python images

pythoncollegelevel

Pixel

A tiny dot that makes up an image; each pixel encodes a color

RGB

Each pixel has 3 bytes (24 bits): one for red, one for green, one for blue

PIL

Python Imaging Library — provides tools for image processing in Python

PIL Functions

width
height
getpixel
pxred
pxgreen

pxblue
putpixel

width

Property Number of pixels wide

height

Property Number of pixels tall

getpixel

Function Returns RGB tuple at position (x, y)

pxred

Attribute Gets red value from a pixel

pxgreen

Attribute Gets green value from a pixel

pxblue

Attribute Gets blue value from a pixel

putpixel

Function Sets color of pixel at (x, y)

PIL Drawing Functions

line()
rectangle()
ellipse()
point()
text()

line()

start point, end point, color, width Draws a line between two points

rectangle()

top-left, bottom-right, fill, outline, width Draws a rectangle (filled or outline)

ellipse()

bounding box, fill, outline, width Draws circle/oval inside bounding box

point()

coordinates, color Draws dots at specified coordinates

text()

position, text string, color Adds text to image (top-left corner)