asked on

how to get pixel from an image in multidimensional array

I'm using JAI package.
How to get the pixel from an image but in the form multidimensional array?
Cause i must read the pixel in 8x8 block.
I found method getPixels() but the result is single array.
Can someone help me to solve this problem? Pls, pls, pls...
Thank you

cemplukcute2003

ASKER

Ok, i'm trying using PixelAccessor class.
And from there i got a method getPixels which give me the result in UnpackedImageData type.
Here is my code :

RenderedImage img = JAI.create("fileload", "lena512.pgm");
Raster rasterPic = img.getData();
SampleModel sample = rasterPic.getSampleModel();
PixelAccessor pixAcc = new PixelAccessor(img);
UnpackedImageData pix = pixAcc.getPixels(rasterPic, rasterPic.getBounds(), DataBuffer.TYPE_INT, false);
int[][] tempPix = pix.getIntData();

But why the method getIntData() gives result 1 row only?
Doesn't it suppose to give the whole pixel in an image?
Is there someone who can help me to solve this?
Thank you

ADSLMark

Well I took the liberty to look inside the source code of the JAI PixelAccessor.

The javadoc is very unclear but the double array is used for bands. I found that the pixel information is stored in a single array and then stored into a double array where the number of bands becomes the second array length. So all the pixels are stored in sequence, for 8x8 that would mean 64 integers, just make a double for loop to get 8 integers 8 times, shouldn't be so hard.

Mark

ASKER CERTIFIED SOLUTION

Weiping Du

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial