kernels.c File Reference

Convolution kernels. More...

#include <stdio.h>
#include <string.h>
#include <math.h>
#include "kernels.h"

Go to the source code of this file.

Macros
#define	M_SQRT1_2   0.70710678118654752440084436210484904
	The constant sqrt(1/2)

Functions
static int	KernelRescale (image *Kernel)
static int	GaussianKernel (image *Kernel, num Sigma)
static int	DiskKernel (image *Kernel, num Radius)
static int	MakeNamedKernel (image *Kernel, const char *String)
int	ReadKernel (image *Kernel, const char *String)
	Read a kernel from the command line option stirng. More...

Detailed Description

Convolution kernels.

Author

Pascal Getreuer getre.nosp@m.uer@.nosp@m.gmail.nosp@m..com

Copyright (c) 2011, Pascal Getreuer All rights reserved.

This program is free software: you can use, modify and/or redistribute it under the terms of the simplified BSD License. You should have received a copy of this license along with this program. If not, see http://www.opensource.org/licenses/bsd-license.html.

Definition in file kernels.c.

Function Documentation

int ReadKernel	(	image *	Kernel,
		const char *	String
	)

Read a kernel from the command line option stirng.

Parameters

Kernel	pointer to kernel image
String	command line optionstring

Returns

1 on success, 0 on failure

The syntax of string can be "disk:<radius>" or "gaussian:<sigma>". Otherwise, the string is assumed to be a file name.

Definition at line 175 of file kernels.c.