Height Measurement Using Depth Image Ground Plane Detection
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Solution Overview
Problem
Conventional height measuring methods face challenges in accuracy due to difficulties in determining the position of feet, which can be obscured by objects or shaded, and require predetermined camera positions, limiting their convenience and applicability.
Innovation Solution
A height measuring system and method utilizing a depth image processing unit to analyze and determine the ground and top of a human body, calculating height without needing to separate feet, and incorporating a gravity sensor for ground detection, allowing for real-time measurement without fixed camera positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional height measuring methods use feet position determination, then measurement can be performed, but measurement accuracy deteriorates when feet are obscured or shaded
Solution Approach 1:
The patent extracts the feet detection requirement from the height measurement process. Instead of detecting feet position, the system directly detects the ground plane and calculates height as the vertical distance from the camera to the ground plane, eliminating the difficulty of feet position detection while maintaining measurement accuracy
Solution Approach 2:
The patent introduces the ground plane as an intermediary element. By detecting the ground plane equation through multiple point fitting and using it as a reference, the system indirectly obtains height information without directly detecting feet position, resolving the detection difficulty
2Adaptability or versatility
If camera position and angle are predetermined, then measurement accuracy can be maintained, but device adaptability and convenience deteriorate
Solution Approach 1:
The patent transforms the static camera positioning requirement into a dynamic adaptation capability. The system uses real-time ground plane detection and coordinate transformation to adapt to different camera positions and angles, allowing flexible placement while maintaining measurement accuracy through computational compensation
Solution Approach 2:
The patent changes the measurement parameters from fixed camera coordinates to dynamic ground plane coordinates. By detecting the ground plane equation and transforming coordinates based on camera position and angle, the system adapts to varying placement conditions while preserving measurement precision
Data Source
AI summary
Disclosed is a height measuring system and method. The height measuring system of the disclosure comprises an image obtaining unit configured to obtaining a depth image and a processing unit configured to analyze and determine a ground and a top of a head of a human body in the depth image and calculating a distance between the top of the head of the human body and a plane of the ground as a height.