MOTION-SENSOR DEVICE HAVING MULTIPLE LIGHT SOURCES
First Claim
Patent Images
1. A motion sensor device comprising:
- an image sensor;
a plurality of light sources including first, second and third light sources, the first light source being arranged at a first distance from the image sensor in a first direction, the second light source being arranged at a second distance from the image sensor in a second direction, the third light source being arranged at a third distance from the image sensor in a third direction; and
a controller configured to control the image sensor and the plurality of light sources,wherein the controller is configured to;
make the image sensor capture a first frame with light emitted from the first light source at a first time;
make the image sensor capture a second frame with light emitted from the second light source at a second time;
make the image sensor capture a third frame with light emitted from the third light source at a third time;
obtain information about a distance to an object based on a plurality of images which have been gotten by capturing the first, second and third frames;
obtain multiple pieces of information about an estimated distance to the object based on information representing a direction of the object derived from at least one of the plurality of images and a luminance of the object derived from each of the plurality of images; and
determine the information about the distance based on the multiple pieces of estimated distance information, andthe second and third directions are different from each other, andthe first and second distances are different from each other.
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Abstract
A motion sensor device according to an embodiment of the present disclosure includes an image sensor (101) and LED light sources (102, 103). Using an image captured by the image sensor (101) when both of the LED light sources (102, 103) are turned ON and an image captured by the image sensor (101) when only the LED light source (103) is turned ON, the distance to an object is estimated based on the luminance ratio of the object.
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Citations
17 Claims
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1. A motion sensor device comprising:
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an image sensor; a plurality of light sources including first, second and third light sources, the first light source being arranged at a first distance from the image sensor in a first direction, the second light source being arranged at a second distance from the image sensor in a second direction, the third light source being arranged at a third distance from the image sensor in a third direction; and a controller configured to control the image sensor and the plurality of light sources, wherein the controller is configured to; make the image sensor capture a first frame with light emitted from the first light source at a first time; make the image sensor capture a second frame with light emitted from the second light source at a second time; make the image sensor capture a third frame with light emitted from the third light source at a third time; obtain information about a distance to an object based on a plurality of images which have been gotten by capturing the first, second and third frames; obtain multiple pieces of information about an estimated distance to the object based on information representing a direction of the object derived from at least one of the plurality of images and a luminance of the object derived from each of the plurality of images; and determine the information about the distance based on the multiple pieces of estimated distance information, and the second and third directions are different from each other, and the first and second distances are different from each other. - View Dependent Claims (3, 4, 14, 15, 16, 17)
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2. (canceled)
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5. A motion sensor device comprising:
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an image sensor; a plurality of light sources including first and second light sources, the first light source being arranged at a first distance from the image sensor in a first direction, the second light source being arranged at a second distance from the image sensor in a second direction; and a controller configured to control the image sensor and the plurality of light sources, wherein the controller is configured to; make the image sensor capture a first frame with light emitted from the first light source at a first time; make the image sensor capture a second frame with light emitted from both of the first and second light sources at a second time; and obtain information about an estimated distance to an object based on a plurality of images which have been gotten by capturing the first and second frames, and the first and second directions are different from each other and/or the first and second distances are different from each other.
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6. (canceled)
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7. A motion sensor device comprising:
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an image sensor; a plurality of light sources including first and second light sources, the first light source being arranged at a first distance from the image sensor in a first direction, the second light source being arranged at a second distance from the image sensor in a second direction; and a controller configured to control the image sensor and the plurality of light sources, wherein the controller is configured to; make the image sensor capture a first frame with light emitted from the first light source at a first time; make the image sensor capture a second frame with light emitted from the second light source at a second time; and obtain information representing a direction of the object based on a plurality of images which have been gotten by capturing the first and second frames, obtain a first piece of information about an estimated distance to the object based on a luminance of the object derived from each of the plurality of images, obtain a second piece of information about an estimated distance to the object by another method of measuring the distance, and obtain information about the distance to the object based on the first and second pieces of information about the estimated distance, and the first and second directions are different from each other and/or the first and second distances are different from each other. - View Dependent Claims (9, 10, 11, 12, 13)
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8. (canceled)
Specification