diff options
Diffstat (limited to 'source/blender/freestyle/intern/image/GaussianFilter.h')
| -rw-r--r-- | source/blender/freestyle/intern/image/GaussianFilter.h | 189 |
1 files changed, 93 insertions, 96 deletions
diff --git a/source/blender/freestyle/intern/image/GaussianFilter.h b/source/blender/freestyle/intern/image/GaussianFilter.h index 527444eb484..5b74e622c33 100644 --- a/source/blender/freestyle/intern/image/GaussianFilter.h +++ b/source/blender/freestyle/intern/image/GaussianFilter.h @@ -22,8 +22,8 @@ * \brief Class to perform gaussian filtering operations on an image */ -#include <cstdlib> // for abs -#include <string.h> // for memcpy +#include <cstdlib> // for abs +#include <string.h> // for memcpy #include "../system/FreestyleConfig.h" @@ -32,84 +32,82 @@ extern "C" { } #ifdef WITH_CXX_GUARDEDALLOC -#include "MEM_guardedalloc.h" +# include "MEM_guardedalloc.h" #endif namespace Freestyle { -class GaussianFilter -{ -protected: - /* The mask is a symetrical 2d array (with respect to the middle point). - * Thus, M(i,j) = M(-i,j) = M(i,-j) = M(-i,-j). - * For this reason, to represent a NxN array (N odd), we only store a ((N+1)/2)x((N+1)/2) array. - */ - float _sigma; - float *_mask; - int _bound; - // the real mask size (must be odd)(the size of the mask we store is ((_maskSize+1)/2)*((_maskSize+1)/2)) - int _maskSize; - int _storedMaskSize; // (_maskSize+1)/2) - -public: - GaussianFilter(float iSigma = 1.0f); - GaussianFilter(const GaussianFilter&); - GaussianFilter& operator=(const GaussianFilter&); - virtual ~GaussianFilter(); - - /*! Returns the value for pixel x,y of image "map" after a gaussian blur, made using the sigma value. - * The sigma value determines the mask size (~ 2 x sigma). - * \param map: - * The image we wish to work on. The Map template must implement the following methods: - * - float pixel(unsigned int x,unsigned int y) const; - * - unsigned width() const; - * - unsigned height() const; - * \param x: - * The abscissa of the pixel where we want to evaluate the gaussian blur. - * \param y: - * The ordinate of the pixel where we want to evaluate the gaussian blur. - * \param sigma: - * The sigma value of the gaussian function. - */ - template<class Map> - float getSmoothedPixel(Map *map, int x, int y); - - /*! Compute the mask size and returns the REAL mask size ((2*_maskSize)-1) - * This method is provided for convenience. - */ - static int computeMaskSize(float sigma); - - /*! accessors */ - inline float sigma() const - { - return _sigma; - } - - inline int maskSize() const - { - return _maskSize; - } - - inline int getBound() - { - return _bound; - } - - /*! modifiers */ - void setSigma(float sigma); +class GaussianFilter { + protected: + /* The mask is a symetrical 2d array (with respect to the middle point). + * Thus, M(i,j) = M(-i,j) = M(i,-j) = M(-i,-j). + * For this reason, to represent a NxN array (N odd), we only store a ((N+1)/2)x((N+1)/2) array. + */ + float _sigma; + float *_mask; + int _bound; + // the real mask size (must be odd)(the size of the mask we store is ((_maskSize+1)/2)*((_maskSize+1)/2)) + int _maskSize; + int _storedMaskSize; // (_maskSize+1)/2) + + public: + GaussianFilter(float iSigma = 1.0f); + GaussianFilter(const GaussianFilter &); + GaussianFilter &operator=(const GaussianFilter &); + virtual ~GaussianFilter(); + + /*! Returns the value for pixel x,y of image "map" after a gaussian blur, made using the sigma value. + * The sigma value determines the mask size (~ 2 x sigma). + * \param map: + * The image we wish to work on. The Map template must implement the following methods: + * - float pixel(unsigned int x,unsigned int y) const; + * - unsigned width() const; + * - unsigned height() const; + * \param x: + * The abscissa of the pixel where we want to evaluate the gaussian blur. + * \param y: + * The ordinate of the pixel where we want to evaluate the gaussian blur. + * \param sigma: + * The sigma value of the gaussian function. + */ + template<class Map> float getSmoothedPixel(Map *map, int x, int y); + + /*! Compute the mask size and returns the REAL mask size ((2*_maskSize)-1) + * This method is provided for convenience. + */ + static int computeMaskSize(float sigma); + + /*! accessors */ + inline float sigma() const + { + return _sigma; + } + + inline int maskSize() const + { + return _maskSize; + } + + inline int getBound() + { + return _bound; + } + + /*! modifiers */ + void setSigma(float sigma); #if 0 - void SetMaskSize(int size) - { - _maskSize = size; - _storedMaskSize = (_maskSize + 1) >> 1; - } + void SetMaskSize(int size) + { + _maskSize = size; + _storedMaskSize = (_maskSize + 1) >> 1; + } #endif -protected: - void computeMask(); + protected: + void computeMask(); #ifdef WITH_CXX_GUARDEDALLOC - MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:GaussianFilter") + MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:GaussianFilter") #endif }; @@ -125,33 +123,32 @@ protected: * ############################################# */ -template<class Map> -float GaussianFilter::getSmoothedPixel(Map *map, int x, int y) +template<class Map> float GaussianFilter::getSmoothedPixel(Map *map, int x, int y) { - float sum = 0.0f; - float L = 0.0f; - int w = (int)map->width(); //soc - int h = (int)map->height(); //soc - - // Current pixel is x,y - // Sum surrounding pixels L value: - for (int i = -_bound; i <= _bound; ++i) { - if ((y + i < 0) || (y + i >= h)) - continue; - for (int j = -_bound; j <= _bound; ++j) { - if ((x + j < 0) || (x + j >= w)) - continue; - - float tmpL = map->pixel(x + j, y + i); - float m = _mask[abs(i) * _storedMaskSize + abs(j)]; - L += m * tmpL; - sum += m; - } - } - //L /= sum; - return L; + float sum = 0.0f; + float L = 0.0f; + int w = (int)map->width(); //soc + int h = (int)map->height(); //soc + + // Current pixel is x,y + // Sum surrounding pixels L value: + for (int i = -_bound; i <= _bound; ++i) { + if ((y + i < 0) || (y + i >= h)) + continue; + for (int j = -_bound; j <= _bound; ++j) { + if ((x + j < 0) || (x + j >= w)) + continue; + + float tmpL = map->pixel(x + j, y + i); + float m = _mask[abs(i) * _storedMaskSize + abs(j)]; + L += m * tmpL; + sum += m; + } + } + //L /= sum; + return L; } } /* namespace Freestyle */ -#endif // __GAUSSIANFILTER_H__ +#endif // __GAUSSIANFILTER_H__ |