Set contone colour for selected region of bitmap

[PhilM]

Using Masks:
Start with a photo selected
* Change to Region Painter tool
* Paint regions you want to change
* Change to Selector tool
* Clone (this clones only the areas of the photo covered by the mask regions)
* Apply contone colours

(The general model is that when you're in one of the mask or region tools commands like Clone will _affect_ the mask or region that you're drawing and when you're not in one of the mask or region tools commands _use_ the mask or region that is present. Unfortunately the UI doesn't make this very clear.)

Phil

[DD]

Phil.
Thanks that method is quicker AND I've learned something important about regions/masks.

Gary.
I also had a go at shapes with transparency as that would be quick too but I couldn't see a transparency mode that would change "underneath" black to a given colour ?

Again thanks to all.

Dave D

[DD]

Just played some more with transparency...

Cover areas with a red shape and then apply 0% "Colour dodge" or 0% "Screen bleach" to make "underneath" black go red.

So thanks Gary, that's the easiest method, and you can move and reshape the transparent red objects.

[DD]

Just thought I'd share:

Reading again what Phil said about the region tool and clone...

I have now learnt that clone will clone the regions if the region tool is selected.
But that clone will clone the content of the regions if the region tool is not selected.

I also note that with the region tool selected I can nudge the selected regions with the arrow keys.

[Acorn]

Why not just an a sigma from a font, and colour red and drop on top of the image?

Go further, use Latex, and embed code like this into a body Placeholder:

\[\frac{\partial \dot{v}}{\partial t}=l(x,z)[\frac{\partial }{\partial {x}}(\color{red} {\sigma}_{xy}) +\frac{\partial }{\partial {z}}(\color{red} {\sigma}_{zy})] 
\]
<script type="text/javascript" src="http://www.hostmath.com/Math/MathJax.js?config=OK"></script>

Acorn