artifacts created by using free transform?

LS
Posted By
Larry Samwells
Jan 18, 2005
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596
Replies
3
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Closed
Lately I’ve been noticing that I am seeing jagged edges in any pictures I have rotated using free transform. I’m not sure if this is from the free transform itself, or an unsharp mask I did beforehand, but has anyone else seen artifacts after free transform and what did you do about it?

Thanks,
Larry

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L
llutton
Jan 18, 2005
Lately I’ve been noticing that I am seeing jagged edges in any pictures I have rotated using free transform. I’m not sure if this is from the free transform itself, or an unsharp mask I did beforehand, but has anyone else seen artifacts after free transform and what did you do about it? Larry
I haven’t noticed. One thing you mentioned is you have used unsharp mask before you did the free transform. All material I have read says to do the unsharp mask last. Don’t do any more editing after unsharp mask. Try it and see if that could be the problem. Let us know.
Lynn
LS
Larry Samwells
Jan 18, 2005
"LLutton" wrote in message
Lately I’ve been noticing that I am seeing jagged edges in any pictures I have rotated using free transform. I’m not sure if this is from the free transform itself, or an unsharp mask I did beforehand, but has anyone
else
seen artifacts after free transform and what did you do about it? Larry
I haven’t noticed. One thing you mentioned is you have used unsharp mask before you did the free transform. All material I have read says to do
the
unsharp mask last. Don’t do any more editing after unsharp mask. Try it
and
see if that could be the problem. Let us know.
Lynn

I have just confirmed it. Sometimes I get these jagged edges whether or not the unsharp mask is applied before a free transform. The edges are difficult to see and, unfortunately, only show up well when an image is printed. I can see them on the monitor, but not without at least a 200% zoom.

My only guess is that when I do the free transform, I drag the image into the position I want and maybe the manual dragging is disturbing the picture dimensions slightly, which would produce the jagged effect. If I instead inputted the numeric value of rotation in the box, perhaps that would be the solution. However, I loose a lot of convenience that way when trying to match up images.

Right now, my advice would be to be very careful doing free transforms, especially by dragging, and immediately notice whether or not jagged edges appear upon zooming in to 200-300%.

Larry
M2
Michael 23
Jan 18, 2005
Larry – hold shift while you rotate, will snap to even numeric values (but limited to 1/8 -I think?- rotations)


Michael Evangelista
Southern Utah Web Design
www.suwebs.com

"Larry Samwells" wrote in message
"LLutton" wrote in message
Lately I’ve been noticing that I am seeing jagged edges in any pictures I
have rotated using free transform. I’m not sure if this is from the free
transform itself, or an unsharp mask I did beforehand, but has anyone
else
seen artifacts after free transform and what did you do about it? Larry
I haven’t noticed. One thing you mentioned is you have used unsharp mask before you did the free transform. All material I have read says to do
the
unsharp mask last. Don’t do any more editing after unsharp mask. Try it
and
see if that could be the problem. Let us know.
Lynn

I have just confirmed it. Sometimes I get these jagged edges whether or not
the unsharp mask is applied before a free transform. The edges are difficult to see and, unfortunately, only show up well when an image is printed. I can see them on the monitor, but not without at least a 200% zoom.

My only guess is that when I do the free transform, I drag the image into the position I want and maybe the manual dragging is disturbing the picture
dimensions slightly, which would produce the jagged effect. If I instead inputted the numeric value of rotation in the box, perhaps that would be the
solution. However, I loose a lot of convenience that way when trying to match up images.

Right now, my advice would be to be very careful doing free transforms, especially by dragging, and immediately notice whether or not jagged edges appear upon zooming in to 200-300%.

Larry

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