How does JPEG compresses images?


Status
Not open for further replies.

Bean

New Member
Apr 16, 2002
781
0
0
www.pbase.com
#1
Do you know how does JPEG compression works and how it can manage to reduce the size of an image by 10 times and even beyond? Thanks!
 

mpenza

Senior Member
Jan 18, 2002
12,938
0
0
Singapore
www.instagram.com
#2
it uses fourier transform or something like that to reduce the file sizes.... have forgotten the exact way already.
 

Zerstorer

Senior Member
Jul 8, 2002
3,437
0
0
#4
Generally, it samples the picture in 8x8pixel blocks, applies Discrete Cosine Transform to it, quantizes the DCT values(significant data reduction) and then encodes it into codewords.

Exact specifics should be available on the web if you are really interested.
 

Status
Not open for further replies.
Top Bottom