Colorspace

Functions to change an image from one color space to another. More...

Collaboration diagram for Colorspace:

Files
file	colorspace.h

Macros
#define	icv_rgb2gray_ntsc(_a)   icv_rgb2gray(_a, ICV_COLOR_RGB, 0.30, 0.59, 0.11)
#define	icv_rgb2gray_crt(_a)   icv_rgb2gray(_a, ICV_COLOR_RGB, 0.26, 0.66, 0.08)

Enumerations
enum	ICV_COLOR {   ICV_COLOR_RGB , ICV_COLOR_R , ICV_COLOR_G , ICV_COLOR_B ,   ICV_COLOR_RG , ICV_COLOR_RB , ICV_COLOR_BG }

Functions
int	icv_gray2rgb (icv_image_t *img)
int	icv_rgb2gray (icv_image_t *img, ICV_COLOR color, double rweight, double gweight, double bweight)

Detailed Description

Functions to change an image from one color space to another.

Macro Definition Documentation

icv_rgb2gray_ntsc

#define icv_rgb2gray_ntsc

(

_a

)

icv_rgb2gray(_a, ICV_COLOR_RGB, 0.30, 0.59, 0.11)

converts image to single channel image by combining three weights based on NTSC primaries and 6500 white.

Definition at line 62 of file colorspace.h.

icv_rgb2gray_crt

#define icv_rgb2gray_crt

(

_a

)

icv_rgb2gray(_a, ICV_COLOR_RGB, 0.26, 0.66, 0.08)

converts image to single channel image by combining three weights based on CRT phosphor and D6500 white.

Definition at line 68 of file colorspace.h.

Enumeration Type Documentation

ICV_COLOR

enum ICV_COLOR

Enumerator
ICV_COLOR_RGB
ICV_COLOR_R
ICV_COLOR_G
ICV_COLOR_B
ICV_COLOR_RG
ICV_COLOR_RB
ICV_COLOR_BG

Definition at line 39 of file colorspace.h.

Function Documentation

icv_gray2rgb()

int icv_gray2rgb

(

icv_image_t *

img

)

Converts a single channel image to three channel image. Replicates the pixel as done by bw-pix utility returns a three channel image. If a three channel image is passed, this function returns the same image.

icv_rgb2gray()

int icv_rgb2gray	(	icv_image_t *	img,
		ICV_COLOR	color,
		double	rweight,
		double	gweight,
		double	bweight
	)

converts a three channel rgb image to single channel gray-image. This function will combine or select planes of the image based on the input arguments.

A normal calling of this functions is as follows: icv_image_rgb2gray(bif, 0, 0, 0, 0); where bif is the rgb image to be converted.

Parameters

[in,out]	img	- image
[in]	color	Chooses color planes to be selected for combination. This function will need color to be specified from ICV_COLOR_R ICV_COLOR_G ICV_COLOR_B ICV_COLOR_RG ICV_COLOR_RB ICV_COLOR_BG ICV_COLOR_RGB
[in]	rweight	Weight for r-plane
[in]	gweight	Weight for g-plane
[in]	bweight	Weight for b-plane

Returns

0 on success; on failure return 1

User can specify weights in the arguments, for the selected color planes. If 0 weight is chosen this utility assigns equal weights.