Display Device Reproducing Photographic Print Appearance
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Solution Overview
Problem
Display devices struggle to replicate the reflective and environmental light interaction characteristics of traditional photographic prints, leading to a mismatch in appearance between printed and digital media.
Innovation Solution
A method involving the creation of an environment model and a surface model using light sensors and cameras to simulate the reflective properties of a photographic print on a display device, allowing for the generation of an output image that mimics the effect of ambient light conditions on the input image, thereby replicating the appearance of a photographic print.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a reflective medium like photographic print is used, then the appearance and environmental light interaction are accurate, but the device cannot be made portable and viewable in various orientations
Solution Approach 1:
The patent creates a digital copy of the reflective surface properties through computational models (BRDF models) that simulate how light interacts with the print surface. Instead of using the actual physical print, the system captures and stores the optical characteristics as data, allowing the appearance to be reproduced on emissive display devices without the physical constraints of paper-based media.
Solution Approach 2:
The patent replaces the physical reflective surface (mechanical/optical system) with a computational model and emissive display system. The BRDF model mathematically represents light reflection properties, and the display device emits light to simulate the appearance, substituting the mechanical reflection process with digital computation and active light emission.
2Adaptability or versatility
If an emissive display device is used, then portability and viewing flexibility are improved, but the appearance and environmental light interaction characteristics are lost
Solution Approach 1:
The system creates a digital representation (copy) of the environmental lighting conditions and surface reflection characteristics. By capturing the environment model and applying it to the display, the system reproduces the appearance of light interaction without requiring actual environmental light sources or reflective surfaces, maintaining accuracy while enabling portability.
Solution Approach 2:
The patent changes the fundamental parameters of light interaction from passive reflection to active emission. The display device controls its own light output based on computational models, transforming the physical light-matter interaction into a controllable electronic process that can replicate reflective appearances through software algorithms.
3Measurement precision
If the display device simulates reflective properties, then appearance accuracy is improved, but computational complexity and processing requirements increase
Solution Approach 1:
The system performs preliminary computation by pre-calculating and storing BRDF models and environment models before actual display occurs. The computational models are prepared in advance, allowing the display device to simply apply pre-computed results rather than performing complex real-time simulations, reducing instantaneous processing requirements while maintaining accuracy.
Solution Approach 2:
The patent introduces computational models (BRDF models, environment models) as intermediary representations between the physical print properties and the display output. These models act as mediators that encapsulate complex light interaction physics in a simplified mathematical form, allowing accurate appearance reproduction without direct complex computation during display.
Data Source
AI summary
Methods and apparatus for reproducing the appearance of a photographic print on a display device are disclosed. An environment model is built from received light conditions at a light sensor attached to a display surface. The environment model and a surface model are applied to an input image to generate an output image. The surface model represents reflective characteristics of a simulated surface on which display of the input image is simulated. The output image simulates an effect of the received light conditions on the input image as simulated on the surface.