Dynamic focusing method based on flight time and camera device thereof

Abstract

The invention provides a dynamic focusing method based on flight time. The method is suitable for an image pickup device with a ToF camera and an RGB camera with a zooming function. The dynamic focusing method based on flight time comprises the following steps: S1, obtaining depth information of a real-time three-dimensional scene through a ToF camera, and focusing a target object in the three-dimensional scene through an RGB camera to obtain an initial depth image; S2, extracting three-dimensional feature points of a target object in the initial depth image to confirm the target object, and taking the distance between the target object and the ToF camera as a setting basis of an initial focus of the RGB camera; and S3, enabling the ToF camera to acquire the distance change between the target object and the ToF camera, and control the RGB camera to perform focusing according to the distance change, so that the RGB camera is focused on the target object. According to the dynamic focusing method based on the flight time, the RGB camera is controlled to focus rapidly and accurately based on the depth information acquired by the ToF camera. The invention also provides a camera device with a dynamic focusing function based on flight time.

Description

technical field [0001] The invention provides a focusing method, in particular to a time-of-flight based dynamic focusing method and an imaging device thereof. Background technique [0002] With the continuous upgrading of digital equipment, especially the continuous upgrading of mobile phone cameras in recent years, dual-camera, multi-camera and other stereoscopic camera technologies and equipment are constantly updated, and the shooting effect is also continuously improved. However, for the shooting of moving objects, Especially when the shooting target is constantly moving in the scene, it is still a huge challenge for the existing mobile phone camera and computing system to achieve clear target capture. [0003] The patent document with the publication number CN 108200339 A discloses a target tracking and positioning method, system and camera device, and provides a target tracking and positioning method, system and camera device, involving the field of camera technology,...

AI Technical Summary

Problems solved by technology

[0004] In the technical solution disclosed in CN 108200339A, although the movement of the target can be detected by the algorithm and then the focus of the second camera can be adjusted, it is difficult to accurately track and confirm the moving target, which in turn affects the focus of the second camera

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