Corelation

Last modified: July 05, 2012

Contents

corelation_sum
corelation_sum_squares
corelation_weighted

`corelation_sum`

float corelation_sum (Image [OneBit] template, Point offset)

Operates on:	`Image` [OneBit\|GreyScale]
Returns:	float
Category:	Corelation
Defined in:	corelation.py
Author:	Michael Droettboom

Returns a floating-point value for how well an image is corelated to another image placed at a given origin (x, y). Uses the sum of absolute distance method. A higher value indicates more corelation.

template: The template image.
offset: The displacement of the template on the image.

`corelation_sum_squares`

float corelation_sum_squares (Image [OneBit] template, Point offset)

Operates on:	`Image` [OneBit\|GreyScale]
Returns:	float
Category:	Corelation
Defined in:	corelation.py
Author:	Michael Droettboom

Returns a floating-point value for how well an image is corelated to another image placed at a given origin (x, y). Uses the sum of squares method. A higher value indicates more corelation.

template: The template image.
offset: The displacement of the template on the image.

`corelation_weighted`

float corelation_weighted (Image [OneBit] template, Point offset, float bb, float bw, float wb, float ww)

Operates on:	`Image` [OneBit\|GreyScale]
Returns:	float
Category:	Corelation
Defined in:	corelation.py
Author:	Michael Droettboom

Returns a floating-point value for how well an image is corelated to another image placed at a given origin (x, y). Uses the weighted reward/penalty method.

template: The template image.
offset: The displacement of the template on the image.
bb, bw, wb, ww: The rewards and penalties for different combinations of pixels. The first letter in the arugment name indicates the color of the template; the second letter indicates the color of the source image. For instance, the value of bw will be applied to the result when the template pixel is black and the source image pixel is white.

Image		Template
		black	white
	black	bb	wb
	white	bw	ww