Captured Image Focus Ranking Using Defocus Range and Focal Ratio
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Solution Overview
Problem
Existing image selection methods, such as those based on face area and focal position, are inadequate for accurately selecting captured images focused on the desired position, requiring significant time and effort when dealing with large numbers of images.
Innovation Solution
An image processing device that calculates the defocus range and focal ratio of captured images using machine learning and phase detection AF, allowing for the selection and display of images based on these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If captured images are selected based only on face area and focal position, then the selection process is simplified, but the accuracy of selecting images focused on the desired position deteriorates
Solution Approach 1:
The patent introduces a new parameter (focal ratio) in addition to the existing parameters (face area, focal position) to improve image selection accuracy. By calculating the focal ratio based on defocus range information and using it as a selection criterion, the system achieves more precise focus assessment without compromising operational simplicity.
2Measurement precision
If a large number of captured images are checked manually to select focused images, then selection accuracy is maintained, but the time and effort required increases significantly
Solution Approach 1:
The patent performs preliminary calculation of defocus range and focal ratio for each captured image and stores this information as incidental data. When image selection is needed, the pre-calculated focal ratios are directly used for rapid filtering and selection, eliminating the need for manual checking while maintaining high accuracy.
3Measurement precision
If detailed defocus range calculation is performed for each captured image, then image selection accuracy is improved, but the processing complexity increases
Solution Approach 1:
The patent leverages existing incidental information (defocus range) that is already captured and stored with each image. By reusing this pre-existing data to calculate focal ratio, the system achieves accurate defocus measurement without requiring additional complex hardware or processing mechanisms.
Data Source
AI summary
An image processing device includes calculation means for acquiring information including a defocus range of a captured image from storage means in which information including the defocus range of the captured image is stored as incidental information of the captured image, and calculating a focal ratio of the captured image based on the information including the defocus range, and display control means for performing display control of the captured image based on the focal ratio.