how much can a photo (any format) be compressed while still being lossless.

Question

anonymous · Answer

I think there is no specific answer .... it depends on the format and the photo (its size and dimensions )

llort · Answer

right now it is a 3072x2304 JPEG

anonymous · Answer

I cant give you a specific answer ... you should try

llort · Answer

what shall I try?

anonymous · Answer

There are a variety of compression formats which can be lossless. There isn't an absolute compression ratio.

anonymous · Answer

Hey if you are talking about compressing pictures u can download the software "Photo Pos Pro" on download.cnet.com

anonymous · Answer

If you'd an example of a lossless compression algorithm look at huffman coding.

rsmith6559 · Answer

JPEG is a lossy format.  It needs to be a TIFF to be lossless.  My JOBS folders generally compress backup at about 1.3:1.  Not maximal compression, but that's probably offset by Illustator files.

Try running zip, gzip, bzip2 on the file[s] with the maximum compression and see what you get.

anonymous · Answer

There is no specific answer as others have said.  What it primarily depends on is the amount of fine detail on the picture: there more there is, the less compression is possible.  

The JPEG standard allows either lossy or lossless compression.  It depends on the software used to do the compression whether the lossless option is made available.