load file and saving in other format (image files)

Question

aldif 2014-7-21

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/142760-load-file-and-saving-in-other-format-image-files

评论： Image Analyst 2014-7-22

I currently trying to write a code to load my image from a directory and loop each each of them in Matlab then i need to save my image files into another folder and save into another format for example png,jpg...here is the code for me to load the images file from my directory ,but I facing the problem when I trying to save the images into another format ...anyone can tell me where is my problem because I am new on this

file = dir('C:\Users\doey\Documents\Sushi time ,Pv10'); file = file(~[file.isdir]); NF = length(file); images = cell(NF,1); for k = 1 : NF disp(file(k).name); images{k} = imread(fullfile('C:\Users\doey\Documents\Sushi time ,Pv10', file(k).name)); end savesas(file(k),'C:\Users\doey\Desktop\gg','png');

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2014-7-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/142760-load-file-and-saving-in-other-format-image-files#answer_145903

Like I said in my answer to your duplicate question, use "images" in imwrite(), not "image" . image is the name of a built in function. When you call image, you just get a handle id - a single number which is floating point. It's more than one, so you're essentially saving a single white pixel. Use "images" not "image".

2 个评论
显示无隐藏无

aldif 2014-7-22

yes,it work all fine now,thx for your help,appreciated =D

Image Analyst 2014-7-22

Misspellings/typos are common so you're not alone. You're welcome. Can you go ahead and mark my Answer as Accepted then?

请先登录，再进行评论。

Answer 2

Joseph Cheng 2014-7-21

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/142760-load-file-and-saving-in-other-format-image-files#answer_145826

I would use imwrite(). I am not familiar with savesas() perhaps you're using saveas()?

with imwrite you can set what type of image format you want to use. Also perhaps reading and writing within the forloop would be more efficient as you're not using more memory by opening all images. That way you'll only use what you actually need (if you're not using the image data otherwise).

3 个评论
显示 1更早的评论隐藏 1更早的评论

Joseph Cheng 2014-7-21

编辑：Joseph Cheng 2014-7-21

在 MATLAB Online 中打开

like i said in my answer you can do the writing inside the for loop

for k=1:NF
   image = imread()
   imwrite(image,fullfile('whatever path you want',[file(k).name(1:end-4)'.png'])) %add more parameters if you need to. and change for extension.  
end

Check the documentation on imwrite for full listing of parameters and examples of how to use.

aldif 2014-7-22

tq ,i have tried and rework my code as this :

file = dir('C:\Users\doey\Documents\Sushi time ,Pv10');

file = file(~[file.isdir]); NF = length(file);

for k = 1 : NF

images = imread(fullfile('C:\Users\doey\Documents\Sushi time ,Pv10', file(k).name)); imwrite(image,fullfile('C:\Users\doey\Desktop\gg',[file(k).name(1:end-4),'.jpg']))

end

this works in saving my images into my file but when i trying to open it it showing blank,i have no idea for now ...

请先登录，再进行评论。