Light Field Image Display with Refocusability Color Coding
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Solution Overview
Problem
Conventional techniques for light field photography cannot distinguish between refocusable and non-refocusable still images, making it difficult for users to determine if an image can be refocused unless they specify the subject to be in focus.
Innovation Solution
An image display apparatus and method that acquires and displays image files containing reconstructable light field data, allowing users to differentiate between reconstructable and non-reconstructable image data by displaying them in distinct modes, using a control unit to inform users of the image file's refocusability and employing a microlens array with photoelectric converting elements for image capturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional light field photography techniques are used to capture refocusable images, then the capability to refocus after capture is achieved, but the user cannot distinguish between refocusable and non-refocusable images without specifying a subject
Solution Approach 1:
The patent applies color changes by displaying refocusable images with a specific color tone (e.g., yellowish tint) and non-refocusable images with a different color tone (e.g., bluish tint). This visual differentiation through color allows users to immediately identify which images can be refocused without needing to specify subjects or access additional menus, directly resolving the contradiction between preserving refocusability information and ease of user identification.
2Reliability
If multiple images are captured to ensure different subjects are in focus, then complete coverage of all subjects is achieved, but the number of captures and processing time increases
Solution Approach 1:
The patent applies preliminary action by capturing a single light field image that contains information about multiple subjects at different depths, then performing refocus processing afterward to bring different subjects into focus. This eliminates the need to capture multiple images beforehand, as all the necessary light field data is captured in one shot and can be processed later to achieve focus on any subject within the scene.
3Adaptability or versatility
If refocus processing is performed on all captured images, then the ability to refocus any subject is achieved, but the processing complexity and time increase
Solution Approach 1:
The patent applies self-service by having the system automatically determine whether captured images are refocusable based on their characteristics (e.g., whether they were captured with a light field camera), and automatically applying appropriate color tones to indicate refocusability. This automated classification and marking system eliminates the need for complex manual processing or user intervention to determine which images can be refocused, reducing processing complexity while maintaining 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 users to easily identify refocusable images and display them accordingly, reducing the need for multiple captures and enhancing user interaction by clearly indicating which images can be refocused.
Implementation Method 1
a microlens array is placed behind a main lens and a camera array in which small cameras are arranged. With both image capturing apparatuses, multi-viewpoint image data obtained by capturing images of subjects in different directions can be obtained through one capture.
Data Source
AI summary
An image display apparatus includes an acquisition unit configured to acquire an image file that includes reconstructable image data that includes information corresponding to a light field, a display unit configured to display the image data included in the image file acquired by the acquisition unit as an image, and a control unit configured to control the display unit so as to display an image and perform display for informing a user that the image file corresponding to the image is a reconstructable image file.