Image Output Synchronization for Multi-Framerate Cameras
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Solution Overview
Problem
Cameras installed on robots or self-driving cars often have different frame rates, leading to desynchronization of image outputs, which complicates simultaneous localization and mapping (SLAM) processes.
Innovation Solution
An image output synchronization method and device that utilizes a programmable logic circuit connected to an oscillator to configure count values based on designated frame rates and oscillator frequencies, generating synchronization signals to synchronize camera outputs across different frame rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cameras operate at different frame rates, then each camera can capture images at its optimal rate, but the image outputs become desynchronized with large time differences and phase differences
Solution Approach 1:
The patent introduces a synchronization signal as an intermediary between cameras with different frame rates. This synchronization signal coordinates the frame control signals of multiple cameras, allowing them to operate at different native frame rates while maintaining synchronized output timing. The synchronization signal acts as a mediator that resolves the timing conflicts between cameras with disparate frame rates.
Solution Approach 2:
The patent implements dynamic frame control by allowing each camera to operate at its optimal frame rate while using a common synchronization signal to coordinate outputs. The system dynamically adjusts frame control signals based on the synchronization signal, enabling flexible frame rate configuration for each camera without compromising overall synchronization. This dynamic approach allows the system to adapt to different camera capabilities while maintaining reliable synchronized operation.
2Reliability
If a synchronization signal is introduced to coordinate camera outputs, then image output synchronization is achieved, but system complexity increases due to additional control circuitry
Solution Approach 1:
The synchronization signal serves multiple functions simultaneously: it coordinates frame timing across different cameras, maintains synchronization without requiring complex point-to-point control circuits between cameras, and allows each camera to operate independently at its optimal frame rate. This multi-functional approach reduces overall system complexity compared to implementing dedicated control circuits for each camera pair.
3Productivity
If frame control signals are adjusted to achieve synchronization, then output frame rates can be maintained close to designated values, but the control mechanism becomes more complex
Solution Approach 1:
The system uses the synchronization signal as a feedback mechanism to maintain frame rate accuracy. Each camera's frame control signal is adjusted based on the synchronization signal timing, ensuring that output frame rates remain close to designated values. This feedback-based control is simpler than implementing complex predictive algorithms or manual calibration procedures for each camera.
Data Source
AI summary
An image output synchronization method, performed by a programmable logic circuit connected to an oscillator, includes: configuring a count value according to a designated frame rate and a frequency of the oscillator generating a count signal by each one of a plurality of frame controllers; generating a synchronization signal periodically and outputting the synchronization signal to the frame controllers by a clock generator; and performing a synchronization procedure on a camera by each one of the frame controllers when triggered by the synchronization signal every time, with the synchronization procedure including: triggered by the count signal of the oscillator to control a frame control signal outputted to the camera according to the count value and a width of the count signal.