Methods for calculating distance using depth sensor and apparatuses performing the same
First Claim
1. A method of calculating, using a depth sensor, a distance excluding an ambiguity distance, the method comprising:
- outputting a modulated light signal output from a light source to an object;
receiving a modulated light signal input from the object, the modulate light signal input being the modulated light signal output reflected by the object;
calculating a distance between the light source and the object using the modulated light signal input to photo gates in conjunction with demodulation signals supplied to the photo gates, the calculating including calculating, using the modulated light signal input, at least one distance farther than a maximum measurable distance; and
setting the at least one distance farther than the maximum measurable distance to be equal to the maximum measurable distance to remove the ambiguity distance.
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Abstract
A method of calculating, using a depth sensor, a distance excluding an ambiguity distance including outputting a modulated light signal output from a light source to an object, receiving the modulated light signal reflected by the object, calculating a distance between the light source and the object using the reflected modulated light signal input to photo gates in conjunction with demodulation signals supplied to the photo gates, the calculating including calculating, using the modulated light signal, at least one distance farther than a maximum measurable distance, and setting the at least one distance to be equal to the maximum measurable distance may be provided. A range of the distance farther than the maximum measurable distance can be determined according to a duty ratio of the modulated light signal.
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Citations
20 Claims
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1. A method of calculating, using a depth sensor, a distance excluding an ambiguity distance, the method comprising:
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outputting a modulated light signal output from a light source to an object; receiving a modulated light signal input from the object, the modulate light signal input being the modulated light signal output reflected by the object; calculating a distance between the light source and the object using the modulated light signal input to photo gates in conjunction with demodulation signals supplied to the photo gates, the calculating including calculating, using the modulated light signal input, at least one distance farther than a maximum measurable distance; and setting the at least one distance farther than the maximum measurable distance to be equal to the maximum measurable distance to remove the ambiguity distance. - View Dependent Claims (2, 3, 4, 5, 6, 14)
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7. An image processing system comprising:
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a light source configured to output a modulated light signal to an object; a depth sensor pixel configured to output a pixel signal using demodulation signals and the modulated light signal reflected by the object; a readout circuit configured to output image data corresponding to the pixel signal; and an image signal processor configured to calculate a distance between the light source and the object based on the image data, the image signal processor configured to calculate, using the modulated light signal, at least one distance farther than a maximum measurable distance to be a distance equal to the maximum measurable distance. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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15. A method of calculating a distance using a depth sensor comprising:
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outputting a modulated light signal output from a light source to an object; receiving, using an image sensor, a modulated light signal input from the object, the modulate light signal input being the modulated light signal output reflected by the object; generating, using the image sensor, image data in conjunction with demodulation signals; and processing, using an image signal processor, the image data to calculate a measured distance between the light source and the object such that at least one distance farther than a maximum measurable distance is set to be equal to a maximum measurable distance. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification