yellow dots - DPChallenge Forums

Canon EF-S 55-250mm f/4-5.6 IS

12/15/2004 03:31:42 PM · #1

alright, i have been waiting to ask this for a while now...

my submission for the yellow challange was this,

now, on my monitor, i cannot see any yellow dots to the right of the shot, however on a friends screen, i can see quite a few.

is this a monitor callibration issue?...what should i do?

Canon EOS-60D

12/15/2004 03:35:19 PM · #2

I see them... I had a similar problem with my yellow entry. When I desaturated all the other colors, leaving only the yellow, there were a few things that still had color left in them because they were primarily yellow as well. I'd guess that the wall had some yellow in it and that's why it's still there. Of course, I could be way off. It's been known to happen before. :o)

jbsmithana

Nikon D300

Nikon AF-S DX Zoom-Nikkor 12-24mm f/4.0G IF-ED

12/15/2004 03:42:20 PM · #3

I also see it. I think Laurie is correct. My guess would be that the wall had some faint yellow in it that only showed up when you desaturated. On the monitor I'm on now it is very faint so it is definately monitor specific.

scottwilson

Canon EOS-350D Rebel XT

Canon EF 28mm f/2.8

12/15/2004 03:48:17 PM · #4

This can also be caused by noise on the blue channel. If you have the original photo you might try noise filtering the image first, making sure to filter color noise a lot, and then do your color processing.

12/15/2004 03:48:55 PM · #5

thank you for your responses...i guess ill look into monitor calibration stuff

KaDi

Canon EF-S 18-55mm f/3.5-5.6

12/15/2004 03:54:09 PM · #6

Originally posted by scottwilson:

Wish I had known about this. Can't wait to run home and try it. Several people commented that increased saturation on the yellow would have helped my entry, but I noticed yellow flecks in the ice cubes and had to desaturate until the lemon was closer to its normal, pale hue.

My entry:

drz01

Pentax K50

Pentax SMC DA 18-55mm f3.5-5.6 AL WR

12/15/2004 04:35:05 PM · #7

I do not know how you separate colour from b&W but in PSP you make a duplacate of your original image convert it to greyscale/b&w then copy this new b&w/greyscale image, then you paste it as a new layer onto your original image. After this you use your erase tool to subtract part of the new layer letting the original image show through (showing colour) this way you can work at a more presice levle even down to one pixel. The use of a pen tablet makes this even easier than a mouse.

Message edited by author 2004-12-15 16:36:38.

Nikon AF Nikkor 50mm f/1.4D

12/15/2004 04:36:15 PM · #8

Originally posted by drz01:

I do not know how you separate colour from b&W but in PSP you make a duplacate of your original image convert it to greyscale/b&w then copy this new b&w/greyscale image and paste it as a new layer onto your original image. after this you use your erase tool to subtract part of the new layer to let the original image show through (showing colour) this way you can work at a more presice levle even down to one pixel.

...is that allowed in basic editing?

fotodude

Nikon D70

12/15/2004 05:53:41 PM · #9

Originally posted by maxj:

Originally posted by drz01:
I do not know how you separate colour from b&W but in PSP you make a duplacate of your original image convert it to greyscale/b&w then copy this new b&w/greyscale image and paste it as a new layer onto your original image. after this you use your erase tool to subtract part of the new layer to let the original image show through (showing colour) this way you can work at a more presice levle even down to one pixel.

...is that allowed in basic editing?

i don't think so but i could be wrong.....i would think that would be the same as a slective edit which is not allowed but i could be wrong i think it is clearly stated that anything u do to the image must be done to the whole image.

also i've always done it by (and i know this is not allowed) outlining what ever i want to be color (with the pen tool) then taking and making it a slection under the path (menu) then once it is a slection i take and go under the select menu and go to inverse, then i make a layer and desat. it or u can do everything up to the point of the whole inverse thing and keep making what ever u want as color a layer by cutting it then when u are done pasting it back it.

i may be doing way to muchbut it really looks good aft. 2hrs. hard work you can evean split pixels(color on 1/2 desat. on the other 1/2)

_brando_

fotodude

Nikon D70

Nikon AF Nikkor 50mm f/1.4D

12/15/2004 06:03:49 PM · #10

so wait is any slective desat. allowed in basic and how DO you do it. according to this section in the rules it isn't.-

"Post-shot Adjustments may be made to your image in a photo editing program, so long as the modification is applied to the whole image. This includes levels, conversion to black and white, hue/saturation"