Imaging Sensor Tilt Control for Orthogonal Plane Depth of Field
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Solution Overview
Problem
Conventional imaging apparatuses fail to provide proper tilt control for imaging scenes containing planes orthogonal to the imaging optical axis, limiting the depth of field and focusing capabilities.
Innovation Solution
A control apparatus that determines a tilt angle by tilting an imaging sensor relative to the optical axis, using a contrast evaluation value from areas excluding the exclusion target area, to achieve optimal tilt control for deeper depth of field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tilt angle is determined based on evaluation value from plane orthogonal to imaging optical axis, then tilt control can be provided, but depth of field cannot be made deeper
Solution Approach 1:
The imaging area is divided into multiple predetermined areas, and tilt angles are calculated independently for each area based on focus information from that specific area. This segmentation allows different tilt angles to be applied to different regions, enabling deeper depth of field while maintaining accurate tilt control for each segment.
Solution Approach 2:
Different tilt angles are assigned to different areas of the imaging sensor based on local focus requirements. Each area receives a tilt angle optimized for its specific imaging needs, allowing the system to achieve deeper overall depth of field while maintaining reliable tilt control adapted to local characteristics of each region.
2Device complexity
If conventional tilt control is used without considering imaging scene, then simple control is maintained, but proper tilt control cannot be provided for scenes with orthogonal planes
Solution Approach 1:
The tilt control system dynamically adapts to different imaging scenes by calculating tilt angles based on focus information from multiple predetermined areas. The system automatically adjusts tilt angles according to the actual imaging requirements of each area, providing proper tilt control for various scenes including those with planes orthogonal to the imaging optical axis while maintaining relatively simple control architecture.
Data Source
AI summary
A control apparatus includes an angle control unit configured to change a tilt angle by tilting an imaging sensor, a first determination unit configured to determine a first area from among a plurality of areas in an image, an evaluation value acquisition unit configured to acquire a contrast evaluation value of each of second areas excluding the first area among the plurality of areas by changing the tilt angle through the angle control unit, and a second determination unit configured to determine the tilt angle for each area based on the contrast evaluation value acquired by the evaluation value acquisition unit, and determining the tilt angle of the image sensor based on the tilt angle determined for each area. The angle control unit tilts the image sensor so as to obtain the tilt angle determined by the second determination unit.