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Method and device for correcting tap inconsistency of multi-tap pixel sensor and tof camera

A pixel sensor and correction method technology, applied in the field of distance measurement, can solve the problems of increasing the amount of data and exposure time, reducing the depth frame rate, etc., to achieve the effect of increasing the real-time depth frame rate, optimizing the depth effect, and reducing the amount of data

Active Publication Date: 2022-03-04
SHENZHEN ORBBEC CO LTD
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Problems solved by technology

However, multiple exposures will increase the amount of data and exposure time, thereby reducing the real-time depth frame rate

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  • Method and device for correcting tap inconsistency of multi-tap pixel sensor and tof camera
  • Method and device for correcting tap inconsistency of multi-tap pixel sensor and tof camera

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Embodiment Construction

[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0039] It should be noted that the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of these features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0040] figure 1 It is a schematic flowchart of a method...

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Abstract

The invention discloses a tap inconsistency correction method and device of a multi-tap pixel sensor and a TOF camera, comprising: emitting a pulse beam to a target object; collecting a charge signal of the pulse beam reflected back by the target object through an image sensor; wherein, The image sensor includes at least one pixel, and each pixel includes at least two taps; gray-scale value conversion is performed according to the charge signal to obtain the real gray-scale value of each tap under the irradiation of pulse beams of different intensities; The corresponding relationship between the real gray value and the ideal gray value, the fitting function, and the calibration coefficient of each tap. The present invention uses the taps to collect the charge corresponding to the pulsed light beams of different intensities, converts the charge into a gray value, and then calculates the correction coefficient of each tap, so that the correction coefficient is directly applied to the tap during the subsequent depth calculation. To correct the gray value of the tap, thereby improving the real-time depth frame rate, and optimizing the depth effect at the same time.

Description

technical field [0001] The present invention relates to the technical field of ranging, in particular to a method and device for correcting tap inconsistency of a multi-tap pixel sensor and a TOF camera. Background technique [0002] The full name of ToF is Time-of-Flight, that is, time of flight. The ToF ranging method is a technology that achieves precise ranging by measuring the round-trip flight time of light pulses between the transmitting / receiving device and the target object. In ToF technology, the technology that directly measures the time of flight of light is called dToF (direct-TOF, direct time-of-flight) technology; while periodically modulating the emitted optical signal, by adjusting the phase of the reflected optical signal relative to the emitted optical signal The measurement technology that measures the delay and then calculates the time of flight from the phase delay is called iToF (Indirect-TOF, indirect time of flight) technology. For iToF technology, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N17/00H04N5/225
CPCH04N17/002H04N23/56H04N23/54H04N23/50
Inventor 张雅琴师少光黄源浩肖振中
Owner SHENZHEN ORBBEC CO LTD
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