How OBJ Exporter for Revit Supports Deep Learning in Point Cloud Completion

Client Name
Hongzhe Yue

  • Technologies

    Revit

  • Domain

    Construction Technology & Research

Client Overview

Our client is a forward-thinking research team focused on automating as-built modeling of Mechanical, Electrical, and Plumbing (MEP) systems using AI and point cloud data. Their objective was to improve the accuracy of 3D reconstruction in construction environments where occlusion in point clouds presents significant challenges.

Project Overview

The research centered on applying deep learning (DL)-based point cloud completion algorithms to overcome the issue of missing or obstructed data in MEP scans. To do this effectively, the team needed a large dataset of synthetic point clouds derived from realistic BIM models of MEP systems. These point clouds would include controlled occlusions, allowing them to evaluate the performance of multiple DL models and training strategies.

 

This required a reliable method to convert Revit BIM models into OBJ format, from which synthetic point clouds could be simulated using tools like CloudCompare or custom Python scripts.

Challenges

  • Real-world MEP point clouds often suffer from heavy occlusions, making AI training difficult.
  • Lack of annotated and diverse datasets for DL algorithm development.
  • Need for a scalable way to generate synthetic point clouds from parametric BIM data.
  • Requirement for high-fidelity OBJ exports from Autodesk Revit without data loss.

Solutions

The client’s team used ProtoTech’s OBJ Exporter for Revit to convert detailed parametric BIM models of MEP systems into OBJ format. This became the foundation for generating synthetic, occlusion-simulated point clouds.

 

 “Using ProtoTech’s plugin, we were able to efficiently convert Revit BIM models into OBJ format files, which were then used to generate point clouds through CloudCompare or Python programming.”

 

The plugin’s seamless Revit integration and precise geometry export allowed the researchers to simulate realistic training data and evaluate five deep learning algorithms using various training strategies.

 

“The plugin’s seamless integration and reliable performance made it an indispensable tool for our projects.”

Benefits

  • Enabled cost-effective creation of synthetic point cloud datasets
  • Helped simulate occlusion scenarios for realistic DL training
  • Streamlined Revit-to-OBJ pipeline with minimal manual intervention
  • Supported research that identified top-performing DL models for point cloud completion
  • Results published in a peer-reviewed journal, validating the plugin’s value in cutting-edge construction AI research. Read the research article on ScienceDirect

Testimonial

"I was interested in point clouds generated by BIM models applied in the construction industry. Using ProtoTech Solutions' plugin, we were able to efficiently convert Revit BIM models into OBJ format files, which were then used to generate point clouds through CloudCompare or Python programming. Acquiring and annotating real point clouds was extremely expensive. This conversion method effectively addressed the shortage of training samples for deep learning on point clouds. The plugin's seamless integration and reliable performance made it an indispensable tool for our projects. Additionally, the customer service provided by ProtoTech Solutions was outstanding, always prompt in addressing our queries and ensuring we maximized the plugin's capabilities. I highly recommend this plugin to anyone working with BIM models and point clouds."

Hongzhe Yue

Construction Technology & Research

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