Opencv Cv Mat

When the counter reaches zero the matrix is freed.

Opencv cv mat. The class mat tp is a thin template wrapper on top of the mat class. Thus references or pointers to these two classes can be freely but carefully converted one to another. The class mat represents an n dimensional dense numerical single channel or multi channel array. If efficiency is important a fast way to iterate over pixels in a cv mat object is to use its ptr t int r method to obtain a pointer to the beginning of row r 0 based index.

Generated on sun sep 27 2020 11 45 07 for opencv by 1 8 13 1 8 13. The cv mat data member points to the first element of the first row cv mat rows contains the number of matrix rows and cv mat cols the number of matrix columns. It can be used to store real or complex valued vectors and matrices grayscale or color images voxel volumes vector fields point clouds tensors histograms though very high dimensional histograms may be better stored in a sparsemat. Whenever a header is cleaned this counter is decreased.

Whenever somebody copies a header of a mat object a counter is increased for the matrix. It does not have any extra data fields. Nor this class nor mat has any virtual methods. According to the matrix type the pointer will have a different template.

Opencv efficient pixel access using cv mat ptr pointer example. N dimensional dense array class.