how can chose a fix rectangular in series of images that position may be changeable?

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sara 2015-4-29

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回答： sara 2015-4-29

I have to extract the rectangle for a seris of images that the size of rectangular is 30*30 but the position of rectangular is changeable in every images. Is there any way? I know that I can use imcrop and getrect. but these command need xmin,ymin position. I just need to fix xwith and ywitd. Is there any way?

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回答（2 个）

Thomas Koelen 2015-4-29

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在 MATLAB Online 中打开

imshow('pout.tif')
h=imrect(gca,[0 0 30 30]);
wait(h)

Gives you a draggable rectangle with xwidth and ywidth of 30.

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sara 2015-4-29

编辑：sara 2015-4-29

thanks Thomas Koelen and Image Analyst...but how can cut this segment that the coordinate preserved? can I use imcrop after this?

Image Analyst 2015-4-29

Cut? What does that mean? And do you need to have the width be 30 after the user is done with it, or will you take whatever he made it?

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sara 2015-4-29

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dear Image Analyst

I need to have the width be 30 after the user is done with it. you have a demo in this link http://www.mathworks.com/matlabcentral/answers/86477-how-to-isolate-certain-part-of-image at the of this page I find a code that when I run it, the result is like below:

I want to have a fix size square (30*30) that user can change the coordinate and has a result like below...i mean crop image with original coordinate. I hope that I could explain my opinion.