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Writing processed image into new image not working as expected

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Marie-Sophie Pichler
Marie-Sophie Pichler on 15 Jan 2020
Answered: Jyothis Gireesh on 20 Jan 2020
i am trying this:
I(1, 1, :) = [26, 45, 34];
the pixel is white even though the right colors are printed if i check I(1, 1)...

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Answers (2)

Jyothis Gireesh
Jyothis Gireesh on 20 Jan 2020
I am assuming here that the matrix “I” is of datatype double and “imshow()” function is used to display the image. Since the expected range of values for a double image is in between 0 & 1, the values assigned to the pixel at (1,1) are rounded off to the maximum value (1) which using “imshow()”. Hence the particular pixel appears to be white.

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Image Analyst
Image Analyst on 20 Jan 2020
You can try
imshow(I, []);
though if your image is double, and all the other pixels are in the range 0-1, all the other pixels will display as very dark. You might try dividing by 255:
I(1, 1, :) = [26, 45, 34] / 255;

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