thonny-cImage 1.4.2

Image manipulation library for media computation education

cImage - A simple image processing library for Python

Installation

copy cImage.py to your site-packages directory.

Usage

This image library is not going to give you fancy high performance operations on images. It allows you to read in an image and manipulate its pixels. Then you can save the new image to a file, or you can display the image in a window. Thats really about it, but its really all you want to do if you are teaching an introductory computer science course.

Image Types Supported

If you have PIL installed on your system:

• jpeg

• gif

• tiff

• png

• etc.

If you do not have PIL installed then you are stuck with GIF images only.

If you are using Python 2.6/2.7 I recommend you install Pillow its a simple fork of PIL that you can install with easy_install or pip.

If you are using Python 3 You can get a working version of PIL Here: https://pypi.python.org/pypi/Pillow/2.0.0

Note that if you scroll down to the bottom you will find binary installations for Windows. Linux and Mac users can follow the instructions on the page.

Example

from cImage import *
myimagewindow = ImageWin("Image Processing",600,300)
oldimage = FileImage("lutherbell.jpg")
oldimage.setPosition(0,0)
oldimage.draw(myimagewindow)

width = oldimage.getWidth()
height = oldimage.getHeight()
newim = EmptyImage(width,height)

for row in range(height):
    for col in range(width):
            oldpixel = oldimage.getPixel(col,row)
            ave=(oldpixel.getRed()+oldpixel.getGreen()+oldpixel.getBlue())/3
            newim.setPixel(col,row,Pixel(ave,ave,ave))

newim.setPosition(width+1,0)
newim.draw(myimagewindow)

myimagewindow.exitOnClick()