Switching method and device for day and night ICR

A dual filter and switcher technology, applied in the field of image processing, can solve the problem of inaccurate switching between day and night dual filter switchers

Active Publication Date: 2016-12-14
ZHEJIANG DAHUA TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] In summary, the deficiency of the prior art is that the day and

Method used

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  • Switching method and device for day and night ICR
  • Switching method and device for day and night ICR
  • Switching method and device for day and night ICR

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Embodiment Construction

[0117] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0118] figure 1 A schematic diagram of the implementation process for the day and night double filter switcher switching method, as shown in the figure, may include the following steps:

[0119] Step 101. In night mode, determine the first distance, the first distance is the distance between the image illuminated by only visible light and the image illuminated by infrared light in the R / G and B / G color spaces;

[0120] Step 102, determine the second distance and the G value, the second distance is the distance between the image when the mixed light is irradiated and the image when only the infrared light is irradiated in the R / G and B / G color space, the G value is the G value of the image in the RGB space when the mixed light is irradiated;

[0121] Step 103, determining the shutter time and gain of the camera;

[0122] Step 104. Determine the bright...

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Abstract

The invention discloses a switching method and device for a day and night ICR. The method comprises the steps of determining first distance in a night mode, wherein the first distance is the distance between the image when only irradiation of visible light exists and the image when only irradiation of infrared light exists in R/G and B/G color space; determining second distance and a G value, wherein the second distance is the distance between the image when mixed light irradiation exists and the image when only the irradiation of the infrared light exists in the R/G and B/G color space, and the G value is the G value of the image in RGB space when the mixed light irradiation occurs; determining the shutter time and gain of a camera; determining a brightness value of external environment visible light according to the first distance, the second distance, the G value, the shutter time and the gain; determining a first threshold for switching from the night mode to a day mode; and switching the camera from the night mode to the day mode when the times that the brightness value of the external environment visible light is continuously greater than the first threshold is greater than a preset count threshold. Through adoption of the scheme, the switching accuracy of the day and night ICR of the camera can be improved.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a day and night ICR (dual filter switcher) switching method and device. Background technique [0002] With the development and progress of science and technology, many scenarios now require round-the-clock monitoring. During the day, the light is sufficient and the brightness is sufficient. At the same time, it is necessary to ensure that the color of the image is as accurate as possible. However, general image sensors can sense near-infrared components, resulting in color distortion. Therefore, it is necessary to use filters to filter out infrared components. If the ambient illumination is insufficient at night, a fully transparent filter is required to allow the image sensor to receive as much light as possible to ensure sufficient brightness of the image; or add an infrared lamp to increase the brightness of the image without causing light interference to the environm...

Claims

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Application Information

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IPC IPC(8): H04N5/232G03B17/14H04N5/225
CPCG03B17/14H04N23/60H04N23/55H04N23/667G03B7/091G03B7/14G03B7/0997H04N9/64H04N23/71H04N23/11H04N23/12H04N23/75
Inventor 王廷鸟
Owner ZHEJIANG DAHUA TECH CO LTD
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