Optical image encoding and comparing using scan autocorrelation
First Claim
1. A system for encoding information from the optical image of a camera, comprising,(a) means for representing a predetermined characteristic of said image by an array of values,(b) means for sampling an ordered sequence of the values of said array, and for marking transitions in said ordered sequence by a sequence of marker values, and(c) means for autocorrelating said sequence of marker values to provide an autocorrelation function for said sequence of marker values, and thus for said ordered sequence.
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Abstract
A method for encoding shape and pattern information from the image (20) of an electronic camera (10). The image is converted into a discrete array of values (30), and the values in the cross sections of the array are sampled (circuit 40), marked for transitions (circuit 50), and the transition markers are then autocorrelated by circuit 60 to form an autocorrelation function for each cross section. The autocorrelation functions corresponding to each cross section are then combined by circuit 70 into a global summary function, which provides a quantitative measure of the information contained in the image. The global summary functions which are derived from images may be used to judge their similarity or otherwise compare and classify them.
32 Citations
20 Claims
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1. A system for encoding information from the optical image of a camera, comprising,
(a) means for representing a predetermined characteristic of said image by an array of values, (b) means for sampling an ordered sequence of the values of said array, and for marking transitions in said ordered sequence by a sequence of marker values, and (c) means for autocorrelating said sequence of marker values to provide an autocorrelation function for said sequence of marker values, and thus for said ordered sequence.
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19. A system for encoding and combining information from the optical image of a camera, comprising,
(a) means for representing predetermined characteristics of said image by an array of values, (b) means for preselecting a plurality of ordered sequences of values of said array, (c) means for sampling each member of said plurality of ordered sequences, and for autocorrelating each member of said plurality to produce a coresponding plurality of autocorrelation functions, and (d) means for algebraically combining said plurality of autocorrelation functions into a single summary function for said array and thus for said image.
Specification