Temperature-Adaptive Camera Control for White Spot Noise Reduction
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Solution Overview
Problem
Existing camera systems face issues with white spot noise increasing with temperature, leading to decreased image brightness and blurriness due to conventional control methods that reduce amplification factor and increase aperture value.
Innovation Solution
A camera control device that adjusts the amplification factor and light emission based on temperature to maintain image brightness and reduce white spot noise, without increasing the aperture value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the amplification factor for the image signal is decreased to reduce white spot noise, then the white spot noise is reduced, but the brightness of the image decreases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the amplification factor based on temperature conditions. When the temperature of the imaging element is high, the amplification factor is decreased to reduce white spot noise. When the temperature is low, the amplification factor is increased to maintain image brightness. This temperature-dependent parameter adjustment resolves the contradiction between noise reduction and brightness maintenance.
2Object-generated harmful factors
If the aperture value is increased to reduce white spot noise, then the white spot noise is reduced, but the brightness of the image decreases and the image becomes blurry
Solution Approach 1:
The patent changes the aperture value parameter based on temperature conditions. When the imaging element temperature is high, the aperture value is decreased (aperture opening is enlarged) to improve light transmission and maintain brightness while reducing noise. When the temperature is low, the aperture value is increased (aperture opening is reduced) to control depth of field. This temperature-adaptive parameter change resolves the contradiction between noise reduction and brightness maintenance.
3Object-generated harmful factors
If the amplification factor is decreased and aperture value is increased to reduce white spot noise, then the white spot noise is reduced, but the image brightness decreases and the image becomes blurry
Solution Approach 1:
The patent implements feedback control by continuously monitoring the temperature of the imaging element and adjusting the amplification factor and aperture value accordingly. The control circuit receives temperature information and dynamically modifies system parameters to maintain optimal image quality. This feedback mechanism resolves the contradiction by adapting the system response to actual temperature conditions, preventing both noise accumulation and brightness loss.
Data Source
AI summary
Disclosed is a camera control device configured in such a way as to include: a temperature detection signal acquisition unit to acquire a temperature detection signal indicating the temperature of an imaging element to output an image signal indicating an object from a temperature sensor to detect the temperature of the imaging element; and a control unit to control the amplification factor for the image signal to be outputted from the imaging element and the amount of light emitted by a light emitting element to apply light to the object on the basis of the temperature detection signal acquired by the temperature detection signal acquisition unit.