How can I embedd data to an image

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Vishnu M S 2013-1-17

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/59061-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.

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Jan 2013-1-17

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 2013-1-17

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.

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Answer 1

Image Analyst 2013-1-17

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/59061-how-can-i-embedd-data-to-an-image#answer_71489

在 MATLAB Online 中打开

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