Image Filters

Routines for image filtering. More...

Collaboration diagram for Image Filters:

Files
file	filters.h

Enumerations
enum	ICV_FILTER {   ICV_FILTER_LOW_PASS , ICV_FILTER_LAPLACIAN , ICV_FILTER_HORIZONTAL_GRAD , ICV_FILTER_VERTICAL_GRAD ,   ICV_FILTER_HIGH_PASS , ICV_FILTER_NULL , ICV_FILTER_BOXCAR_AVERAGE }
enum	ICV_FILTER3 {   ICV_FILTER3_LOW_PASS , ICV_FILTER3_HIGH_PASS , ICV_FILTER3_BOXCAR_AVERAGE , ICV_FILTER3_ANIMATION_SMEAR ,   ICV_FILTER3_NULL }

Functions
int	icv_filter (icv_image_t *img, ICV_FILTER filter_type)
icv_image_t *	icv_filter3 (icv_image_t *old_img, icv_image_t *curr_img, icv_image_t *new_img, ICV_FILTER3 filter_type)
int	icv_fade (icv_image_t *img, double fraction)
	Fades an image in place.

Detailed Description

Routines for image filtering.

This is done mainly using the convolution of images. Both Gray Scale and RGB images are taken care of.

Enumeration Type Documentation

ICV_FILTER

enum ICV_FILTER

Enumerator
ICV_FILTER_LOW_PASS
ICV_FILTER_LAPLACIAN
ICV_FILTER_HORIZONTAL_GRAD
ICV_FILTER_VERTICAL_GRAD
ICV_FILTER_HIGH_PASS
ICV_FILTER_NULL
ICV_FILTER_BOXCAR_AVERAGE

Definition at line 41 of file filters.h.

ICV_FILTER3

enum ICV_FILTER3

Enumerator
ICV_FILTER3_LOW_PASS
ICV_FILTER3_HIGH_PASS
ICV_FILTER3_BOXCAR_AVERAGE
ICV_FILTER3_ANIMATION_SMEAR
ICV_FILTER3_NULL

Definition at line 51 of file filters.h.

Function Documentation

icv_filter()

int icv_filter ( icv_image_t *  img, ICV_FILTER  filter_type  )

extern

Filters an image with the specified filter type. Basically convolves kernel with the image. Border samples are handled by clamping to the nearest valid edge pixel, which keeps normalized kernels normalized at image edges and on images smaller than the kernel. ICV_FILTER_NULL is a pass-through.

Parameters

img	Image to be filtered.
filter_type	Type of filter to be used.

icv_filter3()

icv_image_t * icv_filter3 ( icv_image_t *  old_img, icv_image_t *  curr_img, icv_image_t *  new_img, ICV_FILTER3  filter_type  )

extern

Filters a set of three images with the specified filter type. Border samples are handled by clamping to the nearest valid edge pixel in each frame. Finds the resultant pixel with the help of neighboring pixels in all three images. ICV_FILTER3_NULL returns a copy of the current frame.

Returns

Resultant image.

icv_fade()

int icv_fade ( icv_image_t *  img, double  fraction  )

extern

Fades an image in place.

icv_fade will darken a pix by a certain fraction.

Parameters

img	ICV Image to be faded.
fraction	should be between 0 to 1. Amount by which the image is needed to faded.