Robust search for image features across image sequences exhibiti

Details Robust search for image features across image sequences exhibiti Robust search for image features across image sequences exhibiti

1996-02-07

1999-12-21

Bella, Matthew C.

Image analysis

Pattern recognition

Template matching

382151, 382199, 382203, G06K 948, G06K 968

Patent

active

060059788

ABSTRACT:
An apparatus and method for two-dimensional search for a model image within atest image that exploits edge-based matching of edge maps, followed by area-based matching of at least coarse resolution edge maps of respective multi-resolution edge-maps, to efficiently and accurately provide the position of at least one instance of the model image. The invention can find a location of the model image within each test image of a sequence of test images, even when there are non-uniform brightness changes in the test image due to process steps or lighting changes. The postion of each verified instance of the model image within the test image can be provided to an alignment device, a measurement device, or any other device that can use such position information.

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