Automate image cropping of scanned images

[pschild]

There will be cases in which multiple old photos are scanned as one image file. Maybe it's possible to detect and extract every single image and save it as own file.
GIMP and ImageMagick offer such functionality, but it's not obvious how to make it work with Node.js.

Some ideas and links:

A) ImageMagick
http://www.fmwconcepts.com/imagemagick/multicrop/index.php
http://www.fmwconcepts.com/imagemagick/index.php => Windows users

https://stackoverflow.com/questions/48557612/programmatically-divide-scanned-images-into-separate-images

Algorithm
http://www.sethanil.com/exploring-software/49-image_cropping
https://opensourceforu.com/2015/03/automate-the-cropping-of-photos-from-scanned-album-pages/

PHP Manual
http://php.net/manual/de/book.imagick.php

B) Scan Software
https://autosplitter.com/

C) GIMP Plugin
http://francoismalan.com/2013/01/how-to-batch-separate-crop-multiple-scanned-photos/

• Search for "calling your script via command line at the end of the scanning step"

GIMP CLI
GIMP CLI Batch Mode

[pschild]

The following command works with the script script_fu_BatchDivideScannedImages:

& "C:\Program Files\GIMP 2\bin\gimp-2.10.exe" -i -b '(script_fu_BatchDivideScannedIm
ages \"C:\\Users\\schild\\Desktop\\test\" 0 FALSE 0 10 TRUE TRUE 25 100 TRUE \"#FFFFFF\" 0 25 25 TRUE \"C:\\Users\\sc
hild\\Desktop\\test\" 0 0.8 \"Crop\" 1)'

To make it work with -i param, the following lines were commented:

;(set! tempdisplay (car (gimp-display-new tempImage)))
...
;(begin
    ;(gimp-display-delete tempdisplay)
;)

[pschild]

CLI params:

name	type	default
inSourceDir	string	""
inLoadType	enum 0=JPG,1=JPEG,2=BMP,3=PNG,4=TIF,5=TIFF	0
inSquareCrop	boolean	FALSE
inPadding	number	0
inLimit	number	10
inDeskew	boolean	TRUE
inAutoClose	boolean	TRUE
inThreshold	number	25
inSize	number	100
inDefBg	boolean	TRUE
inBgCol	string	"#FFFFFF"
inCorner	enum 0=Top Left,1=Top Right,2=Bottom Left,3=Bottom Right	0
inX	number	25
inY	number	25
inSaveInSourceDir	boolean	TRUE
inDestDir	string	""
inSaveType	enum 0=.jpg,1=.png	0
inJpgQual	number	0.8
inFileName	string	"Crop"
inFileNumber	number	1

[pschild]

added in f67f1bc

[pschild]

$image = new Imagick($_FILES['image_data']['tmp_name']);

[pschild]

May be use a JS lib? http://camanjs.com/