With this application PCD file will be saved and this file have following use:

The ability to store and process organized point cloud datasets – this is of extreme importance for real time applications, and research areas such as augmented reality, robotics, etc; binary mmap/munmap data types are the fastest possible way of loading and saving data to disk. storing different data types (all primitives supported: char, short, int, float, double) allows the point cloud data to be flexible and efficient with respect to storage and processing. Invalid point dimensions are usually stored as NAN types. n-D histograms for feature descriptors – very important for 3D perception/computer vision applications

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