Orthodontic Image Simulation with 3D Tooth Model Projection
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Solution Overview
Problem
Current orthodontic communication methods rely on verbal descriptions or two-dimensional static model photos, leading to misconceptions and disputes between patients and dentists regarding expected versus actual surgical outcomes.
Innovation Solution
An image simulation method and device that capture face videos, identify face and tooth feature points, adjust a three-dimensional tooth model to match the patient's teeth, and project the adjusted model onto the video to simulate post-orthodontic results, providing a clear visual reference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If verbal or two-dimensional static model photos are used for orthodontic communication, then the communication process is simple, but the accuracy of expected effect representation is poor leading to misconceptions and disputes
Solution Approach 1:
The patent transitions from two-dimensional static photos to three-dimensional dynamic video simulation. By extracting feature points from video frames and mapping them to a 3D tooth model, the system creates a realistic dynamic simulation that accurately represents expected orthodontic results, resolving the contradiction between representation accuracy and system complexity
Solution Approach 2:
The system creates a virtual copy of the patient's actual teeth by extracting feature points from video images and matching them with corresponding points on a 3D tooth model. This virtual model is then animated to simulate post-orthodontic results, providing an accurate visual copy that avoids misconceptions while maintaining manageable system complexity
2Measurement precision
If a three-dimensional tooth model is adjusted and projected onto face video in real-time, then the visual representation accuracy is improved, but the processing complexity increases
Solution Approach 1:
The system performs preliminary actions by pre-extracting feature points from the video, pre-matching them with the 3D model, and pre-adjusting the tooth model parameters. This preparation work is done before the actual simulation display, enabling real-time presentation without excessive processing complexity during the demonstration phase
Solution Approach 2:
The patent divides the complex processing task into distinct segments: face feature point extraction, mouth area identification, tooth feature point extraction, 3D model adjustment, and video projection. By segmenting the process, each module can be optimized independently, improving visual accuracy while keeping overall processing complexity manageable
Data Source
AI summary
An image simulation method for orthodontics is provided. First, receive a face video and capturing a face image from the face video and find a plurality of face feature points on the face image to determine a mouth area. Then, acquire a tooth image in the mouth area. Define a plurality of tooth image feature points according to the tooth image. Subsequently, compare a plurality of preset tooth model feature points of the stereo tooth model and the tooth image feature points, to adjust the preset tooth model feature points to conform to the tooth image feature points and further to form an adjusted stereo tooth model. Then, project the adjusted stereo tooth model to the face video. An image simulation device for orthodontics is also provided.