- This is the starting image:
The goal is to colorize it using semi-automatic colorization.
- Open the image.
- Change color space to YCbCr by clicking CSpace>YCbCr.
- Click Paint>Set F2 to Color and Mask.
- Press X to create new layer.
- Open any image that has some colors that you want to paint with.
- Left click on a color and press Enter.
- Press X to bring Lena to top layer.
- Press P to make cursor round paint cursor.
Use +/- keys to change radius.
- Paint a stroke in region for colorization by dragging cursor with right mouse button down.
This initially displays paint strokes in black, so you should press S to view the painted color.
You can erase by holding the middle mouse button down.
- Repeat by pressing X and starting at Step 6 or 7 until your image looks something like this:
Don't forget to paint eyeballs white because that doesn't show in the above image.
- Click Paint>Set F2 to AutoColor, leave default settings, and press F2.
The result should look something like this:
- Finished! But, you would likely want to do manual touchups at this stage, thusly:
- Remove mask by pressing M.
Status can be seen in menu bar.
- Make only the Cr and Cb channels active by pressing keypad 1.
Status can be seen in 3rd pane of status bar.
- Hold Control key down before and while engaging menu bar and click Basic>Set Image to Color.
"Color" should appear as last item in menu bar, otherwise, you haven't done it correctly and should read more detailed instructions in manual.
- Select a color as in Step 7 and paint.