Projection method based on automatic exposure control and automatic switching projection pattern

An automatic switching and projection pattern technology, applied in the field of image exposure, can solve the problems of difficult to maintain stable high-quality imaging, large difference between image brightness and target brightness, insufficient exposure of the target area, etc., to achieve fast and stable automatic exposure control, Stabilize high-quality imaging, achieve the effect of iteration speed and search accuracy

Active Publication Date: 2019-04-16
深慧视(深圳)科技有限公司
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  • Application Information

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Problems solved by technology

[0006] In order to solve the above-mentioned problems in the prior art, the purpose of the present invention is to provide a projection method based on automatic exposure control and automatic switching of projection patterns, which is used to solve the problem of large noise signals and difficulty in

Method used

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  • Projection method based on automatic exposure control and automatic switching projection pattern
  • Projection method based on automatic exposure control and automatic switching projection pattern
  • Projection method based on automatic exposure control and automatic switching projection pattern

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Embodiment 1

[0055] Such as figure 1 As shown, a projection method based on automatic exposure control and automatic switching of projection patterns includes the following steps:

[0056] S1: According to the current exposure time and the current coding pattern, use binocular vision and active structured light source projection method to collect images, and perform three-dimensional imaging according to all the collected images;

[0057] Structured light is generally a specially coded light source, which can not only increase the texture information of the target, but also provide active lighting;

[0058] S2: Obtain the last image collected each time, use the dynamic partition and dynamic weight coefficient adjustment method to divide the image into a background area and a target area, and determine the weight coefficient of each area according to the comparison of the average brightness of the two areas, and get the average brightness of this image, as figure 2 shown, including the f...

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Abstract

The invention belongs to the technical field of image exposure, and relates to a projection method based on automatic exposure control and an automatic switching projection pattern. The method comprises the following steps: S1: performing image collection and performing three-dimensional imaging; S2: acquiring the last image of each collection, and acquiring average brightness of the image; S3: judging whether the average brightness of the image is within a target brightness range; S4: acquiring a difference value between the average brightness of the image and the target brightness, and performing exposure compensation; S5: performing three-dimensional imaging quality evaluation; S6: judging whether a coding pattern is switched; and S7: selecting a group of patterns with the highest evaluation of three-dimensional imaging quality for projection. By adoption of the projection method disclosed by the invention, the following problems in the prior art are solved: the noise signal is large, it is difficult to maintain stable high-quality imaging, when the contrast between a target object and the background is too large, a target area is underexposed or overexposed, the adjustment timeis too long, and the difference value between the image brightness and the target brightness is too large.

Description

technical field [0001] The invention belongs to the technical field of image exposure, and in particular relates to a projection method based on automatic exposure control and automatic switching of projection patterns. Background technique [0002] Automatic exposure control is to control the exposure when shooting, and the exposure refers to the amount of luminous flux from the scene to the camera. High-quality images can only be obtained when the photosensitive device is properly exposed. The amount of exposure is determined by the aperture size of the camera, the exposure time and the signal gain. The aperture is a device that uses its light hole to control the intensity of light that reaches the photosensitive chip of the camera during exposure; the shutter uses the length of its opening time to control the time of light entering, and then controls the amount of light entering. Adjusting the size of the aperture is generally done manually or by using an adjustable len...

Claims

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Application Information

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IPC IPC(8): H04N5/235
CPCH04N23/71H04N23/73H04N23/70
Inventor 吕聪奕郭会文杨山杉赖银萍程至强陈野安雨婷刘云辉
Owner 深慧视(深圳)科技有限公司
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