Pre-filter for object detection
AssigneeHewlett-Packard Development Company, L.P.
InventorDarryl Greig
Life of this patent
Estimating the term…
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.
Claims24
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.
A system comprising:
- 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.
A computer program stored in a computer readable medium that, when executed, enable 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.
Dependencies are inferred from the claim text.