Camera Band-Limiting Malfunction Detection via Point Spread Function
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for recognizing band-limiting malfunctions in vehicle cameras are inefficient and require laboratory conditions, making it difficult to detect resolution issues during actual vehicle operation.
Innovation Solution
A method that captures an image of an external measurement object using the vehicle's camera to determine the point spread function based on brightness distribution, allowing for precise detection of band-limiting malfunctions during normal operation, using a test pattern or luminous light source to assess the camera's resolution and apply image enhancement filters as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the camera is examined under laboratory conditions to determine resolution, then measurement precision is improved, but ease of operation deteriorates and loss of time increases
Solution Approach 1:
The camera system performs self-diagnosis by automatically capturing images of measurement objects in the environment and evaluating its own resolution capabilities through point spread function analysis, eliminating the need for external laboratory examination equipment and procedures
Solution Approach 2:
The system continuously captures images of measurement objects embedded in the environment during normal operation, preparing resolution data in advance so that band-limiting malfunctions can be detected immediately when they occur without requiring scheduled laboratory visits
2Measurement precision
If the camera is examined under laboratory conditions, then measurement precision is improved, but productivity deteriorates
Solution Approach 1:
The camera continuously captures images of measurement objects during normal vehicle operation, enabling ongoing resolution monitoring without interrupting productivity. The system performs resolution evaluation as a continuous background process rather than a periodic laboratory task
3Ease of operation
If the measurement object is arranged in the environmental area, then ease of operation is improved, but measurement precision may deteriorate
Solution Approach 1:
The system uses feedback from multiple image captures of the measurement object at different positions and conditions to statistically determine the point spread function, compensating for environmental variations and maintaining measurement precision while using easily accessible environmental objects
Solution Approach 2:
The measurement object is embedded in the environment as a permanent reference feature, creating a consistent visual target that can be repeatedly captured and analyzed without requiring physical manipulation or special laboratory setup
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
Enables efficient and precise detection of band-limiting malfunctions in vehicle cameras during operation, improving image quality by applying image enhancement filters and ensuring safer vehicle operation by identifying resolution issues in real-time.
Implementation Method 1
an image of a measurement object, which is external to the motor vehicle, is captured by means of the camera arranged on the motor vehicle
Implementation Method 2
an image of a measurement object, which is external to the motor vehicle, is captured by means of the camera arranged on the motor vehicle
Implementation Method 3
the band-limiting malfunction of the camera can be given for instance through influential factors such as diffraction phenomena on diaphragms of the camera
Data Source
AI summary
The invention relates to a method for recognizing a band-limiting malfunction of a camera (3) of a motor vehicle (1), in which during the operation of the motor vehicle (1) an image (12) of a measurement object (9), which is external to the motor vehicle, is captured by means of the camera (3) arranged on the motor vehicle (1), and in the image (12) a point spread function (14) is determined on the basis of a brightness distribution (16) along a profile through a pixel with a brightness, which exceeds a brightness threshold value, of the measurement object (13) shown in the image (12), and on the basis of the determined point spread function (14) a property value of a property of the camera (3) is determined, and the band-limiting malfunction of the camera (3) is recognized, in case the property value of the camera (3) is smaller than a property threshold value.