3D Model Annotation with 2D Signs of Use
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Solution Overview
Problem
3D models often lack signs of use, such as wear and tear or damage, which are not captured in their idealized representations, making them less accurate for real-world simulations and assessments.
Innovation Solution
A method that annotates 3D models with signs of use by projecting and matching signs from 2D images, allowing for deformation of the 3D model to accurately represent real-world instances, using data processing apparatus to compute and compare positions of signs in larger and smaller field of view images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 3D models are used as idealized abstractions for design and testing, then the models maintain simplicity and computational efficiency, but they fail to capture real-world signs of use such as wear, damage, and deformation
Solution Approach 1:
The patent uses 2D images as copies of real-world objects to transfer signs of use onto 3D models. By capturing images of actual objects and projecting their features onto digital models, the system replicates real-world characteristics without manually creating complex 3D annotations, thus improving reliability while managing complexity
Solution Approach 2:
The patent introduces 2D images as an intermediary between real-world objects and 3D models. These images serve as a bridge that captures signs of use from physical objects and enables their transfer to digital models through projection and matching algorithms, resolving the contradiction between model accuracy and annotation complexity
2Measurement precision
If multiple 2D images with different fields of view are processed to annotate 3D models, then the accuracy of sign projection improves, but the computational complexity and processing time increase
Solution Approach 1:
The patent performs preliminary pose estimation and sign detection on images before the actual projection process. By pre-processing images to identify signs of use and estimate object poses in advance, the system reduces computational complexity during the main annotation process, balancing precision with processing time
Solution Approach 2:
The patent segments the annotation process into distinct stages: detecting signs in individual images, estimating poses for each image, matching signs across multiple images, and finally projecting onto the 3D model. This segmentation allows parallel processing of independent image analyses while maintaining overall precision, reducing total processing time
Data Source
AI summary
Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for annotation of 3D models with signs of use that are visible in 2D images. In one aspect, methods are performed by data processing apparatus. The methods can include projecting signs of use in a relatively larger field of view image of an instance of an object onto a 3D model of the object based on a pose of the instance in the relatively larger field of view image, and estimating a relative pose of the instance of the object in a relatively smaller field of view image based on matches between the signs of use in the relatively larger field of view image and the same signs of use in the relatively smaller field of view image.