System and method for measuring frame delay time of photographing system of optical measurement device

Abstract

The invention discloses a system and a method for measuring frame delay time of a photographing system of an optical measurement device. The system comprises an image recording apparatus (1), a photographing system (2), a timing terminal (3), a control and display LED (Light-Emitting Diode) lamp array apparatus (4) and an LED lamp array (5). The method comprises the following steps of: judging the number of image outputting delay frames of a video camera, according to the time information on a digital image output by the photographing system and the information of the LED lamp array; providing time and external interruption signals by the timing terminal; recording the image of the photographing system and superposing the time information of the recording moment by the image recording apparatus; controlling an LED array to turn on or turn off the LED lamps by the control and display LED lamp array apparatus according to the external interruption signal and the time information; and imaging the LED array by the photographing system. The system and the method provided by the invention realize accurate calibration on image outputting delay time of the photographing system.

Description

Technical field [0001] The invention relates to the calibration of high-precision optical measuring equipment, and the fields of photogrammetry and the like. Background technique [0002] Optical measuring equipment is a non-contact measuring equipment, which images the target, and then obtains the target's position, posture and other information by processing the image. Due to the accuracy of optical measurement equipment, optical measurement equipment has been widely used in various fields of civil and military use. In optical measurement equipment, the camera system is an important device, which consists of a camera, a lens and other auxiliary circuit devices. In the production process of optical measurement equipment, in order to clearly understand the accuracy of the equipment, the camera system is generally calibrated. The purpose of calibration is to determine the optical center, optical axis, focal length, and other physical parameters of the camera system, but these pa...

AI Technical Summary

Problems solved by technology

To sum up, these factors make the image output by the camera after the exposure is not the image of the current frame, generally delayed by 0~3 frames; for some complex camera systems, this delay may be 10 frames or even more Big

Latency cannot be calibrated by static conditions

At the same time, because the delay of image output is related to the settings of the camera system, if the frame rate of the camera changes, the delay of the camera will also change.

Delay has no effect on the measurement of static targets by optical measurement equipment, but it will cause large errors in the measurement of dynamic targets

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