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applying impyramid to many images and saving then seperately

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Mustafa Yildiz
Mustafa Yildiz 2020-3-17
关闭： MATLAB Answer Bot 2021-8-20
Hello i have a image data and i want to appyl impyramid to all these images and save them in different folder, here is the code i wrote, my question is how to make is shorter so it wont take too long time for process.
srcFiles = dir('C:\Users\mstfy\Desktop\Matlab\alex\aadeneme\*.jpg');
for i = 1 : length(srcFiles)
filename = strcat('C:\Users\mstfy\Desktop\Matlab\alex\aadeneme\',srcFiles(i).name);
im = imread(filename);
k = impyramid(im, 'reduce');
j = impyramid(k,'reduce');
m = impyramid(j,'reduce');
l = impyramid(im,'expand');
n = impyramid(l,'expand');
v = impyramid(n,'expand');
newfilename=strcat('C:\Users\mstfy\Desktop\Matlab\alex\aadeneme1\',srcFiles(i).name);
newfilename1=strcat('C:\Users\mstfy\Desktop\Matlab\alex\aadeneme2\',srcFiles(i).name);
newfilename2=strcat('C:\Users\mstfy\Desktop\Matlab\alex\aadeneme3\',srcFiles(i).name);
newfilename3=strcat('C:\Users\mstfy\Desktop\Matlab\alex\aadeneme1a\',srcFiles(i).name);
newfilename4=strcat('C:\Users\mstfy\Desktop\Matlab\alex\aadeneme2a\',srcFiles(i).name);
newfilename5=strcat('C:\Users\mstfy\Desktop\Matlab\alex\aadeneme3a\',srcFiles(i).name);
imwrite(k,newfilename,'jpg');
imwrite(j,newfilename1,'jpg');
imwrite(m,newfilename2,'jpg');
imwrite(l,newfilename3,'jpg');
imwrite(n,newfilename4,'jpg');
imwrite(v,newfilename5,'jpg');
end

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回答（1 个）

Raunak Gupta
Raunak Gupta 2020-3-20
Hi,
Since it is required to store all the jpg file generated from successive impyramid expansion and reduction, in my opinion I don’t see further optimization rather than using parfor instead of for loop for speeding up the code. Since images are independent of each other the parfor will provide speed up based on the number of workers/CPU Cores available in your device. Note that for using parfor you need to have Parallel Computing Toolbox installed.

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