[rogerg (Roger)]

I have made an interesting discovery, perhaps confirming something that I had long suspected...

I just saved an image as a JPG from Canon's Digital Photo Professional 2.0, at level 9 compression, resulting in an image 1000 pixels wide and 168kb in size.

I then openned the saved JPG in Photoshop 5.5 to resize it down a little to be under the IIS 150kb limit. I resized the JPG down to 900 pixels wide and saved it. Doing so the file ended up beign 209kb in size!

The file had decreased in pixel size but had increased in filesize! This seems to confirm (without extensive testing) that the following is true: Newer/smarter software is able to compress a JPG at the same compression ratio to a smaller filesize. Perhaps newer software utilises smarter algorithims?

I often see vast differences in what people manage to fit in to the 150k limit of IIS uploads for JPG's, I wonder if this is a factor as much as the compression ratio actually chosen.

Makes me wonder if it's the best reason yet for me to upgrade my version of PhotoShop.

Roger.