Fixed Filters

Fixed filters perform linear filtering operations (such as convolutions) with predefined kernels of fixed sizes. More...

Modules
	FilterPrewitt
	Filters the image using a Prewitt filter kernel.
	FilterPrewittBorder
	Filters the image using a Prewitt filter kernel with border control.
	FilterScharr
	Filters the image using a Scharr filter kernel.
	FilterScharrBorder
	Filters the image using a Scharr filter kernel with border control.
	FilterSobel
	Filters the image using a Sobel filter kernel.
	FilterSobelBorder
	Filters the image using a Sobel filter kernel with border control.
	FilterRoberts
	Filters the image using a Roberts filter kernel.
	FilterRobertsBorder
	Filters the image using a Roberts filter kernel with border control.
	FilterLaplace
	Filters the image using a Laplacian filter kernel.
	FilterLaplaceBorder
	Filters the image using a Laplacian filter kernel with border control.
	FilterGauss
	Filters the image using a Gaussian filter kernel.
	FilterGaussAdvanced
	Filters the image using a separable Gaussian filter kernel with user supplied floating point coefficients:
	FilterGaussBorder
	Filters the image using a Gaussian filter kernel with border control.
	FilterGaussAdvancedBorder
	Filters the image using a separable Gaussian filter kernel with user supplied floating point coefficients with border control.
	FilterGaussPyramidLayerDownBorder
	Filters the image using a separable Gaussian filter kernel with user supplied floating point coefficients with downsampling and border control.
	FilterGaussPyramidLayerUpBorder
	Filters the image using a separable Gaussian filter kernel with user supplied floating point coefficients with upsampling and border control.
	FilterBilateralGaussBorder
	Filters the image using a bilateral Gaussian filter kernel with border control.
	FilterHighPass
	Filters the image using a high-pass filter kernel.
	FilterHighPassBorder
	Filters the image using a high-pass filter kernel with border control.
	FilterLowPass
	Filters the image using a low-pass filter kernel.
	FilterLowPassBorder
	Filters the image using a low-pass filter kernel with border control.
	FilterSharpen
	Filters the image using a sharpening filter kernel:
	FilterSharpenBorder
	Filters the image using a sharpening filter kernel with border control.
	FilterUnsharpBorder
	Filters the image using a unsharp-mask sharpening filter kernel with border control.
	FilterWienerBorder
	Noise removal filtering of an image using an adaptive Wiener filter with border control.
	GradientVectorPrewittBorder
	RGB Color to Prewitt Gradient Vector conversion using user selected fixed mask size and gradient distance method.
	GradientVectorScharrBorder
	RGB Color to Scharr Gradient Vector conversion using user selected fixed mask size and gradient distance method.
	GradientVectorSobelBorder
	RGB Color to Sobel Gradient Vector conversion using user selected fixed mask size and gradient distance method.

Detailed Description

Fixed filters perform linear filtering operations (such as convolutions) with predefined kernels of fixed sizes.

Note that this section also contains a few dynamic kernel filters, namely GaussAdvanced and Bilateral.

Some of the fixed filters have versions with border control. For these functions, if any portion of the mask overlaps the source image boundary the requested border type operation is applied to all mask pixels which fall outside of the source image.

Currently only the NPP_BORDER_REPLICATE border type operation is supported for these functions.