libastrometry-dev 0.70+dfsg-1 / usr / include / astrometry / convolve-image.h

/*
# This file is part of the Astrometry.net suite.
# Licensed under a 3-clause BSD style license - see LICENSE
*/

#ifndef CONVOLVE_IMAGE_H
#define CONVOLVE_IMAGE_H


float* convolve_get_gaussian_kernel_f(double sigma, double nsigma, int* k0, int* NK);

// Does 2-D convolution by applying the same kernel in x and y directions.
// Output image can be the same as input image.
float* convolve_separable_f(const float* img, int W, int H,
							const float* kernel, int k0, int NK,
							float* outimg, float* tempimg);

/** Hacky -- "weight" must be the same size as "img".  Weights pixels
 by the kernel and the weight image.  Probably only useful/correct if the
 weight matrix contains a constant and zeros for masked pixels.
 */
float* convolve_separable_weighted_f(const float* img, int W, int H,
									 const float* weight,
									 const float* kernel, int k0, int NK,
									 float* outimg, float* tempimg);

#endif