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US 12,754,296 B2Granted
Distance image generation device and distance image generation method
AssigneeCanon Kabushiki Kaisha
InventorHideyuki Ito
Life of this patent
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Abstract
A distance image generation device including an acquisition unit configured to acquire a micro-frame constituted by a one-bit signal based on incident light to a photoelectric conversion element, and a synthesis unit configured to generate a sub-frame constituted by a multi-bit signal by synthesizing a plurality of the micro-frames acquired in different periods from each other. In one ranging frame period, the synthesis unit generates a first sub-frame and a second sub-frame, used for generating one distance image. The number of the plurality of micro-frames synthesized when generating the first sub-frame and the number of the plurality of micro-frames synthesized when generating the second sub-frame are different from each other.
Claims19
A distance image generation device comprising:
- an acquisition unit configured to acquire a micro-frame constituted by a one-bit signal based on incident light to a photoelectric conversion element;
- and
- a synthesis unit configured to generate a sub-frame constituted by a multi-bit signal by synthesizing a plurality of the micro-frames acquired in different periods from each other,
- wherein in one ranging frame period, the synthesis unit generates a first sub-frame and a second sub-frame, used for generating one distance image, and
- wherein the number of the plurality of micro-frames synthesized when generating the first sub-frame and the number of the plurality of micro-frames synthesized when generating the second sub-frame are different from each other,
- wherein each of the first sub-frame and the second sub-frame is associated with a distance between the photoelectric conversion element and an object,
- wherein the synthesis unit generates either the first sub-frame or the second sub-frame according to the distance,
- wherein the number of the plurality of micro-frames synthesized when generating the second sub-frame is less than the number of the plurality of micro-frames synthesized when generating the first sub-frame, and
- wherein the synthesis unit generates the first sub-frame when the distance is equal to or less than a predetermined threshold value, and generates the second sub-frame when the distance is greater than the predetermined threshold value.
6 more elements
A distance image generation device comprising:
- an acquisition unit configured to acquire a micro-frame constituted by a one-bit signal based on incident light to a photoelectric conversion element;
- and
- a synthesis unit configured to generate a sub-frame constituted by a multi-bit signal by synthesizing a plurality of the micro-frames acquired in different periods from each other,
- wherein in one ranging frame period, the synthesis unit generates a first sub-frame and a second sub-frame, used for generating one distance image, and
- wherein the number of the plurality of micro-frames synthesized when generating the first sub-frame and the number of the plurality of micro-frames synthesized when generating the second sub-frame are different from each other,
- wherein each of the first sub-frame and the second sub-frame is associated with a distance between the photoelectric conversion element and an object,
- wherein the synthesis unit generates either the first sub-frame or the second sub-frame according to the distance,
- wherein the number of the plurality of micro-frames synthesized when generating the second sub-frame is less than the number of the plurality of micro-frames synthesized when generating the first sub-frame, and
- wherein the synthesis unit generates the first sub-frame when the distance is greater than a predetermined threshold value, and generates the second sub-frame when the distance is equal to or less than the predetermined threshold value.
6 more elements
A distance image generation device comprising:
- an acquisition unit configured to acquire a micro-frame constituted by a one-bit signal based on incident light to a photoelectric conversion element;
- and
- a synthesis unit configured to generate a sub-frame constituted by a multi-bit signal by synthesizing a plurality of the micro-frames acquired in different periods from each other,
- wherein in one ranging frame period, the synthesis unit generates a first sub-frame and a second sub-frame, used for generating one distance image,
- wherein the number of the plurality of micro-frames synthesized when generating the first sub-frame and the number of the plurality of micro-frames synthesized when generating the second sub-frame are different from each other,
- wherein the distance image generation device further comprising a distance image generation unit configured to generate a distance image indicating a distance to an object based on the multi-bit signal of each of the first sub-frame and the second sub-frame, and
- wherein the distance image generation unit generates the distance image after correcting a gradation of at least one of the first sub-frame and the second sub-frame.
4 more elements
Dependencies are inferred from the claim text.