Staggered Depth Camera Triggering for Gesture Recognition
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Solution Overview
Problem
In gesture recognition systems using multiple cameras, interference between cameras leads to decreased acquisition accuracy due to simultaneous operation, resulting in blind spots and reduced effectiveness in capturing user gestures.
Innovation Solution
A gesture recognition apparatus comprising a gesture processor and multiple depth cameras, where each camera has a controller that generates and transmits acquisition signals at different times, utilizing optical triggers, current-voltage converters, filter shapers, and phase compensators to minimize interference and improve image acquisition accuracy, and includes light-emitting elements for depth information calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple cameras are used to acquire gestures, then the acquisition range is improved, but camera interference occurs and measurement precision deteriorates
Solution Approach 1:
The patent implements periodic action by controlling multiple cameras to operate in alternating time intervals rather than simultaneously. Each camera is activated in sequence with specific time windows, creating a periodic acquisition pattern that eliminates mutual interference while maintaining comprehensive coverage through the coordinated timing of multiple sensing cycles.
2Productivity
If multiple cameras operate simultaneously, then productivity is improved, but harmful factors increase due to camera interference
Solution Approach 1:
The patent applies segmentation by dividing the gesture acquisition process into distinct time segments, with each camera assigned to specific time intervals. This temporal segmentation separates the operations of multiple cameras so they do not interfere with each other, while the overall system maintains high productivity through the coordinated sequence of segmented acquisition cycles.
3Object-generated harmful factors
If cameras are staggered in time, then harmful factors are reduced, but loss of time increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring optimized time intervals and coordination patterns for camera operation. The staggered timing is carefully predetermined to minimize total acquisition duration while eliminating interference, allowing the system to achieve both reduced harmful factors and acceptable time loss through advance planning of the acquisition sequence.
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
The solution enhances gesture acquisition accuracy by preventing camera interference, expanding the acquisition range, and reducing blind spots, while allowing for correct gesture recognition through synchronized and staggered image capture processes.
Implementation Method 1
The optical trigger may include a photoelectric converter. The at least one of the plurality of depth cameras having the optical trigger may further include a current-voltage converter. The current-voltage converter may be configured to convert a current signal from the photoelectric converter into a voltage signal
Implementation Method 2
Each of the plurality of depth cameras may further include a light-emitting element. The light-emitting element may be electrically coupled to the light control element, and the light-emitting element may be configured to emit a light signal in response to the light-emitting signal. The light signal may be reflected by an object to be imaged to produce a reflected light signal
Implementation Method 3
The phase compensator may be configured to compensate a phase of the voltage signal from the filter shaper to obtain a compensated voltage signal and output the compensated voltage signal to the controller
Data Source
AI summary
The present disclosure relates to a gesture recognition apparatus. The gesture recognition apparatus may include a gesture processor and a plurality of depth cameras connecting to the gesture processor. Each of the plurality of the depth cameras may include a controller and a collector. The controller may be configured to generate and transmit an acquisition signal to the collector in response to a trigger signal. The collector may be configured to receive the acquisition signal and perform an image acquisition process in response to the acquisition signal.