Image noise reducing device based on optics dolby

An image noise reduction and optical image technology, applied in image communication, color TV parts, TV system parts, etc., can solve the problems of poor image contrast, difficult image recognition and analysis, etc., to improve the signal-to-noise ratio, Avoid complexity, achieve the effect of display effect

Active Publication Date: 2014-05-07
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to overcome the problem that when the existing CCD or other photodetector arrays record optical images in a complex environment, the optical signal undergoes interference from scattering media or background light, resulting in the output image being close to the background signal intensity. After the gain, the noise in the gain process is introduced, and the contrast of the image further deteriorates, resulting in the gray value being close to or even identical after the analog-to-digital conversion, which makes subsequent image recognition and analysis difficult, such as Figure 1-2 As shown, in order to solve this difficulty, the problem of real-time and effective subtraction of background noise signals under different environments must be aimed at, so as to obtain an optical image output with a high signal-to-noise ratio under the above-mentioned conditions. The present invention proposes an optical Dolby-based Image noise reduction device, and use the characteristics of optical comparison components to select transmission and electrical signal comparison components to select and record light intensity to realize real-time and continuously adjustable background intensity subtraction based on hardware. The imaging effect is as follows: Figure 1-3 shown

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  • Image noise reducing device based on optics dolby
  • Image noise reducing device based on optics dolby
  • Image noise reducing device based on optics dolby

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Embodiment

[0056] Embodiment: an image noise reduction device based on optical Dolby CCD passive detection.

[0057] refer to diagram 2-1 and image 3 , Make an image noise reduction device based on optical Dolby of the present invention, which is used to realize CCD passive detection and image noise reduction display under interference conditions.

[0058] The imaging system 100 utilizes a telephoto imaging lens group 101 with a focal length of 300 millimeters and a corresponding diaphragm 102 to image a target object 0 about 500 meters away in a haze environment based on natural light illumination, and image the image to the optical image detection system 100. On the surface of the photodetector array 301 (301 is a charge-coupled device (CCD) in this implementation) in the module 300, the photodetector array 301 is a CCD, a metal oxide semiconductor MOS structure, which converts an optical signal into a charge signal, and then passes through the described The electrical signal trans...

Embodiment 2

[0061] Embodiment 2: An image noise reduction device based on the active detection of ICCD by Optical Dolby.

[0062] refer to Figure 2-2 and Figure 4 , make an image noise reduction device based on optical Dolby of the present invention. On the basis of Embodiment 1, this embodiment adopts a laser light source for active illumination, which is used to realize active detection and image enhancement and Noise reduction display. And combined with the distance gating technology, while realizing the distance resolution of the image signal, it can eliminate the foreground and background interference, combined with the optical and electrical signal selection of Optical Dolby, it can effectively improve the imaging signal-to-noise ratio in complex environments.

[0063]In this embodiment, a 300mm imaging lens group 101 is used to actively detect and image a target 1000 meters away. Compared with Embodiment 1, an active detection sub-module is added, including a detection light so...

Embodiment 3

[0067] Embodiment 3: An image noise reduction device based on the active detection of EMCCD by Optical Dolby.

[0068] refer to Figure 2-2 and Figure 5 , to make an image noise reduction device based on optical Dolby of the present invention, which is used to realize image noise reduction display of biological sample signals under the condition of interference from scattering media.

[0069] In this embodiment, the active detection light source is a femtosecond-wide tuned laser source after frequency doubling, and the center wavelength is 400nm to study the sample fluorescence images generated by different excitation wavelengths. The imaging lens group 101 is a microscope combination, and the image magnification is 500 times. The optical image signal enters the light-sensitive photodetector array 301 through the aperture 102 and the mirror group 103, and the present embodiment adopts EMCCD. In order to save system cost, the photosensitive area of ​​EMCCD is small and the n...

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Abstract

The invention discloses an image noise reducing device based on optics dolby, which comprises an imaging module, an optics image record module, an image display module and an electricity reference signal generating module, wherein the imaging module is used for carrying out optics imaging for target object. The light of the target object can reach to the photoelectric sensor array surface of the optical image record module after passing through certain disturbing medium such as fog and haze, the receiving of light signal and the photoelectric conversion can be finished; before the analog-to-digital conversion of electricity signal, the strength threshold value of signal recorded by the optics image record module can be changed by utilizing the regulation of the electricity reference signal generating module, and then the strength distinguish and selective record for signal from the photoelectric conversion can be carried out; and at last, the image can be output through the image display module. According to the image noise reducing device based on the signal selecting ability of hardware, the image noise reducing display under a complicated environment can be realized, the tension for processing subsequent image is relieved, the quick positioning and the feature recognition of the target object are facilitated.

Description

technical field [0001] The present invention relates to an image denoising device, in particular to an image denoising device based on optical Dolby, which is used to realize imaging in complex environments (such as transmission media such as fog and haze). Background technique [0002] In order to meet the needs of long-distance detection and remote sensing, it is urgent to overcome the increase of image noise and the decrease of contrast caused by the existing CCD or other photoelectric image detectors in complex environments, such as mist, haze, biological samples and other scattering media. , or an image noise reduction device for applications such as background interference when the sun angle is small. [0003] In most practical applications, the target and the background have different reflectivity (reflectivity and spatial distribution) for active / passive irradiation, which can be detected / imaging by conventional active / passive imaging, but for complex environments, s...

Claims

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Application Information

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IPC IPC(8): H04N5/357H04N5/213
Inventor许祖彦杨晶张景园杜仕峰崔大复彭钦军
OwnerTECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI