Hi. I want to compare two images. One image is on the android client
and another image is on the server (with Tomcat, JDK). I need also to
calculate two histograms - one for each image - and to compare they
The problem is: getPixel (x, y) (on Android) and getRGB (x, y) (JDK)
return different rgb color numbers for the point with the same
coordinates (x, y). The images are here identical (JPG, Size: 3x3).
Why are the results different? And what to do? I've been looking for
the answer everywhere, but...
***************************************
Pseudocode for Androids Activity
***************************************
BitmapFactory.Options opt = new BitmapFactory.Options();
opt.inPreferredConfig = Bitmap.Config.ARGB_8888;
mBitmap = BitmapFactory.decodeFile(imageSource, opt);
int intColor = 0;
for (int x = 0; x < mBitmap.getWidth(); x++) {
for (int y = 0; y < mBitmap.getHeight(); y++) {
intColor = mBitmap.getPixel(x, y);
System.out.print(" ("+ x + ","+ y +") c:" + intColor);
}
}System.out.println();
Result for example image 3x3:
(0,0)c:-7882802 (0,1)c:-9859138 (0,2)c:-6507579
(1,0)c:-12883825 (1,1)c:-6574388 (1,2)c:-7948604
(2,0)c:-7489593 (2,1)c:-10579009 (2,2)c:-6573359
************************
Pseudocode for JDK
************************
BufferedImage img = ImageIO.read( file );
int intColor = 0;
for ( int x = 0; x < img.getWidth(); x++ ) {
for ( int y = 0; y < img.getHeight(); y++ ) {
intColor = img.getRGB( x, y );
System.out.print(" ("+ x + ","+ y +") c:" + intColor);
}
}System.out.println();
Result for the same image:
(0,0)c:-7883056 (0,1)c:-9728065 (0,2)c:-6507579
(1,0)c:-12818030 (1,1)c:-6377523 (1,2)c:-7883323
(2,0)c:-7424055 (2,1)c:-10513470 (2,2)c:-6573358
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