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how can I generate a grayscale image with the triangle having an intensity value of 22 and the background having an intensity value of 229.

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Nosipho Majola 2021-12-10

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https://ww2.mathworks.cn/matlabcentral/answers/1608210-how-can-i-generate-a-grayscale-image-with-the-triangle-having-an-intensity-value-of-22-and-the-backg

评论： Nosipho Majola 2021-12-12

采纳的回答： Voss

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Nosipho Majola 2021-12-11

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Voss 2021-12-10

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A = imread('image.png'); % image.png is the image posted, which is a logical array
A_out = zeros(size(A),'uint8'); % greyscale output image -> 2-D uint8
A_out(~A) = 229; % background = 229
A_out(A) = 22; % foreground = 22
% A_out is the requested output image
imwrite(A_out,'image_out.png'); % write it to file if you like

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Voss 2021-12-11

Great, no problem. Please mark my answer as accepted, if you don't mind.

Nosipho Majola 2021-12-12

many thanks, marked.

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MATLAB Graphics Images Modify Image Colors

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R2021a

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