Replacement sensor model for optimal image exploitation
First Claim
1. A method for generating a replacement sensor model data file for use in processing image data produced by an image sensor, the method comprising:
- generating parameters of a ground-to-image transformation function based on a sensor model of the image sensor, the sensor model including support data describing physical characteristics of the image sensor;
defining adjustable parameters of the ground-to-image transformation function to reflect errors in the support data;
generating an adjustment error covariance based on the adjustable parameters and containing information approximately equivalent to information contained in a support data error covariance; and
outputting the data file, wherein the data file includes the parameters, the adjustable parameters and the adjustment error covariance.
4 Assignments
0 Petitions
Accused Products
Abstract
A replacement sensor model for optimally exploiting imaging data obtained by an image sensor. The replacement sensor model includes a ground-to-image function such as a polynomial for converting three-dimensional ground point data to two-dimensional image (pixel) data. Coefficients of the polynomial can be determined from a rigorous sensor model of the image sensor, which reflects physical characteristics of the particular image sensor. The polynomial can be adjusted by an adjustment vector. The adjustment vector can be determined from a pre-determined list of possible adjustment components having particular characteristics relating to the image sensor and reflecting errors in the physical characteristics of the image sensor as included in the rigorous sensor model. Finally, an error covariance associated with the adjustment vector can be determined from an error covariance associated with the rigorous sensor model. The adjusted polynomial and error covariance of the replacement sensor model permit optimal image exploitation, including error propagation and geopositioning.
39 Citations
16 Claims
-
1. A method for generating a replacement sensor model data file for use in processing image data produced by an image sensor, the method comprising:
-
generating parameters of a ground-to-image transformation function based on a sensor model of the image sensor, the sensor model including support data describing physical characteristics of the image sensor; defining adjustable parameters of the ground-to-image transformation function to reflect errors in the support data; generating an adjustment error covariance based on the adjustable parameters and containing information approximately equivalent to information contained in a support data error covariance; and outputting the data file, wherein the data file includes the parameters, the adjustable parameters and the adjustment error covariance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A replacement sensor model for generating a replacement sensor model data file for use in image data processing, comprising:
-
A ground-to-image function for processing ground data obtained by an image sensor, the function being generated from data describing physical characteristics of the image sensor; An adjustment vector for adjusting the function so as to reflect errors in the data; An error covariance associated with the adjustment vector that contains approximately the same information as an error covariance of a rigorous sensor model of the image sensor; and An output function for outputting the data file.
-
-
13. A system for generating a replacement sensor model data file for use in processing image data produced by an image sensor, the system comprising:
-
a processor; a memory, operatively coupled to the processor, for storing logical instructions wherein execution of the logical instructions by the processor results in the performing of at least the following operations; generating parameters of a ground-to-image transformation function based on a sensor model of the image sensor, the sensor model including support data describing physical characteristics of the image sensor; defining adjustable parameters of the ground-to-image transformation function to reflect errors in the support data; generating an adjustment error covariance based on the adjustable parameters and containing information approximately equivalent to information contained in a support data error covariance; and outputting the data file, wherein the data file includes the parameters, the adjustable parameters and the adjustment error covariance. - View Dependent Claims (14, 15, 16)
-
Specification