Infrared Stereo Depth Calculation for Textureless Scenes
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Solution Overview
Problem
The quality of depth calculation in stereo image processing systems is unstable due to varying light sources and is poor in textureless scenes, affecting the accuracy of applications like hand motion detection and tracking, space scanning, and augmented reality.
Innovation Solution
The system employs a configuration of infrared cameras and an image processing circuit to calculate depth data, combined with stereo and color matching techniques, which improves depth quality and reduces the burden on central processing units by performing calculations at the front-end.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visible light cameras are used for depth calculation, then the system can capture color information, but the depth quality becomes unstable due to varying light sources and is poor in textureless scenes
Solution Approach 1:
The patent changes the wavelength parameter of light from visible spectrum to infrared spectrum. By using infrared cameras instead of visible light cameras, the system captures infrared images that are not affected by visible light sources, thereby stabilizing depth calculation quality and improving measurement precision in various lighting conditions and textureless scenes.
Solution Approach 2:
The patent introduces infrared radiation as an intermediary medium for depth calculation. By using infrared images as an intermediary between the scene and the depth calculation process, the system avoids direct dependence on varying visible light sources, thus improving reliability and stability of depth quality.
2Measurement precision
If multiple cameras and processing circuits are added to improve depth quality, then depth calculation accuracy improves, but the device complexity increases
Solution Approach 1:
The patent makes the infrared camera system multi-functional by using the same infrared imaging setup for both color matching and depth calculation. The infrared images serve dual purposes: generating greyscale matching images for depth calculation and providing thermal/color information, thereby reducing the need for separate dedicated depth sensors and lowering overall device complexity.
Solution Approach 2:
The patent merges the depth calculation function with the infrared imaging function. By combining depth calculation with the infrared camera system that is already capturing thermal and color information, the system achieves improved depth accuracy without adding separate complex depth sensing subsystems, thus managing device complexity effectively.
Data Source
AI summary
An interactive image processing system including a first infrared camera, a second infrared camera, an image processing circuit, a vision processing unit, an image signal processor, a central processing unit, and a memory device is disclosed. The present disclosure calculates depth data according to infrared images generated by the first and second infrared cameras to improve depth quality.