OpenVX基本视觉功能 1.输入输出表 OpenVX附带了一组标准的或基本的视觉功能。表2-1列出了支持的视觉功能集、输入类型（见表2-1）和输出类型（见表2-2），以及支持的OpenVX版本。
表2-1 OpenVX视觉功能输入参数
|
视觉功能 |
U1 |
S8 |
U8 |
U16 |
S16 |
U32 |
F32 |
颜色 |
其他 |
|
AbsDiff |
|
|
1.0 |
|
1.0.1 |
|
|
|
|
|
Add |
|
|
1.0 |
|
1.0 |
|
|
|
|
|
And |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
BilateralFilter |
|
|
1.2 |
|
1.2 |
|
|
|
|
|
Box3x3 |
|
|
1.0 |
|
|
|
|
|
|
|
CannyEdgeDetector |
|
|
1.0 |
|
|
|
|
|
|
|
ChannelCombine |
|
|
1.0 |
|
|
|
|
|
|
|
ChannelExtract |
|
|
|
|
|
|
|
1.0 |
|
|
ColorConvert |
|
|
|
|
|
|
|
1.0 |
|
|
ConvertDepth |
1.3 |
|
1.0 |
|
1.0 |
|
|
|
|
|
Convolve |
|
|
1.0 |
|
|
|
|
|
|
|
Copy (image object) |
|
|
|
|
|
|
|
|
1.2 |
|
Dilate3x3 |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
EqualizeHist |
|
|
1.0 |
|
|
|
|
|
|
|
Erode3x3 |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
FastCorners |
|
|
1.0 |
|
|
|
|
|
|
|
Gaussian3x3 |
|
|
1.0 |
|
|
|
|
|
|
|
GaussianPyramid |
|
|
1.0 |
|
|
|
|
|
|
|
HarrisCorners |
|
|
1.0 |
|
|
|
|
|
|
|
HalfScaleGaussian |
|
|
1.0 |
|
|
|
|
|
|
|
HarrisCorners |
|
|
1.0 |
|
|
|
|
|
|
|
HOGCells |
|
|
1.2 |
|
|
|
|
|
|
|
HOGFeatures |
|
|
1.2 |
|
|
|
|
|
|
|
HoughLinesP |
1.3 |
|
1.2 |
|
|
|
|
|
|
|
IntegralImage |
|
|
1.0 |
|
|
|
|
|
|
|
LaplacianPyramid |
|
|
1.1 |
|
|
|
|
|
|
|
LaplacianReconstruct |
|
|
|
|
1.1 |
|
|
|
|
|
LBP |
|
|
1.2 |
|
|
|
|
|
|
|
Magnitude |
|
|
|
|
1.0 |
|
|
|
|
|
MatchTemplate |
|
|
1.2 |
|
|
|
|
|
|
|
MeanStdDev |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
Median3x3 |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
Max |
|
|
1.2 |
|
1.2 |
|
|
|
|
|
Min |
|
|
1.2 |
|
1.2 |
|
|
|
|
|
MinMaxLoc |
|
|
1.0 |
|
1.0 |
|
|
|
|
|
Multiply |
|
|
1.0 |
|
1.0 |
|
|
|
|
|
NonLinearFilter |
1.3 |
|
1.1 |
|
|
|
|
|
|
|
NonMaxSuppression |
1.3 |
|
1.2 |
|
1.2 |
|
|
|
|
|
Not |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
OpticalFlowPyrLK |
|
|
1.0 |
|
|
|
|
|
|
|
Or |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
Phase |
|
|
|
|
1.0 |
|
|
|
|
|
Remap |
|
|
1.0 |
|
|
|
|
|
|
|
ScaleImage |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
Sobel3x3 |
|
|
1.0 |
|
|
|
|
|
|
|
Subtract |
|
|
1.0 |
|
1.0 |
|
|
|
|
|
TableLookup |
|
|
1.0 |
|
1.1 |
|
|
|
|
|
TensorMultiply |
|
1.2 |
1.2 |
|
1.2 |
|
|
|
|
|
TensorAdd |
|
1.2 |
1.2 |
|
1.2 |
|
|
|
|
|
TensorSubtract |
|
1.2 |
1.2 |
|
1.2 |
|
|
|
|
|
TensorMatrixMultiply |
|
1.2 |
1.2 |
|
1.2 |
|
|
|
|
|
TensorTableLookup |
|
1.2 |
1.2 |
|
1.2 |
|
|
|
|
|
TensorTranspose |
|
1.2 |
1.2 |
|
1.2 |
|
|
|
|
|
Threshold |
|
|
1.0 |
|
1.1 |
|
|
|
|
|
WarpAffine |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
WarpPerspective |
|
|
1.0 |
|
|
|
|
|
|
|
WeightedAverage |
|
|
1.3 |
|
|
|
|
|
|
|
Xor |
1.3 |
|
1.0 |
|
|
|
|
|
|
表2-2 OpenVX视觉功能输出参数
|
视觉功能 |
U1 |
S8 |
U8 |
U16 |
S16 |
U32 |
F32 |
颜色 |
其它 |
|
AbsDiff |
|
|
1.0 |
|
1.0.1 |
|
|
|
|
|
Add |
|
|
1.0 |
|
1.0 |
|
|
|
|
|
And |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
BilateralFilter |
|
|
1.2 |
|
1.2 |
|
|
|
|
|
Box3x3 |
|
|
1.0 |
|
|
|
|
|
|
|
CannyEdgeDetector |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
ChannelCombine |
|
|
|
|
|
|
|
1.0 |
|
|
ChannelExtract |
|
|
1.0 |
|
|
|
|
|
|
|
ColorConvert |
|
|
|
|
|
|
|
1.0 |
|
|
ConvertDepth |
1.3 |
|
1.0 |
|
1.0 |
|
|
|
|
|
Convolve |
|
|
1.0 |
|
1.0 |
|
|
|
|
|
Copy (图像目标) |
|
|
|
|
|
|
|
|
1.2 |
|
Dilate3x3 |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
EqualizeHist |
|
|
1.0 |
|
|
|
|
|
|
|
Erode3x3 |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
FastCorners |
|
|
1.0 |
|
|
|
|
|
|
|
Gaussian3x3 |
|
|
1.0 |
|
|
|
|
|
|
|
GaussianPyramid |
|
|
1.0 |
|
|
|
|
|
|
|
HarrisCorners |
|
|
1.0 |
|
|
|
|
|
|
|
HalfScaleGaussian |
|
|
1.0 |
|
|
|
|
|
|
|
HarrisCorners |
|
|
|
|
|
1.0 |
|
|
|
|
HOGCells |
|
1.2 |
|
|
1.2 |
|
|
|
|
|
HOGFeatures |
|
1.2 |
|
|
1.2 |
|
|
|
|
|
HoughLinesP |
|
|
|
|
|
|
|
|
1.2 |
|
IntegralImage |
|
|
|
|
|
1.0 |
|
|
|
|
LaplacianPyramid |
|
|
|
|
1.1 |
|
|
|
|
|
LaplacianReconstruct |
|
|
1.1 |
|
|
|
|
|
|
|
LBP |
|
|
1.2 |
|
|
|
|
|
|
|
Magnitude |
|
|
|
|
1.0 |
|
|
|
|
|
MatchTemplate |
|
|
1.2 |
|
|
|
|
|
|
|
MeanStdDev |
|
|
|
|
|
|
1.0 |
|
|
|
Median3x3 |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
Max |
|
|
1.2 |
|
1.2 |
|
|
|
|
|
Min |
|
|
1.2 |
|
1.2 |
|
|
|
|
|
MinMaxLoc |
|
|
1.0 |
|
1.0 |
1.0 |
|
|
|
|
Multiply |
|
|
1.0 |
|
1.0 |
|
|
|
|
|
NonLinearFilter |
1.3 |
|
1.1 |
|
|
|
|
|
|
|
NonMaxSuppression |
|
|
1.2 |
|
1.2 |
|
|
|
|
|
Not |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
OpticalFlowPyrLK |
|
|
|
|
|
|
|
|
|
|
Or |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
Phase |
|
|
1.0 |
|
|
|
|
|
|
|
Remap |
|
|
1.0 |
|
|
|
|
|
|
|
ScaleImage |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
Sobel3x3 |
|
|
|
|
1.0 |
|
|
|
|
|
Subtract |
|
|
1.0 |
|
1.0 |
|
|
|
|
|
TableLookup |
|
|
1.0 |
|
1.1 |
|
|
|
|
|
TensorMultiply |
|
1.2 |
1.2 |
|
1.2 |
|
|
|
|
|
TensorAdd |
|
1.2 |
1.2 |
|
1.2 |
|
|
|
|
|
TensorSubtract |
|
1.2 |
1.2 |
|
1.2 |
|
|
|
|
|
TensorMatrixMultiply |
|
1.2 |
1.2 |
|
1.2 |
|
|
|
|
|
TensorTableLookup |
|
1.2 |
1.2 |
|
1.2 |
|
|
|
|
|
TensorTranspose |
|
1.2 |
1.2 |
|
1.2 |
|
|
|
|
|
Threshold |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
WarpAffine |
1.3 |
|
1.0 |
|
|
|
|
|
|
|
WarpPerspective |
|
|
1.0 |
|
|
|
|
|
|
|
WeightedAverage |
|
|
1.3 |
|
|
|
|
|
|
|
Xor |
1.3 |
|
1.0 |
|
|
|
|
|
|
图2-7.OpenVX 上下文的生命周期模型
2.14.2.图形生命周期
如图2-8所示，OpenVX在图形生命周期中，有以下四个主要阶段。
1）构造：图形通过vxCreateGraph创建，节点通过数据对象连接在一起。
2）验证：检查图表的一致性、正确性和其他条件。可能会发生内存分配。
3）执行：图形通过vxProcessGraph或vxScheduleGraph执行。执行之间的数据可以由客户端，或一些其他外部机制更新。OpenVX的客户端可以将输入数据的引用更改为图形，但这可能需要通过检查vxIsGraphVerified，再次验证图形。
4）解构：图形通过vxReleaseGraph发布。将释放图形中的所有节点。
图2-8.图形生命周期
2.14.3.数据对象生命周期
OpenVX中的所有对象都遵循类似的生命周期模型。所有对象都是
1）通过vxCreate＜Object＞＜Method＞创建，或通过vxGet＜Object＞＞＜Method>，从父对象检索（如果它们是内部创建的）。
2）根据需要在图形或直接函数中使用。
3）当释放所有对象时，必须通过vxRelease＜Object＞，或通过vxReleaseContext释放对象。
OpenVX图像生命周期
这是使用OpenVX框架API的图像生命周期示例。这也适用于更改了类型和函数名的其他数据类型，如图2-9所示。
图 2-9.图像对象生命周期
参考文献链接
https://registry.khronos.org/OpenVX/specs/1.3.1/html/OpenVX_Specification_1_3_1.html#_functions_38
标签：功能,生命周期,OpenVX,1.1,1.2,1.3,视觉,1.0
From： https://www.cnblogs.com/wujianming-110117/p/18286414