Virtual Image Acquisition for Glasses Brightness Attenuation
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Solution Overview
Problem
Existing facial image generation technologies are inadequate for capturing detailed eye movements and accurately simulating the effect of glasses in virtual reality (VR) environments, where the short shooting distance significantly impacts the imaging due to optical path changes caused by glasses.
Innovation Solution
A method and apparatus for determining image synthesis parameters, specifically a brightness attenuation parameter for glasses, by using a virtual image acquisition device with a virtual light source to simulate the change in brightness of a virtual face model before and after wearing glasses, allowing for accurate modification of images to reflect realistic glasses-wearing effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a virtual image acquisition device with a virtual light source is used to simulate brightness changes, then the accuracy of glasses effect simulation is improved, but the device complexity increases
Solution Approach 1:
The patent creates a virtual copy of the face model and uses a virtual light source to simulate the optical path changes caused by glasses. This virtual copying approach allows accurate brightness parameter measurement without requiring physical glasses or complex optical measurement equipment, thereby improving measurement accuracy while managing device complexity through software-based simulation.
Solution Approach 2:
The patent replaces physical optical measurement systems with a virtual image acquisition device that uses computational methods to simulate light path changes. This substitution eliminates the need for complex physical optical equipment while achieving accurate brightness parameter measurement through software-based optical path simulation.
2Reliability
If physical glasses are used for data acquisition, then the realism of the simulation is improved, but the data acquisition time and cost increase
Solution Approach 1:
The patent uses a virtual copy of the face model with a virtual light source to simulate the effect of wearing glasses. This approach eliminates the need for physical glasses and real-world photo shooting, significantly reducing data acquisition time while maintaining simulation realism through accurate optical path simulation in the virtual environment.
Solution Approach 2:
The patent performs preliminary simulation of the glasses effect in the virtual environment before actual data acquisition is needed. By pre-calculating and storing the brightness attenuation parameters and optical path changes in the virtual model, the system can quickly generate realistic glasses-wearing images without requiring time-consuming physical photo shooting sessions.
3Ease of manufacture
If traditional face generation technology is used, then the simplicity of the process is maintained, but the accuracy of eye area imaging is insufficient
Solution Approach 1:
The patent segments the face model into different regions, with special attention to the eye area. By separately processing and refining the eye region parameters while maintaining the overall simplicity of the face generation process, the system achieves accurate eye area imaging without complicating the entire production pipeline.
Solution Approach 2:
The patent applies local quality enhancement to the eye area specifically. While the overall face generation process remains simple, the eye region receives specialized processing to account for optical path changes caused by glasses, ensuring accurate imaging in this critical area without affecting the simplicity of the rest of the generation process.
Data Source
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Figure 3B~4A
AI summary
An image synthesis parameter determination method and apparatus, and an image synthesis method and apparatus. The image synthesis parameter determination method comprises: with the assistance of a virtual light source (202), using a virtual image acquisition device (301) to acquire a brightness parameter of a virtual facial model (201); and on the basis of a change in the brightness parameter of the virtual facial model (201) before and after the virtual facial model (201) wears glasses (203), determining a brightness attenuation parameter corresponding to the glasses (203).