Digital photography filters

[oasisvader]

Does anyone know how to filter out all colors except one? i.e. I want to make a portrait black and white, but I still the the eyes to be blue. Thanks much for any help.

 

[Tiberius]

You do that in postprocessing with a program like Photoshop or the GIMP. Two layers - one Black and White on top of one Color, then erase away the areas you want colored.

 

[rmh159]

Mr. Tiberius means Layers but he's right on. That's how you do, pretty easy.

... Two levels - one Black and White on top of one Color, then erase away the areas you want colored.

 

[oasisvader]

Thanks alot!

 

[Big Mike]

A better way than actually erasing the top layer, is to use a layer mask. A layer mask will give you the same result...but you can 'paint' in on or off, which makes it easy to fine tune etc.

 

[oasisvader]

Thanks, I'll try both ways.

 

[Tolyk]

I always just use the magic wand to select the colour I want then inverse my selection and use the channel mixer to make it B&W.. But the layer technique sounds nifty, I'll have to try it next time