Video Watermarking | how to add a colored watermarking image into the largest visual capacity's block in number of frames in a video

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Hi everyone, i need to implement a watermark scheme for videos. i should read the video frame by frame, then i need divide the frame being reed into equally sized blocks. Then, select the largest block in terms of visual capacity (i'm not sure if this means the RGB value or something else) to embed the watermark with. i would like to implement text. i know how to read the video frame by frame, save each single frame in a file, then recall them in sequence to view the reconstruct the video.
I don't know how to compute the visual capacity and then select the blocks with the larger possible visual capacity to embed the watermark image in. Also, i did not found any tutorial in color watermarking so can you lead me to a helpful source?
I'm considering the robustness and resolution.
any help will be appreciated! thanks in advance.

Réponses (1)

Walter Roberson
Walter Roberson le 25 Nov 2015
There is no built-in MATLAB routine to calculate "visual capacity" and there is no File Exchange contribution for that purpose either. You will need to research in papers and books to find an explanation of what it means and how to calculate it, and you will need to start implementing it.
Here in the MATLAB Answers facility, we do not "Research It For Me". This is a facility to discuss the MATLAB language, not to research algorithms.
  1 commentaire
Shahad
Shahad le 25 Nov 2015
Dear Mr. Walter, I posted this question because i'm lost and this is the first time i deal with Matlab. i did not mean to have someone to research for me, i just need a guidance to start my work. i also thought that calculating the visual capacity is built in like the other functions related to calculating the RGB values. thanks for your help.

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