Image Processing Device Adjusting Pixel-Luminance Characteristics for Low-Beam Recognition
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Solution Overview
Problem
In vehicle driving support systems, objects in images captured by cameras under low-beam headlamp conditions are difficult to recognize due to low pixel values in regions not irradiated by light, leading to poor object recognition.
Innovation Solution
An image processing device with an image acquiring unit, a light determining unit, and an adjusting unit that adjusts pixel-luminance characteristics to enhance pixel values in images acquired under low-beam conditions, increasing the dynamic range and sensitivity to improve object recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the head lamp is set to low beam, then energy consumption is reduced and glare to other drivers is minimized, but the luminance of objects in distance or side regions becomes low, making object recognition difficult
Solution Approach 1:
The patent changes the pixel-luminance conversion parameters based on the head lamp state. When in low-beam mode, the adjusting unit modifies the conversion characteristics to map low luminance values to higher pixel values, thereby compensating for the reduced illumination and improving object recognition accuracy without increasing energy consumption
Solution Approach 2:
The system dynamically adjusts the pixel-luminance relationship according to the head lamp state. The adjusting unit changes the conversion characteristics in real-time based on whether the head lamp is in high-beam or low-beam mode, allowing the image processing to adapt to varying illumination conditions and maintain recognition accuracy
2Illumination intensity
If the head lamp is set to high beam, then luminance of distant objects is improved, but pixel values in regions not irradiated by light remain low, still making object recognition difficult
Solution Approach 1:
The patent applies different pixel-luminance conversion parameters based on head lamp state. Even when high beam is active, the adjusting unit modifies the conversion characteristics to ensure that objects in non-irradiated regions achieve sufficient pixel values for recognition, optimizing the mapping relationship between luminance and pixel values for each operating condition
Data Source
AI summary
An image processing device is provided with an image acquiring unit that acquires the image from an imaging unit mounted on a vehicle, a light determining unit that determines a state of a light mounted on the vehicle, and an adjusting unit that adjusts a relationship between a luminance at an object to be captured by the imaging unit, and a pixel value in the image. The adjusting unit is configured to set, when the light determining unit determines the state of the light is in the low-beam state, the illuminance where the pixel value is at the lower limit, to be lower than that of a case when the light determining unit determines the state of the light is in the high-beam state.