Resizes images passed as arguments to RESIZE_WIDTH x RESIZE_HEIGTH, stretching source image. Meant to be used in Automator.

gistfile1.py

#! /usr/bin/python

import sys
import CoreGraphics

RESIZE_WIDTH = 100
RESIZE_HEIGHT = 100

def resizeimage(source_image_file, target_image_file, target_width, target_height):
    source_image = CoreGraphics.CGImageImport (CoreGraphics.CGDataProviderCreateWithFilename(source_image_file))

    source_width = source_image.getWidth()
    source_height = source_image.getHeight()

    source_image_rect = CoreGraphics.CGRectMake(0, 0, source_width, source_height)
    new_image = source_image.createWithImageInRect(source_image_rect)

    colors_space = CoreGraphics.CGColorSpaceCreateDeviceRGB()
    colors = CoreGraphics.CGFloatArray(5)
    context = CoreGraphics.CGBitmapContextCreateWithColor(target_width, target_height, colors_space, colors)
    context.setInterpolationQuality(CoreGraphics.kCGInterpolationHigh)
    new_image_rect = CoreGraphics.CGRectMake(0, 0, target_width, target_height)
    context.drawImage(new_image_rect, new_image)
    context.writeToFile(target_image_file, CoreGraphics.kCGImageFormatJPEG)



def main(argv):
    for image_file_name in argv:
        resizeimage(image_file_name, image_file_name, RESIZE_WIDTH, RESIZE_HEIGHT)

if __name__ == "__main__":
    main(sys.argv[1:])