Vehicle Indirect Viewing Frame Rate Conversion for Smooth Motion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicle camera systems face challenges in matching the refresh rate of image sensors with LCD panels, resulting in a less smooth image impression for drivers, particularly when trying to assess high relative speeds, due to the limitations of standard image sensors and LCD panels not aligning with the required 60 fps for mirror replacement systems according to UN/ECE-R46.
Innovation Solution
An indirect viewing system that temporarily stores images from the image sensor and processes them to adapt the refresh rate to 60 fps, using an image processing device to calculate new images from consecutively captured frames, allowing for the output of images at a higher refresh rate on an LCD panel, thereby providing a smooth motion sequence without the need for high-cost image sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a standard image sensor with refresh rate less than 60 fps is used, then cost is reduced, but image smoothness deteriorates
Solution Approach 1:
An image processing device is introduced as an intermediary between the image sensor and display device. This mediator performs frame rate conversion by generating intermediate frames through interpolation algorithms, transforming the low frame rate output from the image sensor into a high frame rate signal suitable for the display device, thereby resolving the mismatch without requiring expensive high-performance sensors
Solution Approach 2:
The system changes the temporal parameter (frame rate) of the image signal through computational processing. By applying frame rate conversion algorithms that generate additional intermediate frames, the system transforms the temporal characteristics of the image sequence from less than 60 fps to 60 fps, improving image smoothness while maintaining compatibility with standard sensors
Data Source
AI summary
An indirect viewing system for a vehicle has at least one image capture device (2) having an image sensor (3) for continuously taking images at a first frame rate, an image memory (4) that temporarily stores images for processing that is temporally after the images are captured, and an image processing device (6) adapted to continuously compute at least one new image from at least two successively taken images, the computed new images having a second frame rate different from the first frame rate, and an image output device (5) for outputting the continuously computed new images at the second frame rate.