Step 1 : Align.



Anabuilder is the easiest: load the anaglyph, align by hitting arrow keys and save .

StereoPhoto Maker does not load color anaglyphs ( a bit strange that a program does not load its own product ). Therefore a little workaround is used. The anaglyph is loaded as a stereopair: once as left side and again as right side, and then used to recreate the (full) color (red-cyan) anaglyph.
Using the keyboard arrow keys the realignment can be done, the result is copied to the clipboard and finaly imported in the GIMP.

Using the GIMP for this purpose is also possible ( see here ) but a bit lenghty because of its incompleted colorchannel treatment.

Step 2: Recolor



There are several tools to change color:

• Paint
• Color Balance
• Change hue
• Colorize

First we have to isolate area to be treated.
The free select tool is easy to use for well delineated areas (like in this example).

Some feathering may be applied to avoid leaking boarders.

It is a good idea to save your selection effort

• as a seperate channel (second from the bottom in the shown pulldown menu)
• by turning it into a path (bottom entry) which can be saved seperately (Path menu: Export path) and reused anytime (Import and convert to selection) .
  
  

Now comes the fun part: colorizing !

I chose a color that goes with the rest (blueish), is tone balanced, and is dark enough to remove the ghosting.

After deselecting the result can be verified.

All that is left to be done is to move the red-cyan color channels to their original positions.

Summary.

This recoloring is best suited for correcting realy local faults like f.e. red lipstift, white buttons on a dark shirt and vice versa, white shirt under a dark jacket, white hat on black hair...