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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)...

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.

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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