how to convert multiple image of PNG to JPG using Matlab?

i already coding for one image. but now i need to convert 180images. Thank you

[venkata ravi vusa]

How can we do that by using loop instead of "IMWRITE" command in MATLAB

[Walter Roberson]

venkata ravi vusa: see the existing Answers, below, for links to the Frequently Asked Questions on how to loop over a series of files.

Answer 1

[Guillaume]

While it's certainly possible and not particularly hard to do it using matlab, there are standalone programs that can already do that at the push of a button (e.g. irfanview) or a simple command (e.g. imagemagick).

Note that converting to jpeg is not a good idea if you want to do processing on the images. jpeg is a lossy format, it will alter the values of the pixels of the image.

If you do want to do it with matlab see this FAQ.

Answer 2

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

Note: JPEG is a lossy file compression, and is not overly suitable for image analysis purposes as it blurs sharp lines, making it difficult to find boundaries. If you intend to do analysis on the files it is better to leave them as PNG.