How to embed image watermark bits into histogram of the audio file?

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Bhavneet Sharma 2019-3-9

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/449106-how-to-embed-image-watermark-bits-into-histogram-of-the-audio-file

评论： Bhavneet Sharma 2019-3-13

I have an image watermarks that is converted into binary bits and histogram of an audio wav file. I need to embed the watermarking bits in the histogram.

close all;
clc;
% read image 
[embededimage_fname, image_pthname] = ...
    uigetfile('*.jpg; *.png; *.tif; *.bmp', 'Select the Cover Image');
if (embededimage_fname ~= 0)
    embedded_image = strcat(image_pthname, embededimage_fname);
    embedded_image = double( rgb2gray( imread( embedded_image ) ) );
    embedded_image = imresize(embedded_image, [512 512], 'bilinear');
else
    return;
end
% read audio
[watermarkAudio_fname, watermark_pthname] = ...
    uigetfile('*.wav', 'Select the Watermark audio');
if (watermarkAudio_fname ~= 0)
    watermark_audio = strcat(watermark_pthname, watermarkAudio_fname);
    [n, fs] = audioread(watermark_audio);            % "n" is number of  samples and fs is the sample rate 
    %watermark_audio = imresize(watermark_audio, [512 512], 'bilinear');
else
    return;
end
imbin_seq = reshape(dec2bin(embedded_image, 8) - '0', 1, []);
% To calculate modified mean
na = 2^15;
n = n*na;
nLength = length(n);
modified_mean = mean(abs(n));
% Embedding Range
lmda = 2.4;    %pick any value of lmda from the range (2.0, 2.5);
e_range = ceil(lmda * modified_mean);
%number of bins and Bin Width
h = histogram(n);
Bin_Num = h.NumBins();
Bin_Width = h.BinWidth();

Now, my next step is selecting three consecutive bins of the histogram and then 1 bit of watermark is embeded into these 3 bins. I am not getting how to this embedding, suggest me how to perform this watermarking??

Thanks in Advance!!!!