emgu.cv的图像金字塔操作

    emgu.cv里有三个常用的影像金字塔（重采样，每一级倍数2）函数：

1) BuildPyramid(int maxLevel) 建立多级影像金字塔

C#例子：Int maxLevel;

Image<Gray,byte> []imgs = img.BuildPyramid(maxLevel);

2) PyrDown() 向下（粗）重采样

C#例子：Image<Gray,byte>imgd = img.PyrDown();

3) PyrUp() 向上（细）重采样

C#例子：Image<Gray,byte>imgu = img.PyrUp();

 

详情如下：

1) Image(TColor, TDepth).BuildPyramidMethod

Compute the image pyramid

Namespace: Emgu.CV

Assembly: Emgu.CV (in Emgu.CV.dll) Version: 2.4.2.1777 (2.4.2.1777)

Collapse imageSyntax

Syntax(C#)

public Image<TColor, TDepth>[]BuildPyramid(int maxLevel)

Parameters

maxLevel

Type: System.Int32

The number of level's for the pyramid;Level 0 referes to the current image, level n is computed by calling thePyrDown() function on level n-1

ReturnValue

The image pyramid in Image []

Link

http://www.emgu.com/wiki/files/2.4.2/document/html/0f10eb26-3f55-849c-b62b-1d7a5e8116d3.htm

 

2) Image<TColor, TDepth>.PyrDownMethod

Performs downsampling step of Gaussianpyramid decomposition. First it convolves this image with the specified filterand 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 Image<TColor, TDepth>PyrDown()

ReturnValue

The downsampled image

Link

http://www.emgu.com/wiki/files/2.0.1.0/html/2aaf7083-20e0-2de3-fc78-c361e4c6a211.htm

 

3) Image<TColor, TDepth>.PyrUpMethod

Namespace:  Emgu.CV
Assembly:  Emgu.CV (inEmgu.CV.dll) Version: 2.0.0.0 (2.0.0.0)

Syntax(C#)

public Image<TColor,TDepth> PyrUp()

ReturnValue

The upsampled image

Link

http://www.emgu.com/wiki/files/2.0.0.0/html/54e08a6f-3842-543b-125f-ae3d52392fe0.htm