance. -
I discovered that when using Particle Playground, with the particle type set to faded sphere, and the color of the particle set in the purple/violet hue range, that a ring of white pixels dust appears around the circumference of each particle. If I change the particle color to green or orange or something outside the violet range, the artifact vanishes.
This is in CS3, and it appears during both preview and render to RAM.The pure white pixels are abruptly-gone when the hue is rotated away from the violet range, so I don't think it's an HDR issue. Also, I noticed on the larger particles passing closer to the 'camera' that the white pixels form a complete circle, which gets cropped off as the 'bubble' (what the white pixel outline looks like) passes about 1/4 of the preview window width to the right. The left 1/4 of the window shows this artifact--the rest does not. I also confirmed that this does not show up on rendered images.
Maybe you are looking for
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