Accession Number : ADD014008

Title :   Whole Word, Phrase or Number Reading.

Descriptive Note : Patent, filed 28 May 86, patented 16 Aug 88,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : O'Hair, Mark A

Report Date : 16 Aug 1988

Pagination or Media Count : 10

Abstract : The image of a word is taken and the two-dimensional discrete Fourier transform of the image is computed. The transformed image is filtered to the first three harmonics, with both real and imaginary components. These components then make up a total of 49 unique vectors which defines a 49 orthogonal vector space. The vector space is normalized to unity and each image of a word or phrase defines a point within this 49 orthogonal, hypersphere. The same process is done to the image for the Fourier components, where there is only 25 unique vector components. Similar looking words cluster in the hypersphere and the smaller distance from one point to another defines the probability of incorrectly recognizing a word. In a study of the case of two through eleven letters in a word using both 49 and 25 vector space calculations, the results show two through eleven words are recognizable using 49 vector space and possibly the 25 vector space. The 25 vector space shows problems with symmetry (dyslexia) in many of the incorrectly recognized words, which was never the case for the 49 vector space. A conclusion is that people with dyslexia might use a different process to recognize words and by using the real and imaginary components whole word recognition is possible. Keywords: Patents. (KR)

Descriptors :   *WORD RECOGNITION, *PATENTS, *READING, *CHARACTER RECOGNITION, DISCRETE FOURIER TRANSFORMS, FOURIER ANALYSIS, HARMONICS, NUMBERS, TWO DIMENSIONAL, VECTOR ANALYSIS, VECTOR SPACES, WORDS(LANGUAGE)

Subject Categories : Recording and Playback Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE