How can I find old point in old image before resampling?

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bkshn 2013-11-25

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https://ww2.mathworks.cn/matlabcentral/answers/107489-how-can-i-find-old-point-in-old-image-before-resampling

编辑： Image Analyst 2013-11-26

Hello I have an image and I did resampling on it

( NI = imresample([0.5,0.5],I,[1,1],'linear');)

can I find old pixel in first image from resampled image? in fact I want to know what was the pixel NI(1,1) in image I?

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Image Analyst 2013-11-25

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https://ww2.mathworks.cn/matlabcentral/answers/107489-how-can-i-find-old-point-in-old-image-before-resampling#answer_116278

在 MATLAB Online 中打开

imresample is not in base MATLAB or the Image Processing Toolbox. It's a pretty good bet though that the (1,1) pixel has the same value in both images. Of course it is trivial to check that:

difference = abs(double(oldImage(1,1)) - double(newImage(1,1)))

It probably doesn't move.

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bkshn 2013-11-26

编辑：Image Analyst 2013-11-26

I find it in mathworks/file exchange http://www.mathworks.com/matlabcentral/fileexchange/22443-image-resampling

and send email to its author , but he didn't answer. anyway thanks for your answer

Image Analyst 2013-11-26

编辑：Image Analyst 2013-11-26

Maybe you should use imresize() instead. Would that do what you need to do, or is there something special about imresample? Not from what I can see. It appears to be only for those unfortunate souls who do now have the Image Processing Toolbox.

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