Notes on opencv data types

1.  basic built-in data types, such as int、float、double etc;

2.  helper objects, such as garbage-collecting pointer class、range objects etc;

3.  large array types, such as cv::Mat、cv::SparseMat;

4.  small array types, such as cv::Vec<>, cv::Matx<> , cv::Point<> etc;

5. STL，standard template library, especially std::vector<>;

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1. small fixed array types:

●  cv::Vec{2, 3, 4, 6}{b, w, s, i, f, d};

●  cv::Matx{1, 2, 3, 4, 6}{1, 2, 3, 4, 6}{f,d};

●  cv::Point{2, 3}{i, f, d};

●  cv::Scalar derived from cv::Vec<double, 4>;

● cv::Size2i == cv::Size, cv::Size2f;

● cv::Rect, cv::RotatedRect;

● cv::Complex{f,d}

2. Helper types:

◆ cv::DataType<>, helps us to comunicate type-information to the library

     functions.