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
Life of this patent
Estimating the term…
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.
Claims20
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;
- and
- converting said deconstructed image sets into serial form for transmission.
The method of claim wherein said angular step size Δθ is a user input value.
A computer apparatus including a virtual processing component comprised of:
- a point cloud object instantiated from a class, wherein said point cloud object includes:
- attributes which are initialized to receive photogrammetric relevant parameter values;
- and
- an associated point cloud data structure;
- and
- processing capability to perform decimation, deconstruction, and reconstruction functions.
The computer apparatus of claim 11, wherein said point cloud data structure includes position values of a sensor, location parameters, and geographical coordinates of a scene and focal point captured by said point cloud data structure.
The computer apparatus of claim 12, which further includes a virtual processor with capability to perform a function to calculate horizontal distance of said focal point to said sensor to obtain orbital radius r.
The computer apparatus of claim 13 which further includes a virtual processor with capability to perform a function to calculate an orbital path corresponding to said radius r and said position values of said sensor.
Dependencies are inferred from the claim text.