Bsoft function

img_colour_power_spectrum

Source:

src/img/img_complex.c

Description:

Generates a power spectrum with phases coloured according to a colour wheel.

Algorithm: 

	A polar data type image (such as a Fourier transform) is converted

	to indicate the phases as colours. The primary colours are located

	0 degrees (red), 120 degrees (green) and -120 degrees (blue). All

	three colour values are down-weighted based on the amplitude. The

	weighting is calculated as:

		weight = amplitude/(average+2*standard_deviation)

	The origin specified in the image is used to shift the phases.

	The scale is multiplied with the amplitude and cut off at one

	to give the user the ability to enhance the image.

	Default:

		scale = 1/(average_amplitude + standard_deviation_of_amplitude)

Arguments:

Bimage* pimage.
float scaleamplitude scaling.

Returns:

int 0.

Prototype:

int img_colour_power_spectrum(Bimage* p, float scale)

Functions used:

balloc
bfree

Other objects included:

struct Bimage
struct Bmarker
class Complex

Generated by bdoc.pl on Mon Jun 15 11:47:45 2009

Back to the Bsoft home