rgb2hsv

This program takes in three input images, representing Red, Green, and Blue, then outputs Hue, Saturation, and Value files respectively. It works by creating an RGB pixel from pixels in the Red, Green, and Blue files, converting it to HSV format, then writing the data to the Hue, Saturation, and Value files.

NOTE: The original input file dn range is compressed down to a value between 0.0 and 1.0 When it comes back out through hsv2rgb, it remains in the range of 0.0 to 1.0 We currently do not have the capability to return the dn values to their original value.

HSV Stores colors in terms of hue, saturation, and value. The hue determines the color, which is an angle around the color wheel. The basic colors are: 0 degrees = RED, 60 degrees = YELLOW, 120 degrees = GREEN, 180 degrees = CYAN, 240 degrees = BLUE and 300 degrees = PURPLE.
The saturation is how much grey is in the color (intensity of the color). A saturation value of zero means it's a perfect color, while a saturation value of 1 would cause any color to become pure grey. As an example, the color RGB(255,0,0) is pure so the saturation would be zero. The value is how bright the color is. A value of 0 is always black, and 100 is the color (if not saturated).

In brief,
HUE = COLOR (degrees around the color wheel)
SATURATION = INTENSITY (0-1, 0 being no color/grey)
VALUE = BRIGHTNESS (0 being black)

For more information, see
http://en.wikipedia.org/wiki/Color_spaces

Description

This file will be converted from Red to Hue

Type	cube
File Mode	input
Filter	*.cub

Description

This file will be converted from Green to Saturation

Type	cube
File Mode	input
Filter	*.cub

Description

This file will be converted from Blue to Value

Type	cube
File Mode	input
Filter	*.cub

Description

The resultant Hue cube

Type	cube
File Mode	output
Pixel Type	real
Filter	*.cub

Description

The resultant Saturation cube

Type	cube
File Mode	output
Pixel Type	real
Filter	*.cub

Description

The resultant Value cube

Type	cube
File Mode	output
Pixel Type	real
Filter	*.cub

Description

This determines which values will be used for minimum and maximum cut-off limits

Type	string
Default	Automatic
Option List:	Option Brief Description Automatic Use default percentages Use minimum and maximum percentages of 0.5 and 99.5 for each input files' histogram cut-off values. Exclusions RMIN RMAX GMIN GMAX BMIN BMAX Manual Use manually defined percentages The user defines minimum and maximum pixel values Exclusions RMINPER RMAXPER GMINPER GMAXPER BMINPER BMAXPER

Description

Minimum cut-off value for the histogram

Type	double
Default	0.5
Minimum	0.0 (inclusive)
Less Than	RMAXPER

Description

Maximum cut-off value for the histogram

Type	double
Default	99.5
Maximum	100.0 (inclusive)

Description

Minimum cut-off value for the histogram

Type	double
Default	0.5
Minimum	0.0 (inclusive)
Less Than	GMAXPER

Description

Maximum cut-off value for the histogram

Type	double
Default	99.5
Maximum	100.0 (inclusive)

Description

Minimum cut-off value for the histogram

Type	double
Default	0.5
Minimum	0.0 (inclusive)
Less Than	BMAXPER

Description

Maximum cut-off value for the histogram

Type	double
Default	99.5
Maximum	100.0 (inclusive)

Description

Minimum cut-off pixel value

Type	double
Minimum	0.0 (inclusive)
Less Than	RMAX

Description

Maximum cut-off pixel value

Type	double
Maximum	255.0 (inclusive)

Description

Minimum cut-off pixel value

Type	double
Minimum	0.0 (inclusive)
Less Than	GMAX

Description

Maximum cut-off pixel value

Type	double
Maximum	255.0 (inclusive)

Description

Minimum cut-off pixel value

Type	double
Minimum	0.0 (inclusive)
Less Than	RMAX

Description

Maximum cut-off pixel value

Type	double
Maximum	255.0 (inclusive)

This example shows the results of converting RGB images to HSV format.

rgb2hsv red=../peaks.cub+5 green=../peaks.cub+4 blue=../peaks.cub+3 hue=../hue.cub saturation=../sat.cub value=../val.cub mode=automatic

RGB2HSV Gui

Example Gui Screenshot of GUI with parameters filled in to perform a conversion from RGB to HSV using the different bands of peaks.cub.

Input Peaks (Bands 3, 4, and 5) image

Input image for rgb2hsv This is the color input image for the rgb2hsv example.

Output image showing results of rgb2hsv.	Output image Parameter Name: HUE This is the output image that results from converting Red to Hue.
Output image showing results of rgb2hsv.	Output image Parameter Name: SATURATION This is the output image that results from converting Green to Saturation.
Output image showing results of rgb2hsv.	Output image Parameter Name: VALUE This is the output image that results from converting Blue to Value.