Image-based visibility measurement
First Claim
1. A system for measuring visibility, the system comprising:
- means for obtaining an image;
means for determining a lighting condition for the image;
means for calculating a visibility based on the image; and
means for adjusting the means for calculating based on the lighting condition.
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Abstract
The invention provides an image-based visibility measurement solution in which an image is used to calculate a visibility (visual range). In one embodiment, a lighting condition for the image is determined and the visibility calculation is adjusted based on the lighting condition. Further, the invention can obtain image data for a set of portions of the image and estimate a visual range based on each portion. The estimated visual ranges can be combined to calculate the visibility for the image. Still further, multiple metrics can be calculated, each of which is used to estimate a visual range. Subsequently, the visual ranges can be used to calculate the visibility for the image. Even further, configuration data that is based on a set of training images can be used to calculate the visibility for a new image. To this extent, the invention can incorporate the lighting condition, portions of the image having differing features, multiple metrics, and/or feedback through training images to accurately measure visibility based on an image.
86 Citations
29 Claims
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1. A system for measuring visibility, the system comprising:
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means for obtaining an image;
means for determining a lighting condition for the image;
means for calculating a visibility based on the image; and
means for adjusting the means for calculating based on the lighting condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for measuring visibility, the system comprising:
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means for obtaining an image;
means for obtaining image data for a set of portions of the image;
means for estimating a set of visual ranges, wherein each estimated visual range is based on the image data for one of the set of portions; and
means for calculating the visibility based on the set of visual ranges. - View Dependent Claims (10, 11, 12)
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13. A system for measuring visibility, the system comprising:
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means for obtaining an image;
means for calculating a plurality of metrics based on the image;
means for estimating a plurality of visual ranges, wherein each of the plurality of visual ranges is based on one of the plurality of metrics; and
means for calculating the visibility based on the plurality of visual ranges. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A system for measuring visibility, the system comprising:
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means for obtaining configuration data, wherein the configuration data is based on a set of training images;
means for obtaining a new image; and
means for calculating the visibility based on the configuration data and the new image. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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Specification