/usr/share/gimp/2.0/scripts/jacobs-midtone-sharp.scm is in gimp-plugin-registry 5.20120621ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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; The GIMP -- an image manipulation program
; Copyright (C) 1995 Spencer Kimball and Peter Mattis
;
; Midtone Sharp script for GIMP 2.4
; Original author: Tim Jacobs <twjacobs@gmail.com>
;
; Tags: photo, sharpen
;
; Author statement: Sharpens the midtones of an image
;
;
; --------------------------------------------------------------------
; Distributed by Gimp FX Foundry project
; --------------------------------------------------------------------
; - Changelog -
; Last changed: 03/20/2005
;
; --------------------------------------------------------------------
;
; 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.
;
; You should have received a copy of the GNU General Public License
; along with this program. If not, see <http://www.gnu.org/licenses/>.
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(define (script-fu-midtone-sharp image
drawable
)
(define (floor x)
(- x (fmod x 1))
)
(define (interpolate run rise x)
(max (min (floor (* (/ rise run) x)) 255) 0)
)
; Initialize variables
(let*
(
(i 0)
(mask_opacity 50)
(num_bytes 256)
(thresh_1 85)
(thresh_2 116)
(thresh_3 140)
(thresh_4 171)
(thresh_5 256)
(value-curve (cons-array num_bytes 'byte))
(sharp-layer 0)
(sharp-mask 0)
)
(gimp-image-undo-group-start image)
; create TRC for sharp layer mask
(while (< i thresh_1)
(aset value-curve i 0)
(set! i (+ i 1))
)
(while (< i thresh_2)
(aset value-curve i (interpolate (- thresh_2 thresh_1) 255 (- i thresh_1)))
(set! i (+ i 1))
)
(while (< i thresh_3)
(aset value-curve i 255)
(set! i (+ i 1))
)
(while (< i thresh_4)
(aset value-curve i (interpolate (- thresh_4 thresh_3) -255 (- i thresh_3)))
(set! i (+ i 1))
)
(while (< i thresh_5)
(aset value-curve i 0)
(set! i (+ i 1))
)
; Create new layer and add to the image
(set! sharp-layer (car (gimp-layer-copy drawable 1)))
(gimp-image-add-layer image sharp-layer -1)
(gimp-drawable-set-name sharp-layer _"Sharp Mask")
; create mask layer
(set! sharp-mask (car (gimp-layer-create-mask sharp-layer ADD-COPY-MASK)))
(gimp-layer-add-mask sharp-layer sharp-mask)
(gimp-layer-set-opacity sharp-layer mask_opacity)
(gimp-layer-set-mode sharp-layer NORMAL-MODE)
; apply TRC to mask layer
(gimp-curves-explicit sharp-mask HISTOGRAM-VALUE num_bytes value-curve)
; apply unsharp mask to new layer
(plug-in-unsharp-mask 1 image sharp-layer 5.5 0.75 0)
; Cleanup
(gimp-image-undo-group-end image)
(gimp-displays-flush)
)
)
(script-fu-register "script-fu-midtone-sharp"
_"Midtone-Sharp image"
_"Sharpen the midtones of an image"
"twjacobs@gmail.com"
"Tim Jacobs"
"March 19, 2005"
""
SF-IMAGE "Image" 0
SF-DRAWABLE "Drawable" 0
)
(script-fu-menu-register "script-fu-midtone-sharp"
"<Image>/FX-Foundry/Photo/Enhancement")
|