I want to make a picture grayscale, but still retain the red. I’ve seen it done on pics posted here. The picture was taken in color.
Is there anyway to setup a selection tool that keeps an aspect ratio? Like 16:9 or 16:10 so I can take a picture and select it in a widescreen ratio so I can use it as my desktop picture without having to stretch it.
http://www.sxc.hu/forum.phtml?f=showtopic&n=8445
or
Select… Color Range… then select the color you want to keep, adjust fuzzyness to only keep that color… Click OK… Shift+F7 (select inverse)… Shift+CTRL+U (desaturate selection)… Done. Sometimes.
Check your Desktop dimensions, use Crop (just press c) tool in Photoshop, adjust the top settings for the Crop tool to match your desktop resolution (make sure you use numbers followed by “px” to denote actual pixel dimensions, not inches). You can ignore Resolution, as you’ll be using it on your desktop, not for print, and you’re setting it to exact pixel dimensions anyway. Select the area you want as your desktop. Press Enter. Done.
Thanks for the help. Played around with it and got it to work.
There is a faster way to do that. Well its not faster, but its more exact.
Take the picture you have, in the layer window right click on the picture and select duplicate layer. With that duplicate layer go to the top of the screen and select Image - Adjustments - Desaturate.
Now you have a totally black and white layer. Go back to the layer window and select “add vector mask”. Change the colors in your main toolbar to black and white. When you have black selected as you primary color you just take the pencil tool and color the picture where you want color. If you mess up, switch to white and color the picture where you want black and white.
To make it less obvious, use a slight feather on the pencil tool.
example
