People counting systems and methods
First Claim
Patent Images
1. An automated method for counting objects moving between spaces, the method comprising:
- obtaining digitized images of a region lying between two or more spaces;
in a data processor;
processing the digitized images to detect moving objects in the images;
for a period, accumulating a first count of those of the moving objects that cross a boundary of a defined area lying within the image in a direction into the defined area;
for the period, accumulating a second count of those of the moving objects that cross the boundary of the defined area in a direction out of the defined area; and
, computing an accuracy measure based at least in part on the first and second counts.
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Abstract
A system for counting a number of people or other moving objects entering or leaving a space has a camera which provides an image of an entrance to the space. A data processor identifies moving objects in the image. The data processor is configured to count people or other objects which enter or leave an area within the image for two or more segments of a boundary of the area. Accuracy of the counting system can be monitored by comparing the counts for the different segments.
89 Citations
25 Claims
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1. An automated method for counting objects moving between spaces, the method comprising:
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obtaining digitized images of a region lying between two or more spaces;
in a data processor;
processing the digitized images to detect moving objects in the images;
for a period, accumulating a first count of those of the moving objects that cross a boundary of a defined area lying within the image in a direction into the defined area;
for the period, accumulating a second count of those of the moving objects that cross the boundary of the defined area in a direction out of the defined area; and
,computing an accuracy measure based at least in part on the first and second counts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. Apparatus for counting people or other moving objects, the apparatus comprising:
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a data processor connected to receive digitized images of a region lying between two or more spaces, the data processor executing software instructions that cause the data processor to detect moving objects in the images;
a data store accessible to the data processor, the data store storing;
an area definition, the area definition defining a boundary of a defined area within the images, the boundary comprising a plurality of segments; and
,for each of the plurality of the segments an inbound moving object counter and an outbound moving object counter;
wherein the data processor is configured to;
each time a moving object crosses into the defined area across one of the segments, increment the corresponding one of the inbound moving object counters;
each time a moving object crosses out of the defined area across one of the segments, increment the corresponding one of the outbound moving object counters; and
,compute an accuracy measure based at least in part on a sum of the counts in the inbound moving object counters and a sum of the counts in the outbound moving object counters. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification