Performs downsampling step of Gaussian pyramid decomposition. First it convolves source image with the specified filter and then downsamples the image by rejecting even rows and columns.

Namespace:  Emgu.CV
Assembly:  Emgu.CV (in Emgu.CV.dll) Version: 2.0.1.0 (2.0.1.0)

Syntax

C#
public static void cvPyrDown(
	IntPtr src,
	IntPtr dst,
	FILTER_TYPE filter
)
Visual Basic (Declaration)
Public Shared Sub cvPyrDown ( _
	src As IntPtr, _
	dst As IntPtr, _
	filter As FILTER_TYPE _
)
Visual C++
public:
static void cvPyrDown(
	IntPtr src, 
	IntPtr dst, 
	FILTER_TYPE filter
)

Parameters

src
Type: System..::.IntPtr
The source image.
dst
Type: System..::.IntPtr
The destination image, should have 2x smaller width and height than the source.
filter
Type: Emgu.CV.CvEnum..::.FILTER_TYPE
Type of the filter used for convolution; only CV_GAUSSIAN_5x5 is currently supported.

See Also