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1. CN109862209 - A method for restoring an underground image based on a light reverse tracking technology

Office
China
Application Number 201910006766.3
Application Date 04.01.2019
Publication Number 109862209
Publication Date 07.06.2019
Grant Number 109862209
Grant Date 26.02.2021
Publication Kind B
IPC
H04N 5/217
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
14Picture signal circuitry for video frequency region
21Circuitry for suppressing or minimising disturbance, e.g. moire or halo
217in picture signal generation
H04N 5/357
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
30Transforming light or analogous information into electric information
335using solid-state image sensors
357Noise processing, e.g. detecting, correcting, reducing or removing noise
H04N 7/18
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
7Television systems
18Closed-circuit television systems, i.e. systems in which the signal is not broadcast
CPC
H04N 5/217
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
14Picture signal circuitry for video frequency region
21Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
217in picture signal generation ; in cameras comprising an electronic image sensor, e.g. in digital cameras, TV cameras, video cameras, camcorders, webcams, or to be embedded in other devices, e.g. in mobile phones, computers or vehicles
H04N 5/357
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
30Transforming light or analogous information into electric information
335using solid-state image sensors [SSIS]
357Noise processing, e.g. detecting, correcting, reducing or removing noise
H04N 7/18
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
7Television systems
18Closed circuit television systems, i.e. systems in which the signal is not broadcast
Applicants CHINA UNIVERSITY OF MINING AND TECHNOLOGY
中国矿业大学
Inventors WU YUE
吴越
WANG ZHONGBIN
王忠宾
TAN CHAO
谭超
LIU PENG
刘朋
ZHOU HONGYA
周红亚
LIU BOWEN
刘博文
WU HONGLIN
吴虹霖
LI XIAOYU
李小玉
GE YIPENG
葛逸鹏
CHEN KAIKAI
陈凯凯
Agents 南京经纬专利商标代理有限公司 32200
Title
(EN) A method for restoring an underground image based on a light reverse tracking technology
(ZH) 一种基于光线逆追踪技术还原井下图像的方法
Abstract
(EN)
The invention discloses a method for restoring an underground image based on a light reverse tracking technology, which comprises the following steps of: setting an underground camera as a light source emission point, and emitting light to an underground scene; Recording all intersection points of all light rays and the underground object, and calculating an intersection point closest to the viewpoint in the intersection points; Calculating the direction of newly generated light after the light is reflected and refracted by the object at the intersection point; Tracking the newly generated light rays respectively; Recording light rays which are emitted by the camera and irradiate the visual plane after being reflected or refracted by a strong light source for three times, and calculating the light intensity of the light rays; converting The light intensity into a pixel value through a CCD photosensitive element of the camera; And in the image finally presented on the visual plane, eliminating the pixel value of strong light emitted by the camera, and obtaining the image with the influence of the strong light source eliminated. According to the invention, the interference of a strong light source can be effectively eliminated, an underground image is restored, and the smooth underground work and the life safety of an operator are ensured.

(ZH)
本发明公开了一种基于光线逆追踪技术还原井下图像的方法,包括以下步骤:设井下摄像仪为光源发射点,向井下场景中发射光线;记录所有光线与井下物体的所有交点,计算交点中距离视点最近的一个交点;计算光线在交点处被物体反射和折射后新产生光线的方向;对上述新产生的光线分别进行跟踪;记录摄像仪处发出的强光源反射或折射三次后照射到视平面上的光线,计算该光线的光强;通过摄像仪CCD感光元件将光强转化为像素值;在最终呈现在视平面上的图像中,消除摄像仪发出的强光的像素值,得到消除强光源影响后的图像。本发明能够有效的消除强光源的干扰,还原井下图像,确保井下工作的顺利进行和操作人员的生命安全。