Dental Smile Simulation with Depth-Aware Color Accuracy

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Solution Overview

Problem

Existing techniques for generating simulated images of dental treatment outcomes fail to accurately depict the coloration of teeth, leading to unrealistic and discolored representations.

Innovation Solution

The use of global blurring functions that incorporate both x,y pixel locations and depth information, combined with generative adversarial networks (GANs), to generate accurate and realistic color data for simulated images of dental treatment outcomes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If traditional image generation techniques are used, then the generation process is simple, but the coloration accuracy of teeth is poor

Engineering Contradiction:
Improvecoloration accuracyVSAvoidsystem complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent introduces depth maps as an intermediary element between the input image and the final simulated output. The depth map encodes three-dimensional spatial information about tooth positions and orientations, which serves as a mediator to guide the GAN in generating accurate coloration. This intermediary allows the system to transfer color properties from the input image to the simulated output while maintaining spatial accuracy, resolving the contradiction between simple generation processes and accurate coloration.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent transforms the input image into a depth map by analyzing pixel intensity values and determining depth parameters for different regions. This parameter transformation converts two-dimensional image data into three-dimensional spatial information, which is then used to guide the coloration process. By changing parameters from simple pixel values to depth-encoded spatial coordinates, the system achieves accurate coloration while maintaining computational efficiency.

Inventive Principle:
Principle #35Parameter changes

2Manufacturing precision

If global blurring functions with depth information are used, then color transition accuracy is improved, but computational complexity increases

Engineering Contradiction:
Improvecolor transition accuracyVSAvoidcomputational power
Core Design Contradiction:
Manufacturing precisionVSPower

Solution Approach 1:

The patent segments the image processing into distinct stages: depth map generation, blur function application, and GAN-based image synthesis. By dividing the computational task into separate modules, each handling a specific aspect of the problem, the system achieves accurate color transitions without requiring all computational resources to be engaged simultaneously. This segmentation allows for optimized resource allocation and reduces peak computational power requirements.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent performs preliminary processing by generating depth maps and determining blur functions before the main GAN-based image synthesis. This preliminary action prepares the spatial and color transition parameters in advance, allowing the GAN to focus solely on generating realistic tooth coloration and textures. By performing preparatory computations beforehand, the system reduces the computational burden during the final image generation phase.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS20250157096A1Smile simulation with accurate color
Publication Date: 2025.05.15 ALIGN TECHNOLOGY INC
  • US20250157096A1 patent drawing
  • US20250157096A1 patent drawing
  • US20250157096A1 patent drawing

AI summary

A method includes generating a blurred color representation of an estimated post-treatment arrangement of teeth of an individual to be used for generation of a simulated color image of a post-treatment smile of the individual based on first depth information of a color image of a pre-treatment smile, color information of the color image of the pre-treatment smile, and a simulated colorless image of the estimated post-treatment arrangement of the teeth that comprises second depth information. The method further includes generating the simulated color image of the post-treatment smile of the individual based on the blurred color representation of the estimated post-treatment arrangement of the teeth and the simulated colorless image of the estimated post-treatment arrangement of the teeth.