Real-time image detection using polarization data
AssigneeIntergraph Technologies Company
InventorSheila Whitaker
Life of this patent
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Abstract
The present invention relates to a system and method of detecting polarized identification indicia in real-time. A frame of image data is provided having a plurality of pixels, wherein each pixel includes polarized light intensity information. An intensity value is determined for each of the pixels from the polarized light intensity information. A first portion of the pixels having intensity values within an intensity range is selected. The pixels in the first portion having similar angle of linear polarization values within a tolerance range are analyzed, thereby detecting the polarized identification indicia in the image data.
Claims32
A method of detecting polarized identification indicia in real-time comprising:
- providing a frame of image data having a plurality of pixels, wherein each pixel includes polarized light intensity information;
- determining an intensity value for each of the pixels from the polarized light intensity information;
- selecting a first portion of the pixels having intensity values within an intensity range;
- and
- analyzing the pixels in the first portion having similar angle of linear polarization values within a tolerance range, thereby detecting the polarized identification indicia in the image data.
A method of detecting polarized identification indicia in real-time comprising:
- providing a frame of image data having a plurality of pixels, wherein each pixel includes polarized light intensity information;
- determining an intensity value for each of the pixels from the polarized light intensity information;
- selecting a first portion of the pixels having intensity values within an intensity range;
- determining a degree of linear polarization value for each of the pixels in the first portion;
- selecting a second portion of the pixels from the first portion, the second portion having degree of linear polarization values within a degree of linear polarization range;
- and
- analyzing the pixels in the second portion having similar angle of linear polarization values within a tolerance range, thereby detecting the polarized identification indicia in the image data.
A computer program product for detecting polarized identification indicia in real-time, the computer program product comprising a computer usable medium having computer readable program code thereon, the computer readable program code comprising:
- program code for determining an intensity value for image data having a plurality of pixels, wherein each pixel includes polarized light intensity information;
- program code for selecting a first portion of the pixels having intensity values within an intensity range;
- and
- program code for analyzing the pixels in the first portion having angle of linear polarization values within a tolerance range, thereby detecting the polarized identification indicia in the image data.
A system of detecting polarized identification indicia in real-time comprising:
- an image device for receiving a frame of image data having a plurality of pixels, wherein each pixel includes polarized light intensity information;
- and
- an image processor for determining an intensity value for each of the pixels from the polarized light intensity information, selecting a first portion of the pixels having intensity values within an intensity range, and analyzing the pixels in the first portion having similar angle of linear polarization values within a tolerance range, thereby detecting the polarized identification indicia in the image data.
Dependencies are inferred from the claim text.