Device for detecting line of sight
First Claim
Patent Images
1. A device for detecting a shape of a region of an eyeball, said device comprising:
- a) detection means for detecting boundary position information for a boundary between a first region and a second region of the eyeball, said boundary divided into areas that each include plural boundary position information, wherein the boundary between the first and second regions is substantially circular;
b) selection means for selecting at least one area among the plurality of areas of the boundary detected by said detection means based on a predetermined threshold; and
c) calculation means for estimating an external shape of the first region by utilizing the boundary position information for the area of the boundary selected by said selection means.
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Abstract
A device is provided device for detecting the line of sight of an observer, based on the positions of the Purkinje'"'"'s image and of the center of the pupil circle. The device is capable, in determining the pupil circle from the pupil edge data collected from the image sensor, of preventing erroneous estimation of the pupil circle resulting from false noise data, by partially excluding or adding the edge data in the estimation process of the pupil circle and evaluating the reliability of the obtained estimated circle.
26 Citations
75 Claims
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1. A device for detecting a shape of a region of an eyeball, said device comprising:
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a) detection means for detecting boundary position information for a boundary between a first region and a second region of the eyeball, said boundary divided into areas that each include plural boundary position information, wherein the boundary between the first and second regions is substantially circular; b) selection means for selecting at least one area among the plurality of areas of the boundary detected by said detection means based on a predetermined threshold; and c) calculation means for estimating an external shape of the first region by utilizing the boundary position information for the area of the boundary selected by said selection means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A device for detecting a shape of a region of an eyeball, said device comprising:
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a) detection means for detecting data indicative of a boundary between a first region and a second region of the eyeball, wherein the boundary is substantially circular; b) first calculation means for calculating a respective estimated error of each of said plurality of boundary data; c) determining means for determining which boundary data has the greatest effect on an overall estimated error associated with an estimated shape of the first region; and d) second calculation means for calculating an estimated external shape of the first region utilizing a portion of the boundary data excluding the boundary data having the greatest effect on the overall estimated error from said boundary data. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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32. A device for detecting a line of sight of an eyeball, comprising:
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a) detection means for detecting data indicative of a boundary between a first region and a second region of the eyeball, wherein the boundary is substantially circular; b) first calculation means for calculating a respective estimated error of each of said plurality of boundary data; c) estimating means for estimating an external shape of the first region by selectively utilizing a portion of the boundary data so that an overall estimated error associated with the shape estimate is below a predetermined threshold; and d) second calculation means for calculating a line of sight using the shape estimated by said estimating means. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. A device for detecting a shape of a region of an eyeball, comprising:
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a) detection means for detecting a plurality of boundary position information between a first region and a second region of the eyeball, wherein a boundary between the first region and the second region is substantially circular; b) grouping means for dividing the detected plural boundary position information into a plurality of groups, each group consisting of a plurality of boundary position information; c) selection means for selecting a group which satisfies a predetermined condition from among the plural groups; and d) calculation means for estimating an external shape of the first region only based on the plurality of boundary position information included in the group selected by said selection means. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53, 54)
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55. A device for detecting a shape of a region of an eyeball, comprising:
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a) detection means for detecting plural boundary position information between a first region and a second region of the eyeball, wherein a boundary between the first region and the second region is substantially circular; b) grouping means for dividing the detected plural boundary position information into a plurality of groups, each group consisting of plural boundary position information; c) first calculation means for estimating an external shape of the first region by selectively excluding one of the groups among the plurality of groups, said first calculation means changing the group to be excluded and performing the calculation a plurality of times; and d) first evaluation means for evaluating a reliability of the respective external shape of the first region estimated by said first calculation means for each calculation; wherein a shape of the region of the eyeball is detected by utilizing at least the plural boundary position information included in the plural groups which said first evaluation means evaluates as having the highest reliability. - View Dependent Claims (56, 57, 58, 59, 60, 61, 62, 63, 64)
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65. A device for detecting a shape of a region of an eyeball, comprising:
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a) detection means for detecting plural boundary position information between a first region and a second region of the eyeball, wherein a boundary between the first region and the second region is substantially circular; b) calculation means for estimating an external shape of the first region based on the plural boundary position information; c) determining means for determining a reliability of the plural boundary position information based on whether the respective boundary position information included in the plural boundary position information is located at the same circumference; and d) changing means for changing determination criterion of said determining means based on a size of the external shape of the first region estimated by said calculation means. - View Dependent Claims (66, 67, 68, 69, 70, 71, 72, 73, 74, 75)
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Specification