how to crop the region image only and eliminate the light

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KURNIAWAN 2012-6-5

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https://ww2.mathworks.cn/matlabcentral/answers/40377-how-to-crop-the-region-image-only-and-eliminate-the-light

i have some problem,, i caputured imaged from my camera

picture 1 : <http://tinypic.com/view.php?pic=k4yyyd&s=6>

picture 2 :http://tinypic.com/view.php?pic=zumsjm&s=6

I need coding to solve the problem,,,, ceramic picture above there is still a light on it, how do I get rid of the light (reduce light) ???? and also how to crop that images just crop the region of ceramic tiles? (i ever used coding imcrop , but imcrop just crop into rectanguler not specify on edge)

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Ryan 2012-6-5

Do you wish to crop the tiles automatically or via the user?

KURNIAWAN 2012-6-5

just crop the region first? before i wanna process the picture into m-file, i wanna crop 1st and loss the light,,

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回答（1 个）

Image Analyst 2012-6-5

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https://ww2.mathworks.cn/matlabcentral/answers/40377-how-to-crop-the-region-image-only-and-eliminate-the-light#answer_50026

在 MATLAB Online 中打开

Find the tile, like I showed you before. Then use the any() function and find() function to find the top and bottom rows of the binary image, and the left and right edge of the binary image. Then construct your rectangle [x y width height] and pass that in to imcrop. About 7 lines of code (minimum). Something like

hProfile = any(binaryImage, 1);
col1 = find(hProfile , 1, 'first');
col2 = find(hProfile , 1, 'last');
vProfile = any(binaryImage, 2);
row1 = find(vProfile , 1, 'first');
row2 = find(vProfile , 1, 'last');
imcrop(.....