how to plot in red colour on image

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mohd
mohd 2012-4-19
hi.. i have coordinate (x y)on image. i want to plot to red color on that image. how to do this. thanks

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采纳的回答

Image Analyst
Image Analyst 2012-4-19
Maybe you mean
plot(columnX, rowY, 'r+', 'MarkerSize', 30, 'LineWidth', 3);
If not, describe what you mean by "plot to red".

更多回答（1 个）

Geoff
Geoff 2012-4-19
You mean you want to change the pixel at x,y to red?
img(y,x,:) = [255 0 0]

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