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US 5,706,071 AGranted
Line of sight detection apparatus and an equipment having the line of sight detection apparatus
AssigneeCanon Kabushiki Kaisha
InventorTatsuyuki Tokunaga
Life of this patent
Estimating the term…
Abstract
A device for detecting a line of sight includes an image pick-up element for picking up an eyeball image of a user, a line of sight detection circuit for detecting the line of sight of the user by calculating an output from the image pick-up element, a maximum value detection circuit for detecting a maximum output value output from the image pick-up element, a comparison circuit for comparing the maximum value with a predetermined threshold value, and an inhibition circuit for inhibiting a line of sight detection operation of the line of sight detection circuit when the maximum value is smaller than the threshold value.
Claims37
A device for detecting a line of sight, comprising:
- a) image pick-up means for picking up an eyeball image of a user;
- b) line of sight detection means for detecting the line of sight of said user by calculating an output from said image pick-up means;
- c) maximum value detection means for detecting a maximum output value output from said image pick-up means;
- d) comparison means for comparing said maximum value with a predetermined threshold value;
- and
- e) inhibition means for inhibiting a line of sight detection operation of said line of sight detection means when said maximum value is smaller than said threshold value.
3 more elements
A device for detecting a line of sight, comprising:
- a) image pick-up means for picking up an eyeball image of a user;
- b) line of sight detection means for detecting the line of sight of said user on the basis of an output from said image pick-up means;
- c) maximum value detection means for detecting a maximum output value output from said image pick-up means;
- d) determination means for determining if said maximum value satisfies a predetermined condition;
- and
- e) inhibition means for inhibiting a line of sight detection operation of said line of sight detection means when said determination means determines that said maximum value does not satisfy said predetermined condition.
3 more elements
A device for detecting a line of sight, comprising:
- a) image pick-up means, having a plurality of picture elements, for picking up an eyeball image of a user;
- b) line of sight detection means for detecting the line of sight of said user on the basis of an output from said image pick-up means;
- c) determination means for determining if a picture element that satisfies a predetermined condition is present in said plurality of picture elements;
- and
- d) inhibition means for inhibiting a line of sight detection operation of said line of sight detection means when said determination means determines that any picture element that satisfies said predetermined condition is not present in said plurality of picture elements.
2 more elements
A device for detecting a line of sight, comprising:
- a) image pick-up means for picking up an eyeball image of a user;
- b) line of sight detection means for detecting the line of sight of said user on the basis of an output from said image pick-up means;
- c) maximum value detection means for detecting a maximum output value output from said image pick-up means;
- d) determination means for determining if said maximum value satisfies a predetermined condition;
- and
- e) line of sight detection control means for, when said determination means determines that said maximum value satisfies said predetermined condition, permitting a line of sight detection operation of said line of sight detection means, and for, when said determination means determines that said maximum value does not satisfy said predetermined condition, inhibiting the line of sight detection operation of said line of sight detection means.
3 more elements
A device for detecting a line of sight, comprising:
- a) an image pick-up element for picking up an eyeball image of a user;
- b) a line of sight detection circuit for detecting the line of sight of said user on the basis of an output from said image pick-up element;
- c) a maximum value detection circuit for detecting a maximum output value output from said image pick-up element;
- d) a determination circuit for determining if said maximum value satisfies a predetermined condition;
- and
- e) an inhibition circuit for inhibiting a line of sight detection operation of said line of sight detection circuit when said determination circuit determines that said maximum value does not satisfy said predetermined condition.
3 more elements
An equipment having a device for detecting a line of sight, comprising:
- a) image pick-up means for picking up an eyeball image of a user;
- b) line of sight detection means for detecting the line of sight of said user by calculating an output from said image pick-up means;
- c) maximum value detection means for detecting a maximum output value output from said image pick-up means;
- d) comparison means for comparing said maximum value with a predetermined threshold value;
- and
- e) inhibition means for inhibiting a line of sight detection operation of said line of sight detection means when said maximum value is smaller than said threshold value.
3 more elements
An equipment having a device for detecting a line of sight, comprising:
- a) image pick-up means for picking up an eyeball image of a user;
- b) line of sight detection means for detecting the line of sight of said user on the basis of an output from said image pick-up means;
- c) maximum value detection means for detecting a maximum output value output from said image pick-up means;
- d) determination means for determining if said maximum value satisfies a predetermined condition;
- and
- e) inhibition means for inhibiting a line of sight detection operation of said line of sight detection means when said determination means determines that said maximum value does not satisfy said predetermined condition.
3 more elements
Dependencies are inferred from the claim text.