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1. CA3079552 - METHOD FOR RESTORING UNDERGROUND IMAGE ON BASIS OF RAY REVERSE TRACING TECHNOLOGY

Office
Canada
Application Number 3079552
Application Date
Publication Number 3079552
Publication Date 04.07.2020
Grant Number
Grant Date 16.03.2021
Publication Kind C
IPC
G06T 15/06
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
153D  image rendering
06Ray-tracing
H04N 5/359
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
359applied to excess charges produced by the exposure, e.g. smear, blooming, ghost image, crosstalk or leakage between pixels
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
XUZHOU GOLDFLUID HYDRAULIC TECHNOLOGY DEVELOPMENT CO., LTD.
Title
(EN) METHOD FOR RESTORING UNDERGROUND IMAGE ON BASIS OF RAY REVERSE TRACING TECHNOLOGY
(FR) METHODE POUR RESTAURER UNE IMAGE ILLEGALE AU MOYEN DE LA TECHNOLOGIE PARTRACAGE DE RAYONS INVERSES
Abstract
(EN)

A method for restoring an underground image based on a ray reverse tracing
technology is
disclosed. The method comprises: setting an underground camera as a light
source emitting point,
and emitting rays into an underground scene; recording all intersection points
of all rays and
underground objects, and calculating one intersection point closest to a view
point in the
intersection points; calculating a direction of rays newly generated after
they are reflected and
refracted by the objects in a position of the intersection point; respectively
tracing the rays newly
generated; recording rays irradiated onto a view plane after a strong light
source emitted from the
camera's position is reflected or refracted, and calculating the rays' light
intensity; converting the
light intensity into a pixel value; and eliminating the pixel value of strong
light emitted from the
camera to obtain the underground image.