In-Vehicle Image Sensor Resolution Segmentation for Data Transmission
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Solution Overview
Problem
Existing image processing systems for in-vehicle cameras face challenges in appropriately reducing pixel density in dynamic environments, leading to inadequate compression of image data captured by movable-body apparatuses.
Innovation Solution
An image generation device that receives travel information to selectively reduce the resolution of image data captured by an image sensor, dividing the image into segments with varying compression levels based on the travel state of the apparatus, thereby optimizing data transmission and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uniform compression is applied to the entire image data, then data transmission efficiency is improved, but object detection accuracy deteriorates
Solution Approach 1:
The image data is divided into multiple regions of interest based on travel information, with each region assigned different compression levels. Critical regions containing potential objects maintain high resolution while non-critical regions are heavily compressed, resolving the contradiction between transmission efficiency and detection accuracy.
Solution Approach 2:
Different quality levels are applied to different parts of the image based on their importance. Regions determined to contain objects or potential objects maintain original high quality, while other regions are compressed to varying degrees, allowing efficient transmission without sacrificing detection accuracy in critical areas.
2Measurement precision
If high resolution is maintained for the entire image, then object detection accuracy is improved, but data transmission load increases
Solution Approach 1:
The image is segmented into regions requiring high resolution and regions acceptable for compression. By transmitting only necessary high-resolution data for object detection regions, the overall data transmission load is reduced while maintaining detection accuracy.
Solution Approach 2:
Instead of maintaining high resolution for the entire image, high resolution is applied only partially to regions where objects are detected or likely to be present. This partial application of high resolution significantly reduces data transmission load while preserving detection accuracy in critical areas.
3Productivity
If compression is applied to reduce data size, then transmission rate is reduced, but image quality deteriorates
Solution Approach 1:
Different compression levels are applied to different regions of the image based on their importance determined from travel information. Critical regions maintain high image quality with minimal or no compression, while non-critical regions accept higher compression, achieving both fast transmission and preserved quality where needed.
Data Source
AI summary
An image generation device includes a receiver and a controller. The receiver receives travel information about the travel state of a movable-body apparatus. The controller selects, based on the travel information, a first partial region from an entirety of a plurality of pixels of an image sensor or an entirety of image data captured by the image sensor, and generates image data in which a region other than the first partial region has a resolution lower than the resolution of the first partial region. The image sensor is to be mounted to the movable-body apparatus and is configured to capture an area in a traveling direction of the movable-body apparatus.