Vehicle Object Recognition for Tailgate Distance Jump Inhibition
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Solution Overview
Problem
Existing driving assistance systems experience erroneous behaviors due to misrecognition of an object's end position, leading to potential delayed braking or incorrect collision avoidance, particularly when a distance jump occurs as a truck's tailgate appears or disappears from the camera's field of view.
Innovation Solution
An object recognition apparatus is configured with a distance detector, a distance change determiner, and an inhibitor to assess the change in instantaneous distance to an object between consecutive frames, outputting an inhibition signal if the distance significantly decreases, thereby preventing the driving assistance apparatus from activating unnecessarily.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the driving assistance system calculates distance based on stereo camera images, then the system can perform driving assistance using the calculated distance, but a distance jump occurs when the tailgate appears or disappears from the captured image, causing misrecognition of the object's end position
Solution Approach 1:
The system performs preliminary detection of the object's position and characteristics before the tailgate appears or disappears. By tracking the object's movement trajectory and establishing its motion pattern in advance, the system can predict the object's position even when the tailgate is not visible, preventing distance jumps and maintaining reliable position recognition throughout the tailgate's appearance and disappearance cycles
Solution Approach 2:
The system continuously monitors the detected object position and compares it with the predicted position based on movement trajectory. When a discrepancy is detected (such as a sudden distance jump when the tailgate appears or disappears), the feedback mechanism triggers a correction using the established motion pattern, thereby maintaining measurement precision and reliability
2Reliability
If the system activates braking or warning based on detected distance, then collision avoidance is enabled, but unnecessary activation occurs when distance jumps are caused by tailgate appearance/disappearance rather than actual object movement
Solution Approach 1:
The system establishes the object's movement trajectory and speed pattern before activation decisions are made. This preliminary characterization allows the system to distinguish between genuine object approach (requiring braking or warning) and apparent approach caused by tailgate disappearance (not requiring activation), thereby preventing erroneous harmful factors while maintaining reliable collision avoidance
Solution Approach 2:
The movement trajectory analysis acts as an intermediary between the raw distance measurement and the braking/warning activation decision. By introducing this intermediate verification step, the system filters out false positives caused by tailgate appearance/disappearance while preserving genuine collision risks, thus eliminating erroneous activation without compromising collision avoidance reliability
Data Source
AI summary
In an object recognition apparatus to be mounted to a vehicle equipped with a driving assistance apparatus. In the object recognition apparatus, a distance detector is configured to repeatedly detect an instantaneous distance from the vehicle to an object located around the vehicle. A distance change determiner is configured to perform a determination regarding the instantaneous distance that is a determination as to whether the currently detected instantaneous distance to the object is less than the previously detected instantaneous distance to the same object and an amount of change in instantaneous distance between the currently detected instantaneous distance and the previously detected instantaneous distance is greater than a predetermined amount-of-change threshold. And, an inhibitor is configured to, in response to a result of determination by the distance change determiner being affirmative, output to the driving assistance apparatus an inhibition signal to inhibit activation of the driving assistance apparatus.