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some mainstream image filter: boxfilter, fast guided filter, fast bilateral filter, permutohedral bilateral filter and propagated filter

  • boxfilter
  • fast guided filter
  • fast bilateral filter
  • permutohedral bilateral filter
  • propagated filter

All original dependencies have been removed. Code could be run independently.

BOXFILTER

@param src         				image,single channel.

@param dst      				output image,single channel.

@param w           				width of image.

@param h           				height of image.

@param c      					channel of image, only c = 1.

@param r      					local window radius.

@return            				0:ok; 1:error
int BoxfilterFilter(unsigned char *src, unsigned char *dst, int w, int h, int c, int r);

Fast Guided Filter

@param src         				image,single channel.

@param guidance           		guided image,single channel.

@param dst      				output image,single channel.

@param w           				width of image.

@param h           				height of image.

@param c      					channel of image, only c = 1.

@param r      					local window radius.

@param rp      					regularization parameter:eps.

@param sr      					subsampling ratio, sr>1:downscale; 0<sr<1:upscale.

@return            				0:ok; 1:error
int FastGuidedFilter(unsigned char *src, unsigned char *guidance, unsigned char *dst, int w, int h, int c, int r, float rp, float sr);

FastBilateralFilter

@param src         				input image.

@param guidance           		guided image,single channel, only single channel is valid; invalid parameter in three channels.

@param dst      				output image.

@param w           				width of image.

@param h           				height of image.

@param c      					channel of image, only c = 1 or c = 3.

@param sigma_s      			filter sigma in the coordinate space. A larger value of the parameter means that farther pixels will influence each other as long as their colors are close enough (see sigmaColor ). When d>0, it specifies the neighborhood size regardless of sigmaSpace. Otherwise, d is proportional to sigmaSpace.

@param sigma_r      			filter sigma in the color space. A larger value of the parameter means that farther colors within the pixel neighborhood (see sigmaSpace) will be mixed together, resulting in larger areas of semi-equal color.

@return            				0:ok; 1:error
int FastBilateralFilter(unsigned char *src, unsigned char *guidance, unsigned char *dst, int w, int h, int c, float sigma_s, float sigma_r);

PermutohedralBilateralFilter

@param src         				input image.

@param guidance           		guided image. 

@param dst      				output image.

@param w           				width of image.

@param h           				height of image.

@param c      					channel of image, only c = 1 or c = 3.

@param sigma_s      			filter sigma in the coordinate space. A larger value of the parameter means that farther pixels will influence each other as long as their colors are close enough (see sigmaColor ). When d>0, it specifies the neighborhood size regardless of sigmaSpace. Otherwise, d is proportional to sigmaSpace.

@param sigma_r      			filter sigma in the color space. A larger value of the parameter means that farther colors within the pixel neighborhood (see sigmaSpace) will be mixed together, resulting in larger areas of semi-equal color.

@return            				0:ok; 1:error
int PermutohedralBilateralFilter(unsigned char *src, unsigned char *guidance, unsigned char *dst, int w, int h, int c, float sigma_s, float sigma_r);

PropagatedFilter

@param src         				input image.

@param guidance           		guided image. 

@param dst      				output image.

@param w           				width of image.

@param h           				height of image.

@param c      					channel of image, only c = 1 or c = 3.

@param r      					local window radius.

@param sigma_s      			filter sigma in the coordinate space. A larger value of the parameter means that farther pixels will influence each other as long as their colors are close enough (see sigmaColor ). When d>0, it specifies the neighborhood size regardless of sigmaSpace. Otherwise, d is proportional to sigmaSpace.

@param sigma_r      			filter sigma in the color space. A larger value of the parameter means that farther colors within the pixel neighborhood (see sigmaSpace) will be mixed together, resulting in larger areas of semi-equal color.

@return            				0:ok; 1:error
int PropagatedFilter(unsigned char *src, unsigned char *guidance, unsigned char *dst, int w, int h, int c, int r, float sigma_s, float sigma_r);

Reference