read_matrix — Read a matrix from a file.
The operator read_matrix reads a matrix, which has been written to the file with write_matrix, from the file FileName. The default HALCON file extension for the matrix is 'mtx'. The format of the file can be binary or ascii. Each row of the file contains one row of a matrix with a number of columns. The columns are separated with white spaces or tabs. Each row must have the same number of columns. Empty lines are ignored.
The reading results are stored in the matrix Matrix. The operator returns the matrix handle MatrixID of this matrix. Access to the elements of the matrix is possible e.g. with the operator get_full_matrix.
This operator returns a handle. Note that the state of an instance of this handle type may be changed by specific operators even though the handle is used as an input parameter by those operators.
File extension: .mtx
If the file name is valid, the operator read_matrix returns the value 2 (H_MSG_TRUE). If necessary an exception is raised.