| Author | Thread |
|
|
06/13/2006 01:29:54 PM · #1 |
I've read the basic rules and searched the forums and I can't find that this would be illegal under basic rules.
If I were to select only the blue channel of an image and blur it (to reduce noise in a sky) would that be legal under basic rules.
It is applied to the whole image and follows the blending mode rules. It's only applied to a specific channel (blue).
|
|
|
|
06/13/2006 01:33:26 PM · #2 |
| thats a really good question. i dont know the answer but im interested in what it will be because soemthing like that could have helped me out a few times before. It actually could help with my current framed entry. Hope you get a definitive answer. :) |
|
|
|
06/13/2006 01:34:00 PM · #3 |
| That sounds legal to me. Overall Gaussian Blur is allowed, and what you describe is no more selective than desaturating a color channel. |
|
|
|
06/13/2006 01:37:11 PM · #4 |
Originally posted by scalvert:
That sounds legal to me. Overall Gaussian Blur is allowed, and what you describe is no more selective than desaturating a color channel. |
That's what I was thinking too. Thanks.
|
|
|
|
06/13/2006 01:37:16 PM · #5 |
equiv. legality to changing to LAB mode & sharpening only the Lightness channel
|
|
|
|
06/13/2006 01:39:02 PM · #6 |
Originally posted by ralphnev:
equiv. legality to changing to LAB mode & sharpening only the Lightness channel |
I'm pretty sure LAB mode is expressedly forbidden in Basic.
|
|
|
|
06/13/2006 01:44:09 PM · #7 |
I haven't tried to do this yet, but it seems to me that in order to blur the blue channel you'd have to make a LAYER out of it, and that would be illegal in basic... If anyone has a way to blur the blue (or any) channel without setting it up as a layer in the layers palette, then obviously I'm wrong. Does such a method exist?
R.
|
|
|
|
06/13/2006 01:45:34 PM · #8 |
Originally posted by DrAchoo:
I'm pretty sure LAB mode is expressedly forbidden in Basic. |
Why do you say that? I can convert to Grayscale mode or from 16bit to 8bit, so what's the difference? |
|
|
|
06/13/2006 01:45:44 PM · #9 |
Originally posted by DrAchoo:
Originally posted by ralphnev:
equiv. legality to changing to LAB mode & sharpening only the Lightness channel |
I'm pretty sure LAB mode is expressedly forbidden in Basic. |
Nope, LAB mode is legal. It's just another color space, and the Basic rules say nothing about color space conversions.
Haha too slow, Shannon beat me to it!
Message edited by author 2006-06-13 13:47:09. |
|
|
|
06/13/2006 01:46:48 PM · #10 |
Originally posted by Bear_Music:
I haven't tried to do this yet, but it seems to me that in order to blur the blue channel you'd have to make a LAYER out of it, and that would be illegal in basic... If anyone has a way to blur the blue (or any) channel without setting it up as a layer in the layers palette, then obviously I'm wrong. Does such a method exist?
R. |
It's legal. Just go to the channels tab, select only the channel you want to operate on (image appears grayscale) and perform the desired operation. |
|
|
|
06/13/2006 01:47:14 PM · #11 |
Originally posted by Bear_Music:
I haven't tried to do this yet, but it seems to me that in order to blur the blue channel you'd have to make a LAYER out of it, and that would be illegal in basic... |
You can blur a color channel without creating a new layer. I just tried it.
Haha, Kirbic beat me to it. ;-P
Message edited by author 2006-06-13 13:47:52. |
|
|
|
06/13/2006 01:49:35 PM · #12 |
Originally posted by Bear_Music:
I haven't tried to do this yet, but it seems to me that in order to blur the blue channel you'd have to make a LAYER out of it, and that would be illegal in basic... If anyone has a way to blur the blue (or any) channel without setting it up as a layer in the layers palette, then obviously I'm wrong. Does such a method exist?
R. |
Bear, as long as the image is a single layer image. You can individually select channels and use a handful of filters on them.
ETA: creates some wild/wierd effects if ya overdo it :-)
Message edited by author 2006-06-13 13:50:50.
|
|
|
|
06/13/2006 01:53:49 PM · #13 |
Originally posted by kirbic:
Originally posted by Bear_Music:
I haven't tried to do this yet, but it seems to me that in order to blur the blue channel you'd have to make a LAYER out of it, and that would be illegal in basic... If anyone has a way to blur the blue (or any) channel without setting it up as a layer in the layers palette, then obviously I'm wrong. Does such a method exist?
R. |
It's legal. Just go to the channels tab, select only the channel you want to operate on (image appears grayscale) and perform the desired operation. |
Learn something new every day. Thanks :-) That's gonna come in handy...
R.
Edit to add; I should be crediting fotomann, I just happened to answer Kirbic's post.
Message edited by author 2006-06-13 13:54:32.
|
|
|
|
06/13/2006 02:03:52 PM · #14 |
Originally posted by Bear_Music:
Learn something new every day. Thanks :-) That's gonna come in handy...
|
Yes indeed, that will be one handy tool. I just HAD TO ASK :-)
|
|
|
|
06/13/2006 03:03:15 PM · #15 |
Man, I could have sworn I saw a pic DQ'd in the past for using LAB mode. Well, live and learn.
|
|
Home -
Challenges -
Community -
League -
Photos -
Cameras -
Lenses -
Learn -
Help -
Terms of Use -
Privacy -
Top ^
DPChallenge, and website content and design, Copyright © 2001-2025 Challenging Technologies, LLC.
All digital photo copyrights belong to the photographers and may not be used without permission.
Current Server Time: 09/06/2025 09:01:03 AM EDT.
