Object detection
First Claim
1. Image object detection apparatus in which test regions of a test image are compared with an image property model, a mask defining a subset of pixel positions within a test region;
- said apparatus comprising;
a comparator to compare pixel properties in said test image defined by said test regions with said image property model to detect a property difference between said image property model and a test region;
so that pixel property differences within said mask and pixel property differences outside said mask are combined with opposite respective polarities to form a difference value in respect of that test region, an object being detected in said test image at a test region corresponding to a lowest difference value between said image property model and pixels defined by that test region.
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Accused Products
Abstract
Image object detection apparatus in which test regions of a test image are compared with an image property model, a mask defining a subset of pixel positions within a test region, comprises means for comparing pixel properties in the test image defined by the test regions with the image property model to detect a property difference between the image property model and a test region; so that pixel property differences within the mask and pixel property differences outside the mask are combined with opposite respective polarities to form a difference value in respect of that test region, an object being detected in the test image at a test region corresponding to a lowest difference value between the image property model and pixels defined by the test region.
24 Citations
19 Claims
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1. Image object detection apparatus in which test regions of a test image are compared with an image property model, a mask defining a subset of pixel positions within a test region;
- said apparatus comprising;
a comparator to compare pixel properties in said test image defined by said test regions with said image property model to detect a property difference between said image property model and a test region; so that pixel property differences within said mask and pixel property differences outside said mask are combined with opposite respective polarities to form a difference value in respect of that test region, an object being detected in said test image at a test region corresponding to a lowest difference value between said image property model and pixels defined by that test region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- said apparatus comprising;
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18. An object detection method in which test regions of a test image are compared with an image property model, a mask defining a subset of pixel positions within a test region, said method comprising:
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using a processor to perform the step of comparing pixel properties in said test image defined by said test regions with said image property model to detect a property difference between said image property model and a test region so that pixel property differences within said mask and pixel property differences outside said mask are combined with opposite respective polarities to form a difference value in respect of that test region; and detecting an object in said test image at a test region corresponding to a lowest difference value between said image property model and pixels defined by said test region. - View Dependent Claims (19)
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Specification