Dynamic Illumination Control for Stereo Matching Power
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Solution Overview
Problem
Active illumination for stereo matching in depth estimation increases power consumption, as it is not always necessary and can be wasteful in environments with sufficient natural texture or bright ambient light.
Innovation Solution
A controller is used to dynamically adjust the power of a projector set, turning on/off or ramping up/down projection elements based on the quality of stereo matching, ensuring sufficient texture is provided while minimizing power usage by coordinating illumination with image capture and analyzing natural texture in the scene.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If active illumination is used for stereo matching, then depth estimation accuracy is improved, but power consumption increases
Solution Approach 1:
The illumination system dynamically adjusts its operation based on real-time analysis of scene texture and ambient light conditions. The controller evaluates whether active illumination is necessary by analyzing natural texture in the scene and ambient light levels, then adapts the illumination state accordingly - turning on when needed for accurate depth estimation and turning off when natural texture suffices, thus resolving the contradiction between measurement precision and energy consumption
Solution Approach 2:
The system changes the operational parameters of the illumination system based on environmental conditions. By monitoring ambient light levels and scene texture characteristics, the controller adjusts the illumination intensity and duration parameters to provide sufficient texture only when necessary for accurate stereo matching, reducing overall power consumption while maintaining measurement accuracy when required
2Measurement precision
If active illumination is used continuously, then stereo matching quality is maintained, but energy waste increases
Solution Approach 1:
Instead of continuous operation, the illumination system uses periodic action by activating only during specific periods when depth estimation is required and natural texture is insufficient. The controller periodically evaluates scene conditions and activates illumination only when necessary, maintaining stereo matching quality when needed while avoiding continuous energy waste
Solution Approach 2:
The system implements feedback by continuously monitoring the quality of stereo matching and analyzing scene texture characteristics. Based on this feedback, the controller determines whether active illumination is necessary, adjusting the illumination state to maintain stereo matching quality only when natural texture is insufficient, thereby preventing energy waste during periods when illumination is not needed
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces power consumption while maintaining accurate depth estimation by only using active illumination when necessary, optimizing power usage without sacrificing stereo matching quality.
Implementation Method 1
a projector set (comprising one or more projection elements) that projects a light pattern towards a scene
Data Source
AI summary
The subject disclosure is directed towards controlling the intensity of illumination of a scene or part of a scene, including to conserve illumination power. Quality of depth data in stereo images may be measured with different illumination states; environmental conditions, such as ambient light, natural texture may affect the quality. The illumination intensity may be controllably varied to obtain sufficient quality while conserving power. The control may be directed to one or more regions of interest corresponding to an entire scene or part of a scene.