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DPChallenge Forums >> Tips, Tricks, and Q&A >> Legal Adjustments?
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05/08/2004 02:47:09 AM · #1
I'm a new member and have a couple questions on what is ok as far as "editing". Neither the basic or advanced editing rules say anything about using levels and color balance. Is that ok or is it against the rules? Also, what about cropping, can you use the crop tool to straighten your lines if you are slightly off?
05/08/2004 02:55:17 AM · #2
Levels and colour balance can be used as long as applied to the entire image. If used in an adjustment layer must also be applied in normal blending mode.

Cropping to straighten is also acceptable. Though I don't think cropping to correct converging lines is acceptable.
05/08/2004 03:01:58 AM · #3
Thanks for clearing that up.
05/08/2004 03:18:48 AM · #4
Make sure on the Basic challenges you don't use any tool that will select individual pixels like the magic wand, lasso, smudge, dodge and burn, eyedropper, cloning, etc.

Basic editing- Levels can be used, but not the eyedropper(selected white, gray, black points) feature in manual level.

Message edited by author 2004-05-08 03:19:37.
05/08/2004 06:58:59 AM · #5
Originally posted by faidoi:

Basic editing- Levels can be used, but not the eyedropper(selected white, gray, black points) feature in manual level.


Why not the eyedropper tool in manual levels ?

The basic editing rules in no way mention that it is forbidden.

And all the eyedropper tool does is set the white point (or black/grey point respectively), which is the point used as reference for the auto levels shift in each of the separate RGB colors.

It is basically the same as applying auto levels but then against a chosen reference point, instead of shifting all levels up to the edge of the histogram with auto levels.

Another way of achieving the same effect as using the eyedropper tool is manually applying levels to each color and checking with the info panel whether the chosen point has reached the desired value.

The eyedropper tool on levels does not do any selective editing to specific pixels only. And since the rules don't exclude it, I don't understand why you make the statement here.

p.s. I don't use it normally, I do things manually, but I still feel this requires clarification.
05/08/2004 07:15:02 AM · #6
Basic rules: Levels and color balance are permitted so long as they are applied to the entire image. No use of selection tools (magic wand, marquee, lasso, etc) is permitted. The use of the eyedropper within levels is permitted. The eyedropper does not select an area for selective editing, all it does is identify a specific color you want to set as your white, grey, or black point. Rotation of your image is permitted (I think this is what you meant about straightening your image), as is selecting a rectangular, non-feathered, non-anti-aliased area for cropping.

Advanced rules: Levels and color balance are permitted, cropping, whether to straighten or to correct converging lines, is acceptable. You may apply any edit either uniformly to the entire image or selectively as you see fit. Remember that the Advanced Rules were written to allow more freedom of editing, but that this is first and foremost a photography contest, not a digital art contest. The rules will be enforced with that in mind.

-Terry
05/10/2004 08:45:37 PM · #7
just curious about another rule in basic editing, while converting to black and white using channel mixer with monochrome, I end up using constant with an image looking inverse...actually if I click on inverse it makes it look proper again; anyway is inverting an image into a negative type look allowed in basic editing?

Message edited by author 2004-05-10 20:45:53.
05/10/2004 08:55:53 PM · #8
Originally posted by ericsuth:

just curious about another rule in basic editing, while converting to black and white using channel mixer with monochrome, I end up using constant with an image looking inverse...actually if I click on inverse it makes it look proper again; anyway is inverting an image into a negative type look allowed in basic editing?


Yes. You can achieve the effect using curves, by dragging the curve so it runs from upper right to lower left, rather than from lower right to upper left. Curves adjustment is legal in basic editing, as long as it is used on the entire image.
You can achieve some really strange and/or beautiful efects with radical adjustments of curves, but be prepared for the voters' reaction, which will not often be entirely positive. this image...

used color inversion to great effect, IMO, but as you can see got completley hammered by the voters.
05/10/2004 10:33:12 PM · #9
Originally posted by kirbic:

You can achieve some really strange and/or beautiful efects with radical adjustments of curves, but be prepared for the voters' reaction, which will not often be entirely positive. this image...

used color inversion to great effect, IMO, but as you can see got completley hammered by the voters.

These too were made with Curves too and suffered a similar fate. Try dragging different parts of the curve up and down, for example into the shape of a "W" or a "U"


Message edited by author 2004-05-10 22:34:28.
05/10/2004 10:47:09 PM · #10
thanks for the ideas...actually, i noticed most of the examples are of inverted color shots. Specifically I was looking at inverting a black and white which I feel has a much more grounded feel. imho flipping only two colors still allows the viewer to hold on to reality much more than when viewing inverted color shots.
05/10/2004 10:49:29 PM · #11
Mine aren't "inverted" though -- they have many adjustments in different directions ... usually a straight inversion doesn't go over that well either unless it really suits the subject.
05/10/2004 10:50:16 PM · #12
Originally posted by ericsuth:

just curious about another rule in basic editing, while converting to black and white using channel mixer with monochrome, I end up using constant with an image looking inverse...actually if I click on inverse it makes it look proper again; anyway is inverting an image into a negative type look allowed in basic editing?


It is legal, but I don't recall ever seeing it score well.

-Terry
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