Electronic black card device for video recording equipment and imaging method thereof

Abstract

Provided is an electronic black card device for video recording equipment. The video recording equipment comprises a photosensitive element and an imaging processor which are connected with each other. The device comprises a monochromatic reversed electronic screen and a single-phase reversed processor used for controlling on-off of the monochromatic reversed electronic screen. The monochromatic reversed electronic screen is stacked in front of the photosensitive element. The single-phase reversed processor is connected with the photosensitive element and the monochromatic reversed electronic screen. The imaging method comprises the following steps: firstly, initial imaging is carried out; secondly, initial imaging data is acquired and analyzed; thirdly, the monochromatic reversed electronic screen blocks an optical path and synchronously reverses secondary imaging; fourthly, secondary imaging data is revised; and fifthly, an output picture is imaged. According to the invention, the optical path is blocked from entering an over-exposed area of the photosensitive element, so that exposure of less-exposed and over-exposed areas of the whole imaged picture can be controlled accurately, and the video recording equipment can obtain an image of truly consistent exposure. The monochromatic reversed electronic screen can be used as a mechanical shutter to make the power consumption of the video recording equipment lower, and is more suitable for image shutters with high anti-shake requirement.

Description

technical field [0001] The invention relates to an electronic black card device for video recording equipment and an imaging method thereof. Background technique [0002] Chinese Patent Document No. CN101651785B announced an imaging device on November 21, 2012, which includes an image sensor and an electronic black card. The image sensor includes a photosensitive surface provided with a plurality of photosensitive units and a microprocessor. The microprocessor includes a brightness analysis module and a judgment module. The brightness analysis module analyzes the ambient brightness to obtain the optimal exposure time. The judging module judges whether the image has an overexposed area. The electronic black card is located on the side of the photosensitive surface of the image sensor, and includes a plurality of switch units corresponding to the photosensitive units and a control unit. The control unit is used to calculate the opening time of each switch unit, and control...

AI Technical Summary

Problems solved by technology

[0003] However, the black card of this device is located on the surface of multiple photosensitive units on one side of the photosensitive surface, and the steps of analyzing each unit and controlling each unit are relatively cumbersome. If the calculation is performed under the same sharp tool, the calculation speed will inevitably be affected , can’t adapt to the use of high-speed shutter, can’t support B door, and can’t support dynamic recording (that is, video), and the picture is too unnatural, there are more noises, and the research and development cost is also high

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