how to assign zero value to all pixels in an image ?
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assign zero value to pixel
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Jan
le 11 Sep 2013
It depends on what an "image" is. Please post more details in future questions. Fortunately the procedure to set the values to 1 is equal:
Img = rand(1024, 768, 3); % RGB image
Img(:) = 0;
Img2 = randi([0, 255], 1024, 768, 'uint8');
Img2(:) = 0;
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sidra
le 11 Sep 2013
I don't understand what purpose setting all the pixel values to zero would achieve.
Nevertheless One of the method is:
You can use two for loops starting from 1 to you image size and the within these loops set the pixel values to zero. Something of this sort
for i=1:n
for j=1:m
img(i,j)=0;
end
end
where n and m are the number of rows and columns respectively.
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Image Analyst
le 11 Sep 2013
% Find all pixels < 3
binaryImage = f < 3; % binaryImage is what you called x
Now, what's f(n)? What is n? In f(x), x is all pixels less than 3. But what is n in f(n)?
Image Analyst
le 11 Sep 2013
Yet another way
grayImage = zeros(size(grayImage), 'uint8');
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