Cropping image without using imcrop or imresize

Question

Alex Flores 2017-5-20

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/341069-cropping-image-without-using-imcrop-or-imresize

回答： Walter Roberson 2017-5-20

Hey guys, So I have to crop a bunch of loaded in images without using imresize or imcrop to dimensions 120x129. I also have to plot all of the images onto a single figure. Ive tried a few things and nothing seems to work. This is the code I used to load in all of the images

imageFiles= dir('*.jpg')
nFiles=length(imageFiles)
iWant=cell(nFiles,1)
for ii=1:nFiles
    iWant{ii}=imread(imageFiles(ii).name)
end

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Answer 1

Walter Roberson 2017-5-20

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/341069-cropping-image-without-using-imcrop-or-imresize#answer_267720

在 MATLAB Online 中打开

imcrop() works by indexing parts of the array. imcrop(A, [x y width height]) is

A(y:y+height-1, x:x+width-1, :)

There are multiple ways to resize images. One of them involves fft2(). One of them involves interp2(). One of them involves wavelets. There are other ways.