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how can I convert many images from m x n x 3 to m x n by rgb2gray?

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Bajdar Nour
Bajdar Nour 2020-4-3
回答： Image Analyst 2020-4-4
I want to convert 50 .jped images in a folder alltogether
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Geoff Hayes
Geoff Hayes 2020-4-3
You would need to come up with a naming convention for the grayscale images and/or determine where these new files should be written to.

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采纳的回答

KSSV
KSSV 2020-4-4
img = dir('*.jpeg') ;
N = length(img) ;
for i = 1:N
thisimg = img(i).name ;
I = imread(thisimg) ;
Ig = rgb2gray(I) ;
[dir,name,ext] = fileparts(thisimg) ;
filename = [name,'_gray','.jpeg'] ;
imwrite(Ig,filename) ;
end

更多回答（1 个）

Image Analyst
Image Analyst 2020-4-4
See the FAQ
https://matlab.fandom.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F
In the loop, use sprintf() to build up your filename and use rgb2gray() if ndims() of the image is 3.

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