 |
|
Welcome to RetouchPRO, the web community for retouchers. You are currently viewing as an unregistered guest which gives you limited access. Registration is fast, simple and absolutely free so please, join RetouchPRO today! If you have any problems with the registration process or your account login, please contact us. If you've forgotten your password, click here. |
| |||||||
| Register | Blogs | FAQ | Search | Today's Posts | Mark Forums Read |
| Software Photoshop, Paintshop Pro, Painter, etc., and all their various plugins. Of course, you can also discuss all other programs, as well. |
 |
| | LinkBack | Thread Tools |
|
#1
01-28-2007, 07:48 PM
| ||||
| ||||
| Strange B/W color desaturation Hi,pls help..thks  1. Left image is RGB with Hue/Saturation adjustment layer - Sat 0% 2. Right image is CMYK with Hue/Saturation adjustment layer - Sat 0% Qn: Why is there this reddish tint? http://i176.photobucket.com/albums/w...soon/color.jpg Last edited by saberlancer : 01-28-2007 at 07:59 PM.            |
|
#3
01-28-2007, 09:07 PM
| ||||
| ||||
| Re: Strange B/W color desaturation I just found that clicking 'colorize'does remove the tint but its a bad conversion. |
|
#4
01-28-2007, 09:24 PM
| ||||
| ||||
| Re: Strange B/W color desaturation ran a test and this is what i found ... with desaturate on the hue-sat layer set to 0 the cmy numbers are the same when the eyedropper is moved around the image, when a solid color adjustment layer added and it's color set to black and the blend mode of this layer is set to color - the cmy numbers are not the same when the image is sampled. I am guessing this is but because the color profile is compensating for how the cyan, yellow and magenta inks need a different amount of density to appear grey when printed on a press. Just guessing but that is my vote  -Roger |
|
#5
01-28-2007, 09:39 PM
| ||||
| ||||
| Re: Strange B/W color desaturation Thks roger, And I found that using a white solid and setting to 'color' blending produces the red tint effect I mentioned earlier!... Not that I understand whats going on... But it seems like using a black solid layer set to 'color' is the most flexible method if I want to a 'Grayscale CMYK image that is set by using just a layer'? |
|
#6
01-28-2007, 09:51 PM
| |||
| |||
| Re: Strange B/W color desaturation When you desaturate in RGB, the 3 channels are equalized and youn get a pure grayscale result. In CMYK, the Cyan, Magenta and Yellow channels are also equalised while the Black channel is adjusted to ensure correct lightness is maintained. If you run your eyedropper around the image you will see that the CMY values are all equal. However, that will not produce gray because in the CMYK model, equal amounts of ink do not equal gray or black. So if you are looking to have a grayscale image, you should use one of the 10 ways in RGB or LAB to achieve the result. Regards, Murray |
|
« Previous Thread
|
Next Thread »
| Thread Tools | |
| |
Similar Threads | ||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Help with B/W portrait | ProAc_Fan | Image Help | 16 | 09-15-2006 09:27 PM |
| Scan b/w in color? | fredley | Photo Retouching | 4 | 07-15-2004 08:56 PM |
| B/W to Color....how to enhance white ? | mahjohn | Photoshop Help | 2 | 10-20-2003 05:51 AM |
| Color or B/W | thomasgeorge | Work/Jobs | 3 | 09-07-2002 10:24 PM |
| Strange XP cable modem behavior | jeaniesa | Software | 10 | 08-25-2002 08:32 AM |
All times are GMT -6. The time now is 10:45 PM.
