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"The first thing you need to know about Mat is that you no longer need to manually allocate its memory and release it as soon as you do not need it. While doing this is still a possibility, most of the OpenCV functions will allocate its output data automatically. As a nice bonus if you pass on an already existing Mat object, which has already allocated the required space for the matrix, this will be reused. In other words we use at all times only as much memory as we need to perform the task."
