XnView Software

Hi all

I think I may have found the answer to this mystery:

My images are 4000 x 3000 and so are perfect multiples of 8 pixels. so that shouldn't of been a problem for the lossless operations. What I think may be going on is something called the Huffman codes. Huffman coding is an encoding ...

One possible explanation: a lossless operation writes directly to file. Saving it afterwards (according to quality settings) would be an unnecessary step.
The lossless operation writes directly to file yes, and when i examine the file size afterwards it's 1MB smaller. I happened to notice too that ...

I noticed that when i took an original 7MB JPEG and applied a simple lossless operation like flip 180 degrees, the resulting file size after the lossless save is actually about 1MB lower than the original. Can i ask why it would be so much lower if the operation is lossless?

I tried it on other ...