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Eye position detecting apparatus

  • US 5,218,387 A
  • Filed: 05/20/1991
  • Issued: 06/08/1993
  • Est. Priority Date: 05/21/1990
  • Status: Expired due to Term
First Claim
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1. An eye position detecting apparatus comprising:

  • image input means for inputting an image of a face including eyes; and

    a microcomputer, the microcomputer including;

    image converting means for converting the inputted image into a binary coded image formed by an array of pixels, each of the pixels having a first value indicating a black pixel or a second value indicating a white pixel, and each being located at a position specified by coordinates (X,Y); and

    detecting means for processing the binary coded image to detect first and second rectangular regions including image portions representing the eyes, respectively, each of the first and second rectangular regions being specified by two X coordinates, the detecting means including;

    first means for scanning the binary coded image in a series of horizontal scan lines to detect the X and Y coordinates of initial and final pixels of a line segment representing the longest width of the face;

    second means for calculating the X coordinates of each of the first and second rectangular regions based upon the detected X coordinates of the initial and final pixels;

    third means for scanning an image portion above the line segment to detect the Y coordinate of a lowermost one of pixels forming black image portions; and

    fourth means for calculating the Y coordinates of the first and second rectangular regions based upon the detected Y coordinate of the lowermost pixel.

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