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AutoColorize_FlavorB_2_02.scm
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; Auto colorize image into random number of colors of random hues
; author: Tin Tran
; date: 2015
; Comments directed to http://gimpchat.com or http://gimpscripts.com
;
; License: GPLv3
; 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 3 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.
;
; To view a copy of the GNU General Public License
; visit: http://www.gnu.org/licenses/gpl.html
;
;
; ------------
;| Change Log |
; ------------
; Rel 0.01 - Initial Release
;
(define (script-fu-auto-colorize-b image layer
hatches
)
(let* (
(color-map 0)
(colors 0)
(image-width)
(image-height)
;(R 0.2126) ;constants for calculating luminance
;(G 0.7152)
;(B 0.0722)
;(0.299*R + 0.587*G + 0.114*B)
;(R 0.299)
;(G 0.587)
;(B 0.114)
;sqrt( 0.299*R^2 + 0.587*G^2 + 0.114*B^2 )
(Re 0.299)
(Gr 0.587)
(Bl 0.114)
(r 1) ;randomly generated r g b values
(g 2)
(b 3)
(l-original 0.1) ;luminance original
(l-new 0.0)
(red 0)
(green 0)
(blue 0)
(y 0)
(hue)
(floating 0)
(difference)
(counter 0)
)
;(gimp-image-undo-disable image); DN = NO UNDO
(gimp-image-undo-group-start image) ;undo-group in one step
;convert to indexed
(set! image-width (car (gimp-image-width image)))
(set! image-height (car (gimp-image-height image)))
(gimp-image-convert-indexed image CONVERT-DITHER-NONE CONVERT-PALETTE-GENERATE hatches FALSE TRUE "unused palette name") ;; was F F "name"
;grabs color map
(set! colors (vector->list (cadr (gimp-image-get-colormap image))))
(gimp-image-convert-rgb image) ;converts it to rgb before we call hatch loop
(set! floating (car (gimp-layer-new image image-width image-height
RGBA-IMAGE "Colorize" 100 LAYER-MODE-NORMAL))) ;creates layer
;;insert above current layer
;;(gimp-image-insert-layer image new-layer 0 (car (gimp-image-get-item-position image layer)))
(gimp-image-insert-layer image floating 0 0) ;;was 0 0
(gimp-drawable-edit-fill floating FILL-TRANSPARENT) ;; added by karlhof26
;set that layer to be active layer
(set! y hatches) ;loop hatches number of times
(srand (car (gettimeofday)))
(gimp-context-set-sample-threshold-int 5)
(gimp-context-set-sample-criterion 0)
(while (> y 0)
;do work here
(set! red (car colors))
(set! green (cadr colors))
(set! blue (caddr colors))
;select each color
(gimp-image-set-active-layer image layer)
(gimp-image-select-color image CHANNEL-OP-REPLACE layer (list red green blue))
;(set! hue (rand 360))
;(gimp-colorize layer hue 100 0)
;(gimp-edit-copy layer)
;(set! floating (car(gimp-edit-paste layer TRUE)))
;(gimp-floating-sel-to-layer floating)
;(gimp-image-set-active-layer image floating)
(gimp-image-set-active-layer image floating)
;;(set! hue (rand 360))
;;(gimp-colorize floating hue 100 0)
;;sqrt( 0.299*R^2 + 0.587*G^2 + 0.114*B^2 )
(set! l-original (sqrt (+ (pow (* red Re) 2) (+ (pow (* green Gr) 2) (pow (* blue Bl) 2)))))
(set! difference 10)
(set! counter 0)
;just randomly pick a color until we find a color of similar luminance
;absolutely not the ideal way of getting a color
(while (and (> difference 1.5) (< counter 220)) ; was 1 was 1.5
(set! r (- (rand 254) 1)) ; was 255; was 256-1
(set! g (rand 255))
(set! b (rand 255))
(set! l-new (sqrt (+ (+ (pow (* r Re) 2) (+ (pow (* g Gr) 2)) (pow (* b Bl) 2)))))
(set! difference (abs (- l-new l-original)))
;(gimp-message "Picking....")
;(gimp-message (number->string (rand 10)))
(set! counter (+ counter 1))
)
;(script-fu-colorize image floating (list r g b) 100)
;(gimp-message (number->string difference))
(gimp-image-set-active-layer image layer)
(gimp-image-select-color image CHANNEL-OP-REPLACE layer (list red green blue))
(gimp-image-set-active-layer image floating)
(gimp-context-set-foreground (list r g b))
(gimp-drawable-edit-fill floating FILL-FOREGROUND)
(if (> y 1) ;if y is still valid we set colors to the next colors
(begin
(set! colors (cdddr colors))
)
(begin ;else
)
)
;loop control
(set! y (- y 1))
);end of while
(gimp-selection-none image)
;(gimp-image-undo-enable image) ;DN = NO UNDO
(gimp-image-undo-group-end image) ;undo group in one step
(gimp-displays-flush)
)
) ;end of define
(script-fu-register
"script-fu-auto-colorize-b" ;function name
"<Image>/Script-Fu2/Create from Image/Auto Colorize Flavor B" ;menu register
"Randomly colorize image with specified number of colors." ;description
"Tin Tran" ;author name
"copyright info and description" ;copyright info or description
"2015" ;date
"RGB*, GRAY*" ;mode
SF-IMAGE "Image" 0
SF-DRAWABLE "Layer" 0
SF-ADJUSTMENT "Number of colors" '(5 2 255 1 10 0 0)
)
;end of script