how to modulate two images in which one is color image and other is matlab generated object?

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ajeet verma
ajeet verma 2017-3-22
回答： Hitesh 2025-3-5
i want to modulate color fringe pattern(i) with matlab generated peak object(Q), i have a code % object
m = 256;
n = 256;
[x,y,z] = peaks;
z = imresize(z,[m,n]);
Q = exp(1i*z*2.5); % Increase the fringes by 2.5 times
imshow(Q,[])
% color fringe pattern
f1 = 20; % No. of vertical fringes
f2 = 0; % No. of horizontal fringes
a1 = zeros(m,n);
a2 = zeros(m,n);
a3 = zeros(m,n);
for i = 1:m
for j = 1:n
a1(i,j) = exp(1i*(2*pi*(f1*j/n+f2*i/m)-2*pi/3));
a2(i,j) = exp(1i*(2*pi*(f1*j/n+f2*i/m)));
a3(i,j) = exp(1i*(2*pi*(f1*j/n+f2*i/m)+2*pi/3));
end
end
Color = zeros(m,n,3);
Color(:,:,1) = a1;
Color(:,:,2) = a2;
Color(:,:,3) = a3;
% imshow(Color,[]),impixelinfo;
% imwrite(Color,'myimage.jpg');
% i = imread('myimage.jpg');
so how to modulate i with Q ?

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回答（1 个）

Hitesh
Hitesh 2025-3-5
Hi ajeet,
To modulate the color fringe pattern "Color" with the MATLAB generated object "Q", you need to perform element-wise multiplication between the two arrays. This will apply the modulation pattern "Q" to each channel of the color image. Kindly refer to the following code:
% Modulate each channel of the color image with Q
ModulatedColor = zeros(m, n, 3);
ModulatedColor(:,:,1) = Color(:,:,1) .* Q;
ModulatedColor(:,:,2) = Color(:,:,2) .* Q;
ModulatedColor(:,:,3) = Color(:,:,3) .* Q;
% Display the modulated color image
imshow(ModulatedColor, []);
impixelinfo;
  • Element-wise Multiplication: The operation Color(:,:,k) .* Q is performed for each color channel k. This multiplies each element of the color channel by the corresponding element in "Q".
  • Complex Numbers: Since "Q" and "Color" are complex arrays, the multiplication will affect both the magnitude and phase of the original color image.

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