Colorize specific portions of B&W image

Starting with a scanned 35mm B&W image, how would you colorize only a

specific portion of the image, using Photoshop 7.0?? Would that

workflow change if you were to scan from Panchromatic vs. Chromogenic

film?

 

I'll be using a Canon FS4000 scanner (just ordered it) and my desired

end state is to be able to print an 8x10.

 

I know there are a few ways to do this, and yes, I've done my

research, but I wanted to get perspective from folks on this forum.

The easiest way is to start with a color image and desaturate the color in all areas you want to be B&W. usually the best way to do this is to build masks in different layers.

<i>I know there are a few ways to do this, and yes, I've done my research, but I wanted to get perspective from folks on this forum. </i><p>

Well, you did the right thing. I use the Hue/Saturation+Colorize technique. What I do is to create a layer for each color and paint in the <b>layer mask</b> (well worth stressing). This is reversible and flexible, thus I never have to modify the <code>Background</code> layer. No difference between panchromatic, chromogenic, or even desaturated color stock; it's just the good old Colorize feature of the Hue/Saturation tool.

Create a duplicate layer, convert it to B&W using the technique you prefer. Then take the eraser tool and erase the color back in where you want it.

I would add to the layers tip above to use multiply blend mode on the layers and in some cases use those transparency range sliders in the layer properties so that it mostly affects a certain range rather than the entire thing.

Scan as B/W image, in photoshop go to Image - mode - RGB. Copy the layer, preserving the original. Create a mask for your first color using Quick mask then convert to selection. Go to Selection - Save selection and name this whatever you want. Add New layer, go to selection - load selection and paint your color choice, then deselect. At the top of layers pallet in blending modes, (it says "normal") click the arrow and from the list select "Color", then adjust the opacity of this layer. Do each of these steps for each color, when done flatten image.<div></div>