Color of a pixel

Hi,
I Want to know how i can know the color of a pixel in an image.
Please provide me with any information.
Regards

hi,
u may get the color of a pixel by the following code
java.awt.Robot robot=new java.awt.Robot();
Color c=robot.getPixelColor(int X,int Y);

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Get the color of a pixel in an image

how can i do to get the color of a pixel in an image ???
Can anyone help me ?

Hi,
first of all you need to get the library to transfer your image to java.awt.image.BufferedImage object.
I know many such libraries. Its depends of what kind of image you have: jpeg, gif, png or other.
And when you get the BufferedImage of you picture using library, then you can get the color of any pixel in image using int BufferedImage.getRGB(int x, int y) as integer value.
Victor Letunovsky

Get the color of a pixel on the Stage

Is there a way to retrieve the color of a generic pixel on the screen using the mouse pointer inside the Stage of Flash Player? With the getPixel method of the BitmapData class you can get the color of a pixel only if the mouse is over a bitmap image, but what if I need the color a generic pixel on the screen?

this takes a snapshot of the pixel below the mouse:
function eventHandler(event:MouseEvent):void
     var bmd:BitmapData = new BitmapData(1, 1, false, 0x000000);
     var matrix:Matrix = new Matrix();
     matrix.translate(event.stageX, event.stageY);
     //can never remember which way translate works so it could be:
     //matrix.translate(-event.stageX, -event.stageY);
     bmd.draw(stage, matrix);
     var pixelColour:uint = bmd.getPixel(0, 0);
my blog has more info: http://blog.leeburrows.com/2010/09/bitmapdata-basics-1/

Setting the color of individual pixels in a bufferedimage

i am trying to set the color of each pixel in a loop as follows:-
BufferedImage bi=new BufferedImage(w,h,BufferedImage.TYPE-INT_RGB);
for(int j=0;j<h;j++){
for(int i=0;i<w;i++){
pixel=translate(i,j);
clr=findcolor(pixel);
if(clr==-1){
bi.setRGB(i,j,0);
else
bi.setRGB(i,j,clr);
findcolor() function just returns an int, so how do take this integer value and set the appropriate color?
when i execute this code,in the PaintComponent method of a JPanel class, my entire panel becomes black, this is not because of my first "if" condition.i checked the return value of my findcolor function.
However if i multiply the color value by a large number like 10000, then i get a few colors only(black,blue, green)
So please let me know how i can get all colors, without having to multiply the value.

What do the translate and findcolor methods do?

How I find color of the pixel on the screen?, How I find color of the pixel on the screen?

How I find color of the pixel on the screen?, How I find color of the pixel on the screen?

DigitalColor Meter, in your Applications/Utilities folder.
Regards.

Find color of specific pixels

I'm working with grayscale images and I need to find average darkness of specific regions. The areas are all perfectly circular.
I can't figure out how to determine the color of specific pixels in an image. Does anyone know of a way? I need to process millions of pixels so I would prefer something that can do this relatively quickly. The images are all grayscale, so I only really need to know the darkness of the pixel.
I don't suppose there is any built-in way of doing this that would be more efficient than my computing the average manually?

Ok, it seems that I can use a BufferedImage to acquire the colors of specific pixels. I found a couple methords that seem relavent:
public int getRGB(int x, int y)
public int[] getRGB(int startX, int startY, int w, int h, int[] rgbArray, int offset, int scansize)
The first is pretty staight forward, but I am interested in performance, and the second sounds like it could be better.
I'm not sure about the meaning of the the scansize argument:
scansize - scanline stride for the rgbArray
Am I right in thinking that rgbArray is defined that the value in the first index (after offset) is the upper left corner, the next is the pixel directly to the right of it. When the index become equal to scanline, you are now on the next row of pixels below.
This doesn't make sense to me because it would defeat the purpose of having 'w' (the width).
Now, the other question is whether using the second methord will actually improve performance...I need circular regions, so using a rectangle will waste data. Would I be better off using getRGB(int x, int y)? How about creating a subclass of BufferedImage designed to extract the colors in a circular manner. Actually, is using a BufferedImage the best approach even?

Change colors of individual pixels on intensity graph?

I would like to be able to change the color of a set of individual pixels within an intensity graph, to blue for example, while leaving the color table otherwise as is, for example, gray scale. The change to blue would be based on location, not on current gray value. I think I can accomplish this using the mask fx with picture controls, and then convert to intensity graph. Is there a more direct way? A good example to demonstrate this capability would be just using a 'mouse down' event on an intensity graph to change the color at the mouse location. Any thoughts are appreciated.
Sincerely,
Don

Yes, seems to work fine .
If you have LabVIEW 8.0, there is another possibility. There is a new property that allows drawing any pictures or picture elements on your graph area. Of course you could draw individual pixels, but nothing prevents you from e.g. drawing circles, squares, odd shaped areas, arrows or event text. ... Anything you could do with a plain picture indicator. One example that ships with LabVIEW 8.0 is Envelope.vi, see image.
Message Edited by altenbach on 06-12-2006 07:31 PM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
envelope.png ‏32 KB

A simple question involving the color of a pixel?

I'm just wondering, I'm using a BufferedImage to load an image and retrieve the pixels by their location in an image. I looked through the APIs, but I can't seem to figure out how to find the shade of each pixel. I understand that each color has a range within the possibilities of the int returned in the method getRGB(). Does the range denote the shade? Or does the alpha value perhaps? I'm not sure. Any help would be appreciated. Thanks!

What do you mean by the "shade"? Do you mean hue?
You might want to look at the HSBtoRGB and RGBtoHSB methods. HSB is a way to describe colors via their hue, saturation, and brightness.
The alpha value indicates the transparency of the pixel.
Just out of curiosity, what are you doing?

Why is my rendered color corrected movie pixelated with jagged edges after rendering?

Hello All,
I am new short film movie producer and have just started using Adobe Premiere CS6 and Audition CS6. Comparing my flat footage before adding it to a sequence and color correcting it and rendering it, it looks fair. But after all these transitions it now looks pixelated along with very jagged edges. This is my first short film for my first client and I am at my witts ends! I have tried to copy the sequence and transfer it to a new sequence with differnt settings comparing the pixel aspect ration, fps, trying to match the clips specs and I am so stuck. Can anyone please offer any suggestions or let me know if there are procedures I have overlooked. Thanks Adobe Community.
Michael Diaz

Let's back up a step - what camera do you use? If it's an HDV model, then yes you have anamorphic footage. Simply choose an HDV sequence preset to match. If your camera shoots 720p or full 1920x1080, those are square pixel (1.0) formats and are not anamorphic (anamorphic does NOT mean widescreen, it means "stretched to widescreen" basically).
In any case, drag a clip to the New Item button for best results until you get more educated and confident about the different formats you may be working with.
If you copied and pasted the contents of the SD sequence into an HD sequence, all filters and effects you had applied before should remain intact and not need reworking, except possible for titles and things involving scaling (since the size has changed).
As for exporting, you typically will NOT want an anamorphic export, except for widescreen DVD. You will not see anamorphic mentioned though, just choose "MPEG-2 DVD" and an appropriate widescreen preset and Adobe knows what to do from there. For web/computer viewing, best to avoid anamorphic footage, since many players assume 1.0 PAR and do not adjust the image for non-square pixels. So if working with 1440x1080 footage, and exporting to web or YouTube for instance, export as 1920x1080 (1.0) or 1280x720 (720p) so the viewer sees the proper 16:9 output, or the image may be squished otherwise!
Thanks
Jeff

Sampling the color of a pixel

I have a very simple question: Is it possible for applescript to sample the color of a specific pixel on my screen and store it in a variable? (or three variables as the case may be)
Thanks

I knew I saw something like this earlier, but it took me a little while to find it.
There is a scripting addition called XTools that lets you move the mouse from AppleScript - it is available at http://lestang.org/osax/XTool/XTool-2.0.dmg.tgz . With XTools installed, it is a simple matter to move the mouse to where you want, then tell DigitalColor Meter to copy the color to the clipboard (it isn't scriptable, but you can use keystrokes):
<pre style="
font-family: Monaco, 'Courier New', Courier, monospace;
font-size: 10px;
margin: 0px;
padding: 5px;
border: 1px solid #000000;
width: 720px;
color: #000000;
background-color: #FFEE80;
overflow: auto;"
title="this text can be pasted into the Script Editor">
move mouse {500, 500} -- requires XTool OSAX
tell application "DigitalColor Meter"
activate
tell application "System Events" to keystroke "c" using {shift down, command down}
end tell
log (get the clipboard)
</pre>

The color of a pixel in Graphics

Hi... does anyone know how to get the Color of a specific pixel in a Graphics object??
For example:
public void paint(Graphics g) {
// Something like this would be great! (but it doesn't exist)
Color c = g.getColor(10,10);
/* etc... */
}Does anyone know something about it?

http://www.rgagnon.com/javadetails/java-0257.html

Getting the Color of a Pixel in a Image

Hi. I need to get the Color of the point in an Image (or ImageIcon). I've seen examples but they use BufferedImages.
Thanks, Bob

Here is a simple conversion for you:
BufferedImage bi = new BufferedImage(myImage, myImage.getWidth(null), myImage.getHeight(null), BufferedImage.TYPE_INT_RGB);
Graphics g = bi.getGraphics():
g.drawImage(myImage, 0, 0, null);If you are using ImageObserver objects, then replace null with the corresponding ImageObserver object in the BufferedImage and drawImage.

How can i find out what color is a certain pixel in a picture file?

Do any of you know if there is some command that returns the color of a pixel in RGB format or something from a picture file?

I think the best way to find pixel RGB from a an image is to use extension of java.awt.RGBImageFilter
Load the picture file as java.awt.Image and apply that Filter you can easily get the RGB of your desired pixel
Replies and queries are greatly appreciated
Ejaz Hussain
class ColorFilter extends RGBImageFilter{
public ColorFilter() {
//whether or not to apply the color filtering
canFilterIndexColorModel = true;
public int filterRGB(int x, int y, int rgb) {
//just store the RGB of your desired pixel at any x,y
return rgb;

How can I rasterize a spot color file without creating "border" pixels between areas that are adjacent to each other but should not be overlapping?

We use Illustrator to create circuit layouts. For part of our process, we create an image of all of the layers using spot colors to show the printed layers overlapping each other. We then rasterize the file and send the image through a Matlab routine that performs some analysis of the circuits based on the colors of the pixels.
In some cases, I have created images with areas next to each other, but not overlapping. When rasterizing the image, the rasterizing process appears to treat the borders as overlapping and creates a single pixel wide border between the 2 areas when there is none. This is playing havoc with our Matlab routine.
I can manually go in and remove the rasterized border, however on some projects, this is a very lengthy process. Has anyone experienced anything like this, or have any ideas on how to prevent this?

Would align to pixel grid help?
Left is not aligned, Right is aligned to pixel grid

Gif images, pixels and hex colors

I'm not a java developer, though I at least have attempted to learn it. This may be a strange place to ask this question but java keeps coming up in my search so what the heck!
I am a highschool biology teacher-to-be and I am trying to design a lesson about DNA transcription and translation. I want the students to play a game where they take hex color codes (codons) and place a color card (amino acid) the hex code represents so that they build a big pixelated picture (the protein). I don't want to do the work of writing down the hex code for each and every pixel of the image, and was hoping there was some way to reveal as a list the hex color of each pixel in some sort of ordered fashion. I tried just dragging a gif file into a text program, but that didn't do it, ha!
Any ideas?
Thanks

mport javax.imageio.*;
import java.io.*;
import java.awt.image.*;
public class Test {
    public static void main(String[] args) throws Throwable{
     BufferedImage bi = ImageIO.read( new File( args[0] ) );
     for( int x = 0; x< bi.getWidth(); x++ ) {
         for( int y = 0; y< bi.getHeight(); y++ ) {
          System.out.print( Integer.toHexString( bi.getRGB( x, y ) ) + "," );
         System.out.println( "" );
}Compile:
javac Test.java
run:
java Test theNameOfImage.gif
??

Color of a pixel

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