how to reduce bits per pixel in an image?

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Anusha
Anusha on 26 Feb 2014
Commented: Image Analyst on 27 Feb 2014
If my image in the format of png.. i need to compress this image..so image bit per pixel will be reduced? how this is possible

Answers (2)

Nitin
Nitin on 26 Feb 2014
Check the imresize function in Matlab

Image Analyst
Image Analyst on 26 Feb 2014
Using imwrite to create a PNG image does the compression for you. Why do you think you need to do anything additional?
  2 Comments
Image Analyst
Image Analyst on 27 Feb 2014
What GIF image? Images only have a format once they're saved onto disk. Once they're in MATLAB, they're simply an array of numbers. If you use imread() it uncompressed them. They're no longer compressed - it's the full, original array again. The only way to get the compressed data out is if you use fread() but if you did that it's not in a displayable form.

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