In case of an image with LSB enhancement applied, I cannot think of a way to reverse it back to its original state because there is no clue about the original values of RGBs. They are set to either 255 or 0 depending on their Least Significant Bit. The other option I see round here is if this is some sort of protocol to include quantum steganography.
Matlab and some steganalysis techniques could be the key to your issue though.
Here’s a Java chi-square class for some statistical analysis:
private long[] pov = new long[256];
and three methods as
public double[] getExpected() {
double[] result = new double[pov.length / 2];
for (int i = 0; i < result.length; i++) {
double avg = (pov[2 * i] + pov[2 * i + 1]) / 2;
result[i] = avg;
}
return result;
}
public void incPov(int i) {
pov[i]++;
}
public long[] getPov() {
long[] result = new long[pov.length / 2];
for (int i = 0; i < result.length; i++) {
result[i] = pov[2 * i + 1];
}
return result;
or try with some bitwise shift operations as:
int pRGB = image.getRGB(x, y);
int alpha = (pRGB >> 24) & 0xFF;
int blue = (pRGB >> 16) & 0xFF;
int green = (pRGB >> 8) & 0xFF;
int red = pRGB & 0xFF;