Camera Control Unit Mode Switching for Rapid Exposure Adaptation
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Solution Overview
Problem
Existing camera systems with image sensors struggle to capture images accurately in environments with rapidly changing light intensity, as conventional control algorithms adjust exposure time slowly and may result in overexposed or underexposed images due to limited adaptation capabilities.
Innovation Solution
A system and method that allows the camera's control unit to switch between two modes: a first mode for repeated adjustments of exposure time based on measured brightness and a second mode using a predetermined exposure time reference value for rapid adjustment, enabling quick capture of images that are neither overexposed nor underexposed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the exposure time for the image sensor is increased to capture images in low brightness conditions, then the image quality improves (neither overexposed nor underexposed), but the time required to adapt to changing light conditions increases significantly
Solution Approach 1:
The patent implements dynamic mode switching between first mode (gradual exposure time adaptation) and second mode (rapid adaptation with predetermined reference values). The control unit dynamically selects the appropriate adaptation strategy based on scene change detection, enabling the system to transition from static exposure control to dynamic multi-mode operation that optimizes both image quality and adaptation speed.
Solution Approach 2:
The patent changes the exposure time parameter adaptation strategy by introducing predetermined exposure time reference values in the second mode. Instead of gradual step-by-step exposure time increases, the system jumps to predetermined reference values that are optimized for specific lighting conditions, thereby reducing adaptation time while maintaining image quality.
2Reliability
If the exposure time is increased in small steps using known control algorithms, then the risk of overexposure is reduced, but the time to achieve optimal exposure settings becomes very long
Solution Approach 1:
The patent segments the exposure time adaptation process into two distinct phases: first mode with gradual step-by-step exposure time increases for stable control, and second mode with jumps to predetermined reference values for rapid adaptation. This segmentation allows the system to combine the reliability of gradual adaptation with the speed of rapid mode switching.
Solution Approach 2:
The control unit periodically evaluates whether to switch between first mode and second mode based on scene change detection. This periodic evaluation enables the system to alternate between conservative gradual adaptation and aggressive rapid adaptation, optimizing both reliability and productivity based on current lighting conditions.
3Measurement precision
If the control algorithm reduces exposure time in small steps after overexposure, then precise exposure control is achieved, but the overall adaptation process becomes extremely slow
Solution Approach 1:
The patent pre-calculates and stores predetermined exposure time reference values that are optimized for different lighting conditions. When a scene change is detected, the system immediately jumps to the appropriate predetermined reference value instead of performing time-consuming step-by-step adjustments, thereby reducing total adaptation duration while maintaining exposure precision.
Solution Approach 2:
The second mode enables the system to skip intermediate exposure time values and directly jump to predetermined reference values. This rushing through of intermediate steps significantly reduces the time required to achieve optimal exposure settings while maintaining measurement precision through the use of pre-optimized reference values.
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 fast and accurate adjustment of exposure time to ensure images are captured correctly, even in rapidly changing light conditions, reducing the time required to achieve optimal exposure settings.
Implementation Method 1
a camera (4) with an image sensor (6) for optically capturing a capturing region (8)
Data Source
AI summary
A system and a method for the system, wherein the system includes a camera and a control unit for controlling the camera, which is formed by an associated image sensor for optically capturing a capturing region, wherein the control unit may switch between a first mode and a second mode as a function of a scene change in the recording space.