Method for detecting repetitive surfaces in an optical mouse

Details Method for detecting repetitive surfaces in an optical mouse Method for detecting repetitive surfaces in an optical mouse

2007-08-28

2007-08-28

Bella, Matthew C. (Department: 2624)

Image analysis

Image transformation or preprocessing

Correlation

C382S209000, C382S219000, C358S464000, C345S640000

Reexamination Certificate

active

10350722

ABSTRACT:
A repetitive surface detector includes an image capture device capturing an image. An autocorrelator receives the image and generates a signal indicative of a repetitive background of the image. A controller determines a maximum and minimum value in the auto-correlated signal. An adder determines the signed difference between the maximum and minimum value. A comparator compares the signed difference with a threshold and generates an output that indicates when the image includes a repetitive background.

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