Display Apparatus Rendering Glossy Surfaces via Virtual Light Source
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Solution Overview
Problem
Current display apparatuses fail to effectively display images that change with light, viewing angles, or viewer positions, particularly in capturing the texture and appearance of glossy or rugged surfaces, such as those found in shells, butterfly wings, or Japanese paintings, which require advanced reflection modeling and light source simulation.
Innovation Solution
A display apparatus that generates images of an object viewed at multiple angles by changing the object's angle relative to a virtual light source, includes a selection and conversion unit to display the image at a different angle while maintaining the positional relationship between the virtual light source and object, utilizing 3DCG and texture scanning to acquire diffuse and specular reflection images, and calculate reflectance distribution functions for accurate surface representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a display apparatus displays images of objects, then the object appears on the display, but the image cannot accurately simulate the appearance of glossy or rugged surfaces and does not change with viewing angles
Solution Approach 1:
The patent applies dynamics by making the displayed image change adaptively based on the viewer's position and viewing angle. The conversion unit dynamically adjusts the image to reflect different angles while maintaining the virtual light source position, allowing the display to adapt to various viewing conditions rather than presenting a static image.
Solution Approach 2:
The patent changes parameters such as the angle of the object relative to the virtual light source to generate different images. By adjusting these parameters, the system can simulate how glossy or rugged surfaces appear at different angles, improving rendering accuracy while maintaining adaptability.
2Measurement precision
If the display shows an image at a specific angle, then the image is clear at that angle, but the image cannot maintain accurate appearance when viewed from different angles
Solution Approach 1:
The system dynamically converts the image based on the viewer's position, ensuring that the surface texture representation remains accurate regardless of viewing angle. This dynamic adjustment maintains both measurement precision for texture representation and viewing flexibility.
Solution Approach 2:
The patent incorporates feedback mechanisms where the system detects the viewer's position and adjusts the image accordingly. This feedback loop ensures that the image maintains accurate surface texture representation while adapting to different viewing angles, improving both precision and ease of operation.
3Manufacturing precision
If the display uses traditional imaging methods, then the device is simple, but it cannot capture and display diffuse and specular reflection characteristics of surfaces
Solution Approach 1:
The patent segments the reflection characteristics into separate components - diffuse reflection and specular reflection. By processing these components separately through the conversion unit, the system can accurately represent surface reflection characteristics while managing complexity through structured processing.
Solution Approach 2:
The conversion unit acts as an intermediary between the captured image and the final displayed image. It processes the image to maintain the virtual light source position while adjusting for different viewing angles, enabling accurate surface reflection representation without requiring complex hardware changes.
4Adaptability or versatility
If the display maintains a fixed virtual light source position, then the lighting setup is simple, but the image cannot accurately represent objects under varying lighting conditions
Solution Approach 1:
The patent changes parameters related to the virtual light source position and object angle to simulate different lighting conditions. By adjusting these parameters in the conversion unit, the system can adapt to varying lighting conditions while maintaining a relatively simple base system structure.
Data Source
AI summary
A display apparatus includes a generation unit that generates generation images when a certain object is viewed at a plurality of angles such that an angle of the object with respect to a virtual light source is changed on the basis of an image of the object, a selection unit that selects a first image in which the object is viewed at a first angle from among the generation images, as a selection image, a conversion unit that converts the first image into a conversion image in which the object is viewed at a second angle that is different from the first angle in a state in which a positional relationship between the virtual light source and the object in the first image is maintained, and a display unit that displays the conversion image.