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View Full Version : Rejection question


cometv
08-28-2004, 08:54 AM
This shot was knocked down for "too much compression".

http://www.railpictures.net/viewreject.php?id=43871

Can anyone explain this further?? Thanks.

C40dash8
08-28-2004, 01:59 PM
I like it. But as a former Arkansan, maybe my "MP bias" is showing!

Guilford350
08-28-2004, 06:47 PM
The image looks a little too sharp. If you have Photoshop, try using the unsharp mask.

cometv
08-28-2004, 06:59 PM
So I oversharpened it, maybe? I usually give a scan one touch of "sharpen edges" in PS. When the screeners say "too much compression" does that mean the file is too small?

Here's another: http://www.railpictures.net/viewreject.php?id=44014

Same thing, "too much compression".

Mind you, I'm not crying here, just trying to figure out this compression thing. My entire collection consists of Kodachromes and they're tough to scan properly.

Thanks for the input, guys.

Donny

Chris Starnes
08-29-2004, 01:49 AM
Compression can mean that too much JPEG compression was used when saving the photo. As was pointed out already, I think this photo was oversharpened then the use of too much compression created the grainy/distorted look.

I would try a re-scan and a little less agressive post-scan work.

Hope this helps

boxtop
01-25-2005, 06:39 PM
"The image looks a little too sharp. If you have Photoshop, try using the unsharp mask."

Generally I use unsharp mask to sharpen photos, it doesnt really "un-sharpen" as its name would imply.

Instead, try starting over from your camera jpeg or raw file, and when you reach your "save as" step from your image editor, ease off on the JPEG compression.

Guilford350
01-25-2005, 09:54 PM
Despite the name, you can still reduce the amount of oversharpening or compression on an image using the unsharp mask. Not to a great extent but enough to get the image looking somewhat normal again.