How can I embedd data to an image

I have an M X N image with each pixel grayscale value x∈[0,255]. I need to embedd some binary data to this image. For that I need to perform the following operations.

1. Scan the image, once meet the pixel (whose grayscale value is a), check the to-be-embedded bit. If the to-beembedded bit is “1”, the pixel grayscale value is changed to a+1. If the bit is “0”, the pixel value remains a.

[Jan]

These are detailed instructions. But what is your question? What have you tried so far and which problems occurred?

What kind of help do you expect from a forum?

[Vishnu M S]

I found the peak point in the histogram. I need to shift the histogram (from the location of that peak point up to location 255) towards right by 1 unit.

Answer 1

[Image Analyst]

% Shift histogram right by one bin:
[maxCounts, indexOfMax] = max(counts)  % counts is your histogram
counts(indexOfMax:end) = count(indexOfMax-1:end-1);