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Embedding visible watermark in color document.

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I want to embed a visible watermark in a color document image in the blank space (black rectangle as shown in image) as shown in the attached image. I'll be very thankful to you.
With regards

Accepted Answer

Shravan Kumar Vankaramoni
Shravan Kumar Vankaramoni on 23 Mar 2021
Edited: Shravan Kumar Vankaramoni on 23 Mar 2021
Hi Balkar Singh,
Alpha blending method is used to watermark an image here
Watermarked_Image = Original_Image *alpha + (1-alpha)*watermark
Where alpha is the transparency parameter.
The following code demostrates this,
watermark = imread('saturn.png');
%Resize the watermark according to the area
modified = imresize(watermark,[64,64],'bilinear');
disp(size(modified));
original_image = imread('Marksheet1.png');
temp = zeros(size(original_image),'uint8');
[rows, cols, depth] = size(modified);
%Co-ordinnates to place the watermark
X = 21;
Y = 441;
temp(X:X+rows-1,Y:Y+cols-1,:) = modified;
temp(301:364,101:164,:) = modified;
temp(301:364,401:464,:) = modified;
alpha = 0.8;
watermarked_image = alpha * original_image + (1-alpha)*temp;
imshow(watermarked_image);
  4 Comments
Balkar Singh
Balkar Singh on 25 Mar 2021
@Shravan Kumar Vankaramoni Sir I have queries related to the above code
  1. is it possible to implement the above code with the help of any transform like DWT.
  2. How can I make the above code dynamic
With regards

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