env_channel.c File Reference

#include "Envision/env_channel.h"
#include "Envision/env_c_math_ops.h"
#include "Envision/env_image_ops.h"
#include "Envision/env_log.h"
#include "Envision/env_params.h"

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Functions
static int	is_dyadic (const struct env_pyr *pyr, const env_size_t first, const env_size_t last)
	Check whether the pyramid is dyadic.
void	env_chan_process_pyr (const char *tagName, const struct env_dims inputDims, const struct env_pyr *pyr, const struct env_params *envp, const struct env_math *imath, const int takeAbs, const int normalizeOutput, struct env_image *result)
void	env_chan_intensity (const char *tagName, const struct env_params *envp, const struct env_math *imath, const struct env_dims inputdims, const struct env_pyr *lowpass5, const int normalizeOutput, env_chan_status_func *status_func, void *status_userdata, struct env_image *result)
	An intensity channel.
void	env_chan_color (const char *tagName, const struct env_params *envp, const struct env_math *imath, const struct env_rgb_pixel *const colimg, const struct env_rgb_pixel *const prev_colimg, const struct env_dims dims, env_chan_status_func *status_func, void *status_userdata, struct env_image *result)
	A double opponent color channel that combines r/g, b/y subchannels.
void	env_chan_steerable (const char *tagName, const struct env_params *envp, const struct env_math *imath, const struct env_dims inputdims, const struct env_pyr *hipass9, const env_size_t thetaidx, env_chan_status_func *status_func, void *status_userdata, struct env_image *result)
	An orientation filtering channel.
void	env_chan_orientation (const char *tagName, const struct env_params *envp, const struct env_math *imath, const struct env_image *img, env_chan_status_func *status_func, void *status_userdata, struct env_image *result)
	A composite channel with a set of steerable-filter subchannels.

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Detailed Description

Base class for channels that will use integer math

Definition in file env_channel.c.

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Function Documentation

void env_chan_color	(	const char *	tagName,
		const struct env_params *	envp,
		const struct env_math *	imath,
		const struct env_rgb_pixel *const	colimg,
		const struct env_rgb_pixel *const	prev_colimg,
		const struct env_dims	dims,
		env_chan_status_func *	status_func,
		void *	status_userdata,
		struct env_image *	result
	)

A double opponent color channel that combines r/g, b/y subchannels.

Definition at line 278 of file env_channel.c.

References env_chan_intensity(), env_get_rgby(), env_img_size(), env_pyr_build_lowpass_5(), env_pyr_init(), env_dims::h, and env_dims::w.

void env_chan_intensity	(	const char *	tagName,
		const struct env_params *	envp,
		const struct env_math *	imath,
		const struct env_dims	inputdims,
		const struct env_pyr *	lowpass5,
		const int	normalizeOutput,
		env_chan_status_func *	status_func,
		void *	status_userdata,
		struct env_image *	result
	)

An intensity channel.

Definition at line 256 of file env_channel.c.

Referenced by env_chan_color().

void env_chan_orientation	(	const char *	tagName,
		const struct env_params *	envp,
		const struct env_math *	imath,
		const struct env_image *	img,
		env_chan_status_func *	status_func,
		void *	status_userdata,
		struct env_image *	result
	)

A composite channel with a set of steerable-filter subchannels.

Definition at line 384 of file env_channel.c.

References env_c_image_div_scalar(), env_c_image_div_scalar_accum(), env_chan_steerable(), env_img_initialized(), env_img_size(), env_pyr_init(), and env_params::num_orientations.

void env_chan_steerable	(	const char *	tagName,
		const struct env_params *	envp,
		const struct env_math *	imath,
		const struct env_dims	inputdims,
		const struct env_pyr *	hipass9,
		const env_size_t	thetaidx,
		env_chan_status_func *	status_func,
		void *	status_userdata,
		struct env_image *	result
	)

An orientation filtering channel.

Definition at line 343 of file env_channel.c.

Referenced by env_chan_orientation().

static int is_dyadic	(	const struct env_pyr *	pyr,
		const env_size_t	first,
		const env_size_t	last
	)			[static]

Check whether the pyramid is dyadic.

A dyadic pyramid is one in which each level is one half the width and one half the height of the preceding level.

Definition at line 53 of file env_channel.c.

References env_pyr_img(), env_dims::h, and env_dims::w.