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Image collection control method and device, and vehicle chassis image obtaining system

專利號
US11176685B2
公開日期
2021-11-16
申請人
Hangzhou Hikrobot Technology Co., Ltd（CN Zhejiang）
發(fā)明人
Yuanji Chen; Pinjiang He; Wencong Zhang
IPC分類
G06T7/246; G06T7/80; G06T7/73; H04N5/225; H04N5/235
技術(shù)領(lǐng)域
capturing,image,module,scan,line,camera,vehicle,speed,object,chassis
地域： Zhejiang

摘要

Embodiments of a method and device for controlling image capturing and a system for acquiring an image of a chassis of a vehicle are provided, which relate to image capturing technology and can eliminate deformation of images occurred due to stretch or compression in image capturing. The system includes a speed measuring module, a control module, and a line scan camera. The speed measuring module measures the speed of the vehicle and transmits the measured speed of the vehicle to the control module. The control module determines line frequency for image capturing according to the speed of the vehicle, and controls the line scan camera to perform image capturing on the chassis of the vehicle with the line frequency.

說明書

determining the line frequency for image capturing according to the calculated number of pixels VP.

Optionally, the step of calculating the number of pixels VP that the object travels across per unit time on the imaging plane of the image capturing module includes:

determining relative positions of a feature point of the object both in the i-th image and in the (i+1)-th image captured by the image capturing module, wherein i is an integer and 1≤i<m, and m is the total number of the images captured by the image capturing module;

determining the number of pixels n between the determined two relative positions; and

calculating the number of pixels Vp that the object travels across per unit time on the imaging plane of the image capturing module according to the following formula:
Vp=n/t;

wherein t is a time interval between the capturing of the i-th image and the capturing of the (i+1)-th image by the image capturing module.

Optionally, the step of determining the line frequency for image capturing according to the calculated number of pixels VP includes:

determining the line frequency for image capturing Q according to the following formula when a linking line linking the image capturing module and the line scan camera is parallel to a direction of motion of the object:
Q=Vp*(p2/f2)*(f1/p1);

權(quán)利要求

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