Batch Background Removal - Printable Version

Code:
#!/usr/bin/env python

# -*- coding: utf-8 -*-



#     Erase a complex and non even background



#

#   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

#   MERCHANDABILITY 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.



import os,sys,math,time

from gimpfu import *





def eraseBackground2(image,layer):

    image.undo_group_start()

    gimp.context_push()

    try:

        # 1. Duplicate the layer

        DuplicateLayer = pdb.gimp_layer_copy(layer, add_alpha)

                

        # 1.1 increase contrast and tweak the brightness so that everything you want to remove is white.

        pdb.gimp_brightness_contrast(drawable, 10, 110)

        

        # 2. apply color-to-alpha and remove the white

        pdb.plug_in_colortoalpha(image, drawable, 255)

    

        # 3. alpha-select the result 

        

        gimp_select_item()



        # 4. add a layer mask to the initial image, using the selection to initialize the mask

        pdb.gimp_image_add_layer_mask(image, layer-1, mask)

    

        # 5. delete the copy

        pdb.gimp_layer_delete(DuplicateLayer)

        

        # 6. save in png  

               

 ???



    gimp.context_pop()

    image.undo_group_end()





### Registration

whoiam='\n'+os.path.abspath(sys.argv[0])

author='Chris'

copyrightYear='2019'

desc='Erase a complex and non even background'

moredesc='\nWand-select (roughly) the background before use'

register(

    'ofn-erase-background',

    desc+moredesc+whoiam,desc,

    author,author,copyrightYear,

    'Erase uneven background',

    'RGB*',

    [

        (PF_IMAGE, 'image', 'Input image', None),

        (PF_DRAWABLE, 'drawable', 'Input drawable', None),

    ],

    [],

    eraseUnevenBackground2,

    menu='<Image>/Layer'

)



main()