Methods and systems for scanning and inspecting images

  • US 4,984,073 A
  • Filed: 09/15/1986
  • Issued: 01/08/1991
  • Est. Priority Date: 12/24/1954
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for inspecting an image field to determine if discrete image shapes are present in said image field, comprising:

  • (a) scanning an image field containing a plurality of discrete image shapes represented by optically contrasting image portions which are detectable with an electro-optical scanning means,(b) generating first electrical signals which vary in accordance with variations in the optical characteristics of the image field scanned,(c) analyzing said first electrical signals and generating first information signals corresponding to the optical characteristics of the image field scanned,(d) electrically comparing said first information signals with signals from recordings in a memory which are indicative of said discrete image shapes, and(e) generating digital signals indicative of the presence of said discrete image shapes in said scanned image field each time a discrete image shape is scanned.

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