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DETAIL BOUNDARY DETECTION SYSTEMS

  • US 3,696,249 A
  • Filed: 09/14/1970
  • Issued: 10/03/1972
  • Est. Priority Date: 09/14/1970
  • Status: Expired due to Term
First Claim
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1. A system for detecting significant detail boundaries contained on an object and for producing lines representative of said detail boundaries comprising:

  • a. means for systematically scanning said object;

    b. means for sequentially examining a large plurality of separate two-dimensional areas of said object during the scanning thereof, said examining means including;

    1. means for receiving the radiant energy emanating from a plurality of area sub-divisions of each of said twodimensional areas and for producing a plurality of output signal values each of which are a function of the level of radiant energy emanating from a different one of said plurality of area sub-divisions; and

    2. means for analyzing said plurality of output signal values and for producing a gradient detection signal dependent upon differences between said plurality of output signal values, which differences result from and indicate the presence of one or more significant detail boundaries within each of said twodimensional areas, said analyzing means further including gradient orientation detection means for detecting the orientation of said indicated detail boundaries within each of said two-dimensional areas independent of the direction of scan of said scanning means; and

    c. output means coupled to said analyzing means for producing lines representative of said significant detail boundaries.

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