Imaging Unit Stabilization Evaluation With Off-Axis Feature Points
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Solution Overview
Problem
Existing evaluating apparatuses cannot accurately evaluate the image stabilizing performance of an imaging unit around the optical axis.
Innovation Solution
An evaluating apparatus that includes an object with feature points off the optical axis, an excitation unit to induce camera shake, and an evaluating unit to analyze images captured by the imaging unit during excitation, allowing for precise evaluation of image stabilizing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an existing evaluating apparatus is used to measure image stabilizing function, then the measurement can be performed, but the accuracy of evaluation around the optical axis is insufficient
Solution Approach 1:
The patent segments the feature points into two categories: first feature points located off the optical axis and second feature points located on the optical axis. This segmentation allows independent evaluation of image stabilizing performance in different regions, enabling accurate measurement around the optical axis while maintaining overall system functionality.
Solution Approach 2:
The patent introduces an excitation unit as an intermediary device that generates controlled vibrations to excite the imaging unit. This intermediary enables the evaluation apparatus to simulate real-world shaking conditions and accurately measure image stabilizing performance without requiring actual handheld operation, thereby improving measurement precision and reliability.
2Measurement precision
If feature points are positioned only on the optical axis for evaluation, then optical axis performance can be measured, but off-axis stabilizing performance cannot be assessed
Solution Approach 1:
The patent designs the evaluation apparatus to simultaneously evaluate image stabilizing performance both on and off the optical axis by incorporating both first feature points (off-axis) and second feature points (on-axis). This multi-functional approach allows a single apparatus to comprehensively assess overall image stabilizing performance, covering all spatial regions relevant to imaging.
Solution Approach 2:
The patent extends the evaluation from a one-dimensional optical axis measurement to a two-dimensional spatial evaluation by adding off-axis feature points. This dimensional expansion enables the system to assess image stabilizing performance across the entire field of view, not just along the central axis, thereby improving comprehensive evaluation capability.
Data Source
AI summary
An evaluating apparatus is configured to evaluate image stabilizing performance of an imaging unit around an optical axis. The evaluating apparatus includes an object disposed to face the imaging unit, the object having a first feature point at a position different from the optical axis of the imaging unit, an excitation unit configured to excite the imaging unit, and an evaluating unit configured to evaluate an image of the object captured by the imaging unit that is being excited by the excitation unit.