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Halo simulation method in low-light level television imaging

A simulation method and low-light technology, applied in the field of halo simulation, can solve the problems of low image accuracy and small application range of light sources, and achieve the effect of expanding the application range

Inactive Publication Date: 2014-02-26
XIDIAN UNIV
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Problems solved by technology

In these literatures, there is no further research on the accurate quantitative characterization of the halo in the output image of the system, which leads to the problems of low accuracy of the output image of the low-light TV imaging simulation and a small range of application of the light source

Method used

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  • Halo simulation method in low-light level television imaging
  • Halo simulation method in low-light level television imaging
  • Halo simulation method in low-light level television imaging

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Embodiment Construction

[0018] refer to figure 1 , the detailed implementation process of the halo simulation method in the low-light television imaging of the present invention is as follows:

[0019] Step 1. Generate low-light 3D scene.

[0020] Input the calibration parameters of the strong light source and optical lens, photocathode, electronic lens, microchannel plate, fluorescent screen which constitute the low-light TV imaging device, use 3Dmax software to generate a three-dimensional model of the strong light source and low-light TV imaging device, and convert the three-dimensional model Import it into an OGRE-based 3D scene simulation program to generate a low-light 3D scene.

[0021] Step 2. Calculate the brightness of the optical lens surface.

[0022] (2a) According to the luminance L of the strong light source, calculate the illuminance E of the strong light source at the surface element of the optical lens according to the photometric formula i (i,j)

[0023] E ...

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Abstract

The invention discloses a halo simulation method in low-light level television imaging and mainly aims at solving the problems that a traditional testing researching method is high in cost and low in efficiency. The method comprises the realizing steps of guiding in a strong-light source and a three-dimensional model of a low-light level television imaging component on a three-dimension scene simulation platform based on an OGRE so as to generate a three-dimension low-light level scene, counting the electronic magnitude reaching a fluorescent screen according to the low-light level television system internal electron motion laws, the photoelectric conversion principle and the micro-passage plate scattering theory in the three-dimension low-light level scene, and realizing simulation of halo grey level distribution through the system voltage signal conversion principle and the grey level quantitative principle on the basis of the electron amount reaching the fluorescent screen. The halo simulation method is high in precision, wide in adapting range, high in real-timeliness, and capable of realizing accurate simulation of the strong light source in the low-light level television system.

Description

technical field [0001] The invention belongs to the technical field of computer simulation, and in particular relates to a halo simulation method in low-light television imaging, which can be used in the field of object recognition in low-light scenes under strong light sources. Background technique [0002] When strong light sources, such as street lights, car lights, flares, etc., appear in the field of view of the low-light TV system, a halo will form around the light point on the output image of the system. The local strong light on the halo will cover up the surrounding weak signals, directly affecting the imaging resolution and signal-to-noise ratio of the system; and under the same observation conditions with the same factors such as the size of the light source and the observation distance, the output images of different types of imaging systems will be glazing. Halos vary in size. Therefore, research on the quantitative characterization of halo and its simulation m...

Claims

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Application Information

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IPC IPC(8): G06T15/50G06T17/00
Inventor 王晓蕊张青文郭冰涛冯海霞黄曦刘德连荆卫国王小兵张建奇
Owner XIDIAN UNIV
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