3D structured light depth camera and mobile terminal

Abstract

The invention discloses a 3D structured light depth camera and a mobile terminal, and relates to the field of 3D depth measurement. The 3D structured light depth camera provided by the invention comprises: an emitting module which is used for projecting the coded structured light to a scene for illumination, a receiving module which is used for shooting spot images of a scene illuminated by structured light at a certain focal length and transmitting the spot images to the data processor unit, and a data processor unit which is used for carrying out overall cooperative control and data calculation on all optical modules of the depth camera.The data processor unit is specifically used for calculating the depth value of the image data shot by the receiving module, controlling the receiving module to adjust the focal length according to the change of the depth value, circularly acquiring the image data shot by the receiving module after focusing, and calculating the depth value until a depth image with an improved error is obtained.

Description

technical field [0001] The invention relates to the field of 3D depth measurement, in particular to an improved 3D structured light depth camera and a mobile terminal capable of suppressing depth measurement errors of 3D structured light. Background technique [0002] The 3D depth measurement technology can collect the depth coordinate information of the scene target, providing additional data processing freedom for back-end development. With the popularization of mobile terminal devices and intelligent interactive devices, 3D depth measurement technology has increasingly become the core technology of the new generation of human-computer interaction, and has a wide range of applications in industrial inspection, security retail, somatosensory games, mobile payment and biomedicine. Application prospects. [0003] Depth cameras based on speckle structured light technology are currently a widely used 3D depth measurement solution. It uses coded random, pseudo-random or regula...

AI Technical Summary

Problems solved by technology

The 3D depth camera based on structured light illumination is limited by the technical principle, and its depth measurement accuracy deteriorates with the increase of the scene distance.

This affects the confidence and validity of camera measurement data, which severely restricts the performance of 3D structured light measurement technology in various applications

Although the measurement error problem can be improved to a certain extent by adjusting the baseline distance between the structured light transmitter and receiver, the redundancy of baseline adjustment is small, and the ability to improve the error is extremely limited, and high precision corresponds to a wide baseline. Destroy the compactness of the depth camera, which is not conducive to miniaturization

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