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Measurement apparatus and method of camera shutter delay time

A technology of delay time and camera shutter, applied in the field of photography, can solve the problems such as the lack of equipment, and achieve the effect of being suitable for popularization, easy to implement and high efficiency

Active Publication Date: 2015-08-05
WUHAN UNIV
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  • Measurement apparatus and method of camera shutter delay time
  • Measurement apparatus and method of camera shutter delay time

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[0024] The technical solution of the present invention will be described in detail below with reference to the drawings and embodiments.

[0025] See figure 1 The device provided by the embodiment of the present invention includes a single-chip microcomputer (MCU), an LED display and a shutter control line. There are multiple GPIO pins on the microcontroller chip, namely general input-output pins GPIO0~12, and INT pins, namely external interrupt pins.

[0026] The single-chip microcomputer is connected to the LED display through GPIO pins GPIO0~11, and an appropriate current-limiting resistance can be set in the middle during specific implementation.

[0027] The single-chip microcomputer is connected with the shutter control line of the camera through the GPIO pin GPIO12. Before measuring, adjust the viewfinder of the camera so that the LED display can be clearly seen, that is, the LED display needs to be placed within the viewfinder range of the camera. In specific implementation...

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Abstract

Provided in the invention is a measurement apparatus and method of camera shutter delay time. A single-chip microcomputer, a display, and a camera shutter control line are arranged. The single-chip microcomputer I connected with the display and the camera shutter control line; and the display is arranged in a viewfinder range of the camera. The single-chip microcomputer executes the following flow: step one, starting a counter and outputting and displaying an accumulated result of the counter to the display; step two, carrying out delaying to wait for preparation of the camera; and step three, determining whether a preset number of times for measurement is reached; if so, finishing the work; and if not, resetting the counter and sending an exposure instruction to the camera by the shutter control line, thereby enabling the camera to shoot the display to obtain current shutter delay time of the camera; and returning to the step two until reaching the number of times for measurement. On the basis of the technical scheme, the delay time parameter of the camera shutter can be measured rapidly and accurately, thereby guaranteeing accuracy of subsequent image data processing.

Description

technical field [0001] The invention belongs to the field of photography, in particular to a camera shutter delay time measurement device and method for aerial photogrammetry or traditional photogrammetry. Background technique [0002] Camera shutter delay (sometimes also called shutter lag, shutter time lag) is an important parameter of the camera. This parameter reflects the processing speed of the camera after the shutter is pressed and the photo is taken. In general applications, this parameter affects the capture speed, especially in sports photography, if the shutter delay time is long, the shooting opportunity will be missed. In photogrammetry engineering, especially in recent years, the field of aerial photogrammetry has developed rapidly (especially unmanned aerial vehicles, including rotorcraft or fixed-wing aircraft hanging on photography equipment), the importance of camera shutter delay parameters is highlighted. Because in aerial photogrammetry, for later data...

Claims

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Application Information

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IPC IPC(8): G03B43/02
Inventor 张涛
Owner WUHAN UNIV
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