problem with .png images into a list

Hello!

i have some .png images in the file, and i use these commads

list = dir('*.png');

C={list.name};

B=sort_nat(C); %make a sorted list

for i = 1:9

img{i} = imread(B{i});

end

imshow(img{1});

the problem is that it shows SOME of the images total black,but of course they are not black. the rest images are ok.

Also,if the images are .bmp then there is no problem.

Any idea why this happens?

Answer 1

[Image Analyst]

I'm not sure it's being in the list that's the problem. Can you just call imread() and imshow() and see them? If not, then the list is not the problem. Attach your "bad" images with the paper clip icon.

[alex]

Yes i can imread and imshow them properly.there is no problem.

And if i save the image as .bmp there is no problem too. this is the image.the letter l.

[alex]

Is it possible for this to be a bug of matlab? Because i did it again and i did see the image properly. I did it one more time but i saw the black image this time. I didn't change anything to the code.

[Image Analyst]

I doubt it. Does the PNG image have any transparent pixels in it?