load file and saving in other format (image files)

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');

Answer 1

[Image Analyst]

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".

[aldif]

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

[Image Analyst]

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

Answer 2

[Joseph Cheng]

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).

[aldif]

are there any problem with me using imwrite because my image output which going to be write are images{k} which k=1:NF ...is that any method for me to do the saving 1by1 while looping the files instead of saving whole set of images after gone through the looping?

[Joseph Cheng]

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]

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 ...