<Mat - The Basic Image Container>

목적：OpenCV-based image processing and maniplulation

OpenCV 2.0부터　C++ interface가　도입되었으며，개발자는　메모리　관리를　신경쓸　필요　없이　Mat class　객체를　이용하여　이미지　데이터에　접근　가능

Mat 객체를　전달할　경우　기존에　할당된　메모리　영역　재사용　가능

Mat class 구성

• the matrix header (matrix size, the method for storing the data, the addr of the matrix, etc
• a pointer to the matrix (the matrix contains the pixel values )