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GIMPで画像一括変換

Last updated at Posted at 2014-01-20

フォルダに存在する全ての画像に対して、同じ処理を適用したいというのはよくあります。
GIMPであれば、そのような場合にスクリプトで一括処理を行うことができます。

Windowsの場合、スクリプトは以下のフォルダに格納することで使用可能です。
`C:\Program Files\GIMP 2\share\gimp\2.0\scripts

格納するとメニューから選択できるようになります。
gimp_scriptfu_image.png

以下のコードは、指定されたフォルダの画像を全て水平反転するものです。

script-fu-flip-horizontal.scm
; script-fu-flip-horizontal.scm
; by appin

; Version 1.0 (20130702)

; Description
;
; Script to flip images horizontally
;

(define (script-fu-flip-horizontal inDir inLoadType outDir)
  (let*
    (
      (varLoadStr "")
        (varFileList 0)
    )
    (set! varLoadStr
      (cond 
        (( equal? inLoadType 0 ) ".jpg" )
        (( equal? inLoadType 1 ) ".bmp" )
        (( equal? inLoadType 2 ) ".png" )
        (( equal? inLoadType 3 ) ".gif" )
      )
    )
    (set! varFileList (cadr (file-glob (string-append inDir "\\*" varLoadStr)  1)))
        
    (while (not (null? varFileList))
      (let* 
        ((filename (car varFileList))
          (short_filename (substring filename (+ (string-length inDir) 1) (string-length filename)))
          (image (car (gimp-file-load RUN-NONINTERACTIVE filename filename)))
          (drawable (car (gimp-image-get-active-layer image)))
          ;保存ファイル名の先頭に"r_"を追加
          (newfilename (string-append outDir "\\" (string-append "r_" short_filename)))
        )
        ;水平反転処理
        (gimp-image-flip image ORIENTATION-HORIZONTAL)

        (gimp-file-save RUN-NONINTERACTIVE image drawable newfilename short_filename)
        (gimp-image-delete image)
      )
      (set! varFileList (cdr varFileList))
    )
    
    (gimp-patterns-refresh)
  )
)
  
(script-fu-register "script-fu-flip-horizontal"
  "<Image>/Script-Fu/Flip Images Horizontally..."
  "Flip all files horizontally."
  "appin"
  "appin"
  "July 2013"
  ""
  SF-DIRNAME    "Load from" ""
  SF-OPTION     "Load File Type" (list "jpg" "bmp" "png" "gif")
  SF-DIRNAME    "Save to"  ""
  
)

水平反転処理を別処理に変えることで、色々と使えると思います。

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