Character-Recognition Focus Detection for Image Acquisition Devices
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Solution Overview
Problem
Current focus detection methods for image acquisition devices are outdated and inadequate, failing to meet the needs of manufacturers for flexible and accurate focus performance testing.
Innovation Solution
A focus detection method utilizing character recognition technology to determine the focus performance of image acquisition devices by acquiring images of blurred characters and adjusting focusing parameters based on recognition results, employing Gaussian blurring processes to establish critical recognition states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional focus detection methods are used, then the detection process is simple, but the detection accuracy and flexibility are insufficient
Solution Approach 1:
The patent introduces character recognition technology as an intermediary between the image acquisition device and the focus detection system. Instead of directly measuring focus parameters, the system uses character recognition results as a mediator to indirectly evaluate focus quality, thereby improving detection accuracy while keeping the system relatively simple
Solution Approach 2:
The patent replaces traditional mechanical or optical focus detection mechanisms with a computational approach using character recognition algorithms. This substitution of mechanical systems with information processing methods enables more flexible and accurate focus evaluation without requiring complex physical measurement devices
2Adaptability or versatility
If character recognition technology is used for focus detection, then the flexibility and accuracy of focus detection are improved, but the detection process becomes more complex
Solution Approach 1:
The patent applies character recognition technology, which is a universal technology with broad applicability, to the specific task of focus detection. This multi-functional approach allows the same character recognition system to be used for different detection scenarios and requirements, thereby improving flexibility without proportionally increasing complexity
Solution Approach 2:
The patent adjusts the clarity parameter of test characters to create different focus conditions. By changing the clarity parameter of the test object rather than modifying the detection system itself, the method achieves high flexibility in evaluating different focus states while maintaining a relatively simple detection framework
Data Source
AI summary
A focus detection method includes: acquiring an image of a test object through a to-be-tested image acquisition device, the test object including a character, and a clarity of the character corresponding to a minimum clarity with which a content of the character is still able to be recognized using a character recognition technology; performing character recognition on the image to obtain a recognition result; and determining a focus detection result for the to-be-tested image acquisition device based on the recognition result.