Camera Posture Detection via Ground Horizon Analysis
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Solution Overview
Problem
Existing surveillance systems face challenges in accurately detecting the posture of surveillance cameras, particularly PTZ cameras, which is crucial for analyzing moving objects and understanding camera positions and angles, as current methods lack efficient image-based analysis techniques.
Innovation Solution
A method and apparatus that acquire images from cameras, extract ground information, including horizon position, by detecting objects and feature points, and determine camera posture based on intersection analysis, allowing for automatic detection of camera modes (top-view or side-view) without manual input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS receivers are used to detect camera posture, then position information can be obtained, but the system complexity increases and requires additional hardware
Solution Approach 1:
The patent replaces the mechanical/GPS-based position detection system with an image processing system. By capturing images with the camera itself and analyzing ground information (horizon position, vanishing points) within those images, the system determines camera posture without requiring external GPS receivers or additional mechanical sensors.
Solution Approach 2:
The camera system uses its own imaging capability to detect its own posture. The camera captures images, and the image processing unit analyzes ground information within those same images to determine the camera's position and orientation, making the system self-sufficient without external辅助设备.
2Measurement precision
If manual input is required for camera posture detection, then accuracy can be maintained, but operation efficiency decreases
Solution Approach 1:
The system automatically captures images and processes ground information without requiring manual input. The image processing unit autonomously detects horizon positions, calculates vanishing points, and determines camera posture, eliminating the need for manual operation while maintaining detection accuracy.
Solution Approach 2:
The patent replaces manual posture input with an automated image processing system that extracts ground information from captured images and calculates camera posture automatically through computational geometry methods.
3Device complexity
If traditional methods are used for camera posture detection, then system simplicity is maintained, but detection accuracy and automation are insufficient
Solution Approach 1:
The camera system performs multiple functions: it captures surveillance images and simultaneously uses those same images for posture detection. The image processing unit serves dual purposes by both analyzing surveillance content and extracting ground information for orientation determination, increasing automation without adding separate dedicated hardware.
Data Source
AI summary
Provided is a method and apparatus of detecting a posture of a camera such as a surveillance or monitoring camera. The method includes acquiring an image captured by the camera, acquiring ground information about the ground in the image based on the image, and detecting the posture of the camera based on the ground information.