Py-ImageKit

ImageKit is a lightweight low level image manipulation library, which I use for quickly prototyping new image processing filters and computer vision algorithms. It's currently supported on Linux and OS X, for Python 2.5+ and 3.x.

Dependencies

ImageKit requires libpng and libjpeg. The implementation doesn't necessarily matter (it will work fine with both libjpeg and libjpeg-turbo). GIF support may be added in the future.

Installing

To install, simply run 'sudo python setup.py install'

TODO

On OS X, libjpeg-config is not necessarily available, if installed through MacPorts. I need to find a more permanent workaround to this problem.

Examples

Rank Filter:

from imagekit import *

def main():
    b = ImageBuffer.from_png('images/image02.png')
    b.apply_rankfilter(3, 0.5) # Neighborhood size, Rank (0.0 - 1.0)
    b.save_png('output.png')

if __name__ == '__main__':
    main()

Rotate 90 Degress:

from imagekit import *

def main():
    input = ImageBuffer.from_png('images/image01.png')
    output = ImageBuffer(   width=input.height,
                            height=input.width,
                            channels=input.channels)
    
    # Rotate image by 90 degrees
    for y in range(input.height):
        line = input.hzline_out(y)
        output.vtline_in(input.height - y - 1, line)
    
    output.save_png('example1-output.png')

if __name__ == '__main__':
    main()

Generate HSV Color Pattern:

import random
from imagekit import *

def main():
    b = ImageBuffer(640, 480, 3, 360.0, COLORSPACE_HSV, COLORSPACE_FORMAT_HSV_NATURAL)
    
    hue_scale = 360.0 / b.width
    for y in range(b.height):
        for x in range(b.width):
            b.set_pixel(x, y, (x * hue_scale, 1.0, 1.0))

    b.save_png('example5-output.png')

if __name__ == '__main__':
    main()

TODO

• Force channele ranges between 0.0 and 1.0, conversion handled by I/O modules.
• API Documentation
• Easing / Tweening Module
• Cubic Family Scaling Algorithms
• Bilateral Filter
• YCbCr Color Format
• Anti-aliased drawing methods
• Font Support