colorspace

Colorspace conversion function. More...

Functions
AFAPI array	colorspace (const array &image, const CSpace to, const CSpace from)
	C++ Interface wrapper for colorspace conversion. More...
AFAPI array	colorSpace (const array &image, const CSpace to, const CSpace from)
	C++ Interface wrapper for colorspace conversion. More...
AFAPI af_err	af_color_space (af_array *out, const af_array image, const af_cspace_t to, const af_cspace_t from)
	C Interface wrapper for color space conversion. More...

Detailed Description

Colorspace conversion function.

RGB (Red, Green, Blue) is the most common format used in computer imaging. RGB stores individual values for red, green and blue, and hence the 3 values per pixel. A combination of these three values produces the gamut of unique colors.

HSV (Hue, Saturation, Value), also known as HSB (hue, saturation, brightness), is often used by artists because it is more natural to think about a color in terms of hue and saturation than in terms of additive or subtractive color components (as in RGB). HSV is a transformation of RGB colorspace; its components and colorimetry are relative to the RGB colorspace from which it was derived. Like RGB, HSV also uses 3 values per pixel.

Grayscale is a single channel color space where pixel value ranges from 0 to 1. Zero represents black, one represent white and any value between zero & one is a gray value

Supported conversions

From	To
AF_RGB	AF_GRAY
AF_GRAY	AF_RGB
AF_RGB	AF_HSV
AF_HSV	AF_RGB

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Function Documentation

AFAPI af_err af_color_space	(	af_array *	out,
		const af_array	image,
		const af_cspace_t	to,
		const af_cspace_t	from
	)

C Interface wrapper for color space conversion.

Parameters

[out]	out	is an array in target color space
[in]	image	is the input array
[in]	to	is the target array color space
[in]	from	is the input array color space

Returns

AF_SUCCESS if the color transformation is successful, otherwise an appropriate error code is returned.

Note

image must be 3 dimensional for AF_HSV to AF_RGB, AF_RGB to AF_HSV, & AF_RGB to AF_GRAY transformations. For AF_GRAY to AF_RGB transformation, 2D array is expected.

AFAPI array af::colorspace	(	const array &	image,
		const CSpace	to,
		const CSpace	from
	)

C++ Interface wrapper for colorspace conversion.

Parameters

[in]	image	is the input array
[in]	to	is the target array colorspace
[in]	from	is the input array colorspace

Returns

array in target colorspace

Note

image must be 3 dimensional for AF_HSV to AF_RGB, AF_RGB to AF_HSV, & AF_RGB to AF_GRAY transformations. For AF_GRAY to AF_RGB transformation, 2D array is expected.

Deprecated:

Use colorSpace instead

AFAPI array af::colorSpace	(	const array &	image,
		const CSpace	to,
		const CSpace	from
	)

C++ Interface wrapper for colorspace conversion.

Parameters

[in]	image	is the input array
[in]	to	is the target array colorspace
[in]	from	is the input array colorspace

Returns

array in target colorspace

Note

image must be 3 dimensional for AF_HSV to AF_RGB, AF_RGB to AF_HSV, & AF_RGB to AF_GRAY transformations. For AF_GRAY to AF_RGB transformation, 2D array is expected.

Examples:

computer_vision/fast.cpp, computer_vision/harris.cpp, computer_vision/matching.cpp, computer_vision/susan.cpp, image_processing/adaptive_thresholding.cpp, image_processing/binary_thresholding.cpp, image_processing/filters.cpp, image_processing/image_demo.cpp, image_processing/image_editing.cpp, and image_processing/pyramids.cpp.