Photogrammetric point cloud compression for tactical networks
AssigneeThe United States of America as represented by the Secretary of the Army
InventorsAndrew C Madison, Richard D Massaro, Clint B Smith
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Abstract
The invention is a method and system which uses photogrammetric data and functions to perform image-based deconstruction of 3D point cloud data sets. These standard image formats from associated metadata can be easily serialized, transmitted, and subsequently reconstructed using established stereo photogrammetric methods.
Claims14
A computer configured with instructions to perform processing and access memory to photogrammetrically compress point cloud data, wherein said instructions are comprised of the steps of:
- receiving a point cloud data set containing point cloud data points captured by a to sensor, wherein said point cloud data points represent position values of said sensor, location parameters, and geographical coordinates of images corresponding to said point cloud data set;
- receiving values representing position coordinates of a focal point;
- performing a function to create a first subset of point cloud data representing orbital radius r, wherein said orbital radius r is the horizontal distance from said focal point to said sensor;
- performing a function to obtain a second subset of point cloud data point values representing the orbital path corresponding to said radius r and said position values of said sensor;
- receiving a point decimation factor;
- receive an angular step size Δθ;
- eliminating a number of data points corresponding to said point decimation factor and creating a number of images corresponding to angular step size Δθ to create a number of deconstructed image sets;
- performing a quality verification by calculating an SSIM value for two or more deconstructed image sets each having a unique value for said angular step size Δθ, and comparing said SSIM values to select a value for said angular step size Δθ;
- and converting said deconstructed image sets into serial form for transmission.
A computer configured with instructions to perform processing and access memory to photogrammetrically compress point cloud data, wherein said instructions are comprised of the steps of:
- receiving a point cloud data set containing point cloud data points captured by a sensor, wherein said point cloud data points represent position values of said sensor, location parameters, and geographical coordinates of images corresponding to said point cloud data set;
- receiving values representing position coordinates of a focal point;
- performing a function to create a first subset of point cloud data representing orbital radius r, wherein said orbital radius r is the horizontal distance from said focal point to said sensor;
- performing a function to obtain a second subset of point cloud data point values representing the orbital path corresponding to said radius r and said position values of said sensor;
- receiving a point decimation factor;
- receive an angular step size Δθ;
- eliminating a number of data points corresponding to said point decimation factor and creating a number of images corresponding to angular step size Δθ to create a number of deconstructed image sets;
- performing a quality verification by calculating an SSIM value for two or more deconstructed image sets each having a unique value for said point decimation factor, and comparing said SSIM values to select a value for said point decimation factor;
- and converting said deconstructed image sets into serial form for transmission.
Dependencies are inferred from the claim text.