Trim whitespace using PIL

I don't think there is anything built in to PIL that can do this. But I've modified your code so it will do it.

• It gets the border colour from the top left pixel, using getpixel, so you don't need to pass the colour.
• Subtracts a scalar from the differenced image, this is a quick way of saturating all values under 100, 100, 100 (in my example) to zero. So is a neat way to remove any 'wobble' resulting from compression.

Code:

from PIL import Image, ImageChopsdef trim(im):    bg = Image.new(im.mode, im.size, im.getpixel((0,0)))    diff = ImageChops.difference(im, bg)    diff = ImageChops.add(diff, diff, 2.0, -100)    bbox = diff.getbbox()    if bbox:        return im.crop(bbox)im = Image.open("bord3.jpg")im = trim(im)im.show()

Heavily compressed jpeg:

Cropped:

Noisy jpeg:

Cropped:

Use wand http://docs.wand-py.org/en/0.3-maintenance/wand/image.html

trim(color=None, fuzz=0) Remove solid border from image. Uses top left pixel as a guide by default, or you can also specify the color to remove.

using trim function at ufp.image module.

import ufp.imageimport PILim = PIL.Image.open('test.jpg', 'r')trimed = ufp.image.trim(im, fuzz=13.3)trimed.save('trimed.jpg')