Dual-lens black light camera

A camera and dual-lens technology, applied in the field of video surveillance imaging, can solve the problems of low signal-to-noise ratio of grayscale images, high assembly precision requirements, and high manufacturing costs

Pending Publication Date: 2018-01-12
四川精视科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of low grayscale image signal-to-noise ratio, high assembly precision requirements, and high manufacturing cost of existing black light cameras, the present invention discloses a dual-lens black light camera

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Such as figure 2 As shown, a dual-lens black-light camera includes a camera housing (1), a photoelectric sensor (2), a near-infrared light source (3), a near-infrared multi-lens lens (4), a monochromatic image sensor (5), and a visible light lens (6), IRCUT (7), color image sensor (8), processing circuit (9), power supply interface (10), data interface (11). Among them, the power of the near-infrared light source (3) is 10W, and the wavelength is 808nm; the near-infrared lens increasing lens (4) and the visible light lens (6) are C-mount, the resolution is 2 million pixels, and the aperture F=1.2, suitable for the target surface The size is 1 / 1.8 inches, and the focal length is f=6mm; the monochrome image sensor adopts a 2-megapixel Mono CMOS star-level image sensor with a frame rate of 30fps, and the color image sensor adopts a 2-megapixel Bayer CMOS star-level image sensor with a frame rate of 30fps, monochrome image sensor and color image sensor chip area is 1 / 1.8 ...

Embodiment 2

[0106] The difference from Example 1 is that in the nighttime working mode, method b is used to fuse the grayscale image A and the color image B to obtain a high-quality nighttime color image C″, where f m (·) Image mean filter window size is 5, color space λ selects YUV color space, image edge-preserving multi-scale decomposition layers n=4, image edge-preserving smoothing filter f smooth (·) Choose weighted least squares to preserve edge smoothing.

Embodiment 3

[0108] The difference from Embodiment 2 is that the color space λ selects the Lab color space.

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PUM

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Abstract

The invention discloses a dual-lens black light camera, which belongs to the technical field of low-illumination color imaging, and is used for solving the problem of poor nighttime color image quality of an existing low-illumination camera. The dual-lens black light camera adopts near-infrared light-supplementing illumination in case of low illumination, adopts a near-infrared anti-reflection lens and a single-color image sensor for photographing a near-infrared+visible light grayscale image, adopts a visible light lens parallel to an optical axis of the near-infrared anti-reflection lens anda color image sensor for photographing a visible light color image, performs denoising on the color image by taking the grayscale image as a guide, and then performs image detail and color fusion onthe grayscale image and the color image in a color and brightness separation space so as to obtain a low-illumination color image. The dual-lens black light camera can effectively improve the low-illumination color imaging quality and reduce the manufacturing cost of the camera.

Description

technical field [0001] The invention belongs to the technical field of video surveillance and imaging, in particular to a dual-lens black light camera. Background technique [0002] Video surveillance technology is widely used in military, security, and public safety fields. Cameras can be used to observe and record events in areas of interest, which play a major role in preventing crime and ensuring public safety. The camera is the key core device for the application of video surveillance technology, and the image sensor inside the camera can image the scene. The image quality captured by the camera is closely related to the ambient light conditions. Bright, clear images can be captured when there is sufficient light. When the light is insufficient, such as at night, the brightness of the captured image is not enough, and there is a lot of image noise, so clear imaging cannot be achieved. For video surveillance, a 24-hour surveillance capability is required. Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/225H04N5/232H04N9/09H04N9/64
Inventor 不公告发明人
Owner 四川精视科技有限公司
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