Pre-filter for object detection
First Claim
Patent Images
1. A method, comprising the steps of:
- applying, by the processor, a spatial filter to a portion of an image, the spatial filter comprising a plurality of test regions;
calculating, by the processor, for each of the test regions within the portion of the image a metric as a function of intensity within the test region;
determining, by the processor, for the portion of the image a filter value based on the metrics of each of the test regions; and
comparing, by the processor, the filter value with a threshold to identify a subsequent process that can be skipped.
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Abstract
A method of pre-processing an image to identify processes for subsequent processing of the image, comprising the steps of:
- a) investigating portions of the image using a spatial filter;
- b) calculating for a first plurality of regions within a portion of the image under investigation respective metrics as a function of intensity within those regions;
- c) selecting combinations of regions within the portion of the image under investigation and processing them to obtain a second plurality of filter values, where the second plurality is greater than the first plurality; and
- d) comparing the filter values with process thresholds for subsequent processes so as to identify subsequent processes that can be skipped.
7 Citations
24 Claims
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1. A method, comprising the steps of:
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applying, by the processor, a spatial filter to a portion of an image, the spatial filter comprising a plurality of test regions; calculating, by the processor, for each of the test regions within the portion of the image a metric as a function of intensity within the test region; determining, by the processor, for the portion of the image a filter value based on the metrics of each of the test regions; and comparing, by the processor, the filter value with a threshold to identify a subsequent process that can be skipped. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A system comprising:
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a memory; and a data processor to; apply a spatial filter to a portion of an image, the spatial filter comprising a plurality of test regions; calculate for each of the test regions within the portion of the image a metric as a function of intensity within the test region; determine for the portion of the image a filter value based on the metrics of each of the test regions; and compare, the filter value with a threshold to identify a subsequent process that can be skipped.
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24. A computer program stored in a computer readable medium that, when executed, enable a data processor to:
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apply a spatial filter to a portion of an image, the spatial filter comprising a plurality of test regions; calculate for each of the test regions within the portion of the image a metric as a function of intensity within the test region; determine for the portion of the image a filter value based on the metrics of each of the test regions; and compare, the filter value with a threshold to identify a subsequent process that can be skipped.
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Specification