; The GIMP -- an image manipulation program
; Copyright (C) 1995 Spencer Kimball and Peter Mattis
; 
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.  
; 
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.
; 
; You should have received a copy of the GNU General Public License
; along with this program; if not, write to the Free Software
; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
;
;
; red-eye.scm   version 0.95   2002/10/06
;
; CHANGE-LOG:
; 0.95 - initial release
;
; Copyright (C) 2002 Martin Guldahl <mguldahl@xmission.com>
; 
;  
; Removes red eye

(define (script-fu-red-eye image
			   drawable
			   radius
			   threshold
			   red
			   green
			   blue)


  (let* ((select-bounds (gimp-drawable-mask-bounds drawable))
	 (x1 (cadr select-bounds))
         (y1 (caddr select-bounds))
         (x2 (cadr (cddr select-bounds)))
         (y2 (caddr (cddr select-bounds)))
	 (red-component 0)
	 (green-component 1)
	 (blue-component 2)
	 )

  (gimp-undo-push-group-start image)

; Select and view the green channel only as it has the best contrast
;  between the iris and pupil.
;    - Deselect the Red and Blue channels

  (gimp-image-set-component-active image red-component FALSE)
  (gimp-image-set-component-active image blue-component FALSE)

; Use the fuzzy select tool (select contiguous regions) to select the pupils
  (gimp-fuzzy-select
   drawable
   x1 y1
   threshold 0 TRUE TRUE radius FALSE
   )

; Reselect Red and Blue channels
  (gimp-image-set-component-active image red-component TRUE)
  (gimp-image-set-component-active image blue-component TRUE)

; Use the channel mixer to make selected area monochrome
  (plug-in-colors-channel-mixer
   ;;run_mode
   1
   image
   drawable
   ;;monochrome
   1
   (/ red 100) (/ green 100) (/ blue 100) 0 0 0  0 0 0
   )
  
  (gimp-selection-clear image)
  (gimp-undo-push-group-end image)
  (gimp-displays-flush)
  )
  )

(define (script-fu-red-eye-no-cm image
			   drawable
			   radius
			   threshold
			   )


  (let* ((select-bounds (gimp-drawable-mask-bounds drawable))
	 (x1 (cadr select-bounds))
         (y1 (caddr select-bounds))
         (x2 (cadr (cddr select-bounds)))
         (y2 (caddr (cddr select-bounds)))
	 (red-component 0)
	 (green-component 1)
	 (blue-component 2)
	 )

  (gimp-undo-push-group-start image)

; Select and view the green channel only as it has the best contrast
;  between the iris and pupil.
;    - Deselect the Red and Blue channels

  (gimp-image-set-component-active image red-component FALSE)
  (gimp-image-set-component-active image blue-component FALSE)

; Use the fuzzy select tool (select contiguous regions) to select the pupils
  (gimp-fuzzy-select
   drawable
   x1 y1
   threshold 0 TRUE TRUE radius FALSE
   )

; Reselect Red and Blue channels
  (gimp-image-set-component-active image red-component TRUE)
  (gimp-image-set-component-active image blue-component TRUE)

; Now desaturate the Red channel
  (gimp-image-set-component-active image red-component TRUE)
  (gimp-image-set-component-active image green-component FALSE)
  (gimp-image-set-component-active image blue-component FALSE)
  (gimp-desaturate drawable)
  (gimp-image-set-component-active image red-component TRUE)
  (gimp-image-set-component-active image green-component TRUE)
  (gimp-image-set-component-active image blue-component TRUE)

  (gimp-selection-clear image)
  (gimp-undo-push-group-end image)
  (gimp-displays-flush)
  )
  )

(script-fu-register "script-fu-red-eye"
		    _"<Image>/Script-Fu/Selection/Red Eye..."
		    "Removes red eye; given selection is seed.\nNeeds the channel-mixer plug-in."
		    "Martin Guldahl <mguldahl@xmission.com>"
		    "Martin Guldahl"
		    "2002/10/05"
		    "*"
		    SF-IMAGE "Image" 0
		    SF-DRAWABLE "Drawable" 0
		    SF-ADJUSTMENT _"Radius" '(8 0 100 .2 1 1 1)
		    SF-ADJUSTMENT _"Threshold" '(40 0 255 1 1 1 1)
		    SF-ADJUSTMENT _"Red" '(10 0 100 1 1 1 1)
		    SF-ADJUSTMENT _"Green" '(60 0 100 1 1 1 1)
		    SF-ADJUSTMENT _"Blue" '(30 0 100 1 1 1 1)
		    )

(script-fu-register "script-fu-red-eye-no-cm"
		    _"<Image>/Script-Fu/Selection/Red Eye Desaturate..."
		    "Removes red eye; given selection is seed."
		    "Martin Guldahl <mguldahl@xmission.com>"
		    "Martin Guldahl"
		    "2002/10/05"
		    "*"
		    SF-IMAGE "Image" 0
		    SF-DRAWABLE "Drawable" 0
		    SF-ADJUSTMENT _"Radius" '(8 0 100 .2 1 1 1)
		    SF-ADJUSTMENT _"Threshold" '(40 0 255 1 1 1 1)
		    )