Distance detection system and distance detection method
AssigneePegatron Corporation
InventorPo-Ching Hsu
Life of this patent
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Abstract
The disclosure provides a distance detection method and a distance detection system. The distance detection method includes: capturing multiple image frames at multiple timing points based on a field of view, in which the field of view includes an object, and each image frame includes a pixel corresponding to the object; obtaining a first and a second modulation presented by the pixel at the timing points; finding a first specific light-emitting unit and a second specific light-emitting unit based on the first modulation and the second modulation, respectively; and estimating a specific distance between the distance detection system and the object based on the first specific light-emitting unit and the second specific light-emitting unit.
Claims11
A distance detection system, comprising:
- a first light source having a first polarization direction and comprising a plurality of first light-emitting units, wherein each of the first light-emitting units emits a first light to illuminate a specific object based on the first polarization direction and a first modulation of the each of the first light-emitting units;
- a second light source having a second polarization direction and comprising a plurality of second light-emitting units, wherein each of the second light-emitting units emits a second light to illuminate the specific object based on the second polarization direction and a second modulation of the each of the second light-emitting units;
- an image capturing circuit configured to capture a plurality of image frames in a specific field of view at a plurality of timing points, wherein the specific object is within the specific field of view, and each of the image frames comprises a specific pixel corresponding to the specific object;
- and
- a processor coupled to the first light source, the second light source and the image capturing circuit and configured to:
- obtain a first specific modulation and a second specific modulation presented by the specific pixel at the timing points based on the image frames, wherein the first specific modulation corresponds to the first polarization direction, and the second specific modulation corresponds to the second polarization direction;
- find a first specific light-emitting unit among the first light-emitting units based on the first specific modulation and find a second specific light-emitting unit among the second light-emitting units based on the second specific modulation;
- and
- calculate a specific distance between the distance detection system and the specific object based on the first specific light-emitting unit and the second specific light-emitting unit.
A distance detection method adapted for a distance detection system, comprising:
- emitting a first light to illuminate a specific object by a plurality of first light-emitting units of a first light source respectively based on a first polarization direction and a first modulation of each of the first light-emitting units;
- emitting a second light to illuminate the specific object by a plurality of second light-emitting units of a second light source respectively based on a second polarization direction and a second modulation of each of the second light-emitting units;
- capturing a plurality of image frames in a specific field of view at a plurality of timing points by an image capturing circuit, wherein the specific object is within the specific field of view comprises, and each of the image frames comprises a specific pixel corresponding to the specific object;
- obtaining a first specific modulation and a second specific modulation presented by the specific pixel at the timing points by a processor based on the image frames, wherein the first specific modulation corresponds to the first polarization direction, and the second specific modulation corresponds to the second polarization direction;
- finding a first specific light-emitting unit among the first light-emitting units based on the first specific modulation by the processor and finding a second specific light-emitting unit among the second light-emitting units based on the second specific modulation by the processor;
- and
- calculating a specific distance between the distance detection system and the specific object based on the first specific light-emitting unit and the second specific light-emitting unit by the processor.
Dependencies are inferred from the claim text.