Multi-Group Pixel Exposure Control for Dynamic Range
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Solution Overview
Problem
Existing imaging devices struggle to set independent exposure control values for different pixel groups on a single imaging surface, leading to limitations in dynamic range expansion and requiring additional devices for correcting subject displacement.
Innovation Solution
A control device and method that sets distinct exposure control values for two pixel groups on a single imaging surface, allowing for independent exposure control and dynamic range setting, using a setting unit to configure different control values for each group before a photometric process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single dynamic range is set for multiple pixel groups, then exposure control can be simplified, but independent exposure control values cannot be set for each pixel group
Solution Approach 1:
The imaging element is divided into multiple pixel groups (first pixel group and second pixel group) with different sensitivities. Each pixel group is assigned independent exposure control values, allowing differentiated exposure control for high-sensitivity and low-sensitivity regions. This segmentation enables the system to overcome the limitation of single dynamic range while maintaining manageable complexity through structured organization.
2Adaptability or versatility
If independent exposure control values are set for different pixel groups, then dynamic range can be expanded, but device complexity increases due to additional correction devices
Solution Approach 1:
Multiple pixel groups with different sensitivities are integrated into a single imaging element, combining the functionality of multiple imaging optical systems into one unified structure. The control device coordinates exposure control for all pixel groups simultaneously, eliminating the need for separate imaging optical systems and their associated displacement correction devices, thus reducing overall system complexity while achieving expanded dynamic range.
3Device complexity
If exposure control is not performed, then device complexity is reduced, but dynamic range cannot be dynamically changed
Solution Approach 1:
The system implements dynamic exposure control by setting different exposure control values for different pixel groups based on the imaging conditions. The control device can adjust exposure parameters in real-time during image capture, enabling the dynamic range to be changed adaptively. This dynamic approach allows the system to respond to varying lighting conditions without requiring complex mechanical adjustments, maintaining simplicity while achieving versatility.
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 expanded dynamic range and high-speed exposure control, reducing the need for additional devices and improving photographing performance and autofocus accuracy.
Implementation Method 1
imaging elements that photo-electrically convert subject images have become widely available
Data Source
AI summary
There is provided a control device including a setting unit configured to set a first control value used for performing exposure control of a first pixel group and a second control value used for performing exposure control of a second pixel group, the first pixel group and the second pixel group being disposed in a single imaging surface. The setting unit sets the first control value and the second control value to different values before a predetermined photometric process is executed.