RetrievalFuse: Neural 3D Scene Reconstruction with A Database

RetrievalFuse

Paper | Project Page | Video

RetrievalFuse: Neural 3D Scene Reconstruction with a Database
Yawar Siddiqui, Justus Thies, Fangchang Ma, Qi Shan, Matthias Nießner, Angela Dai
ICCV2021

This repository contains the code for the ICCV 2021 paper RetrievalFuse, a novel approach for 3D reconstruction from low resolution distance field grids and from point clouds.

In contrast to traditional generative learned models which encode the full generative process into a neural network and can struggle with maintaining local details at the scene level, we introduce a new method that directly leverages scene geometry from the training database.

File and Folders

Broad code structure is as follows:

File / Folder	Description
`config/super_resolution`	Super-resolution experiment configs
`config/surface_reconstruction`	Surface reconstruction experiment configs
`config/base`	Defaults for configurations
`config/config_handler.py`	Config file parser
`data/splits`	Training and validation splits for different datasets
`dataset/scene.py`	SceneHandler class for managing access to scene data samples
`dataset/patched_scene_dataset.py`	Pytorch dataset class for scene data
`external/ChamferDistancePytorch`	For calculating rough chamfer distance between prediction and target while training
`model/attention.py`	Attention, folding and unfolding modules
`model/loss.py`	Loss functions
`model/refinement.py`	Refinement network
`model/retrieval.py`	Retrieval network
`model/unet.py`	U-Net model used as a backbone in refinement network
`runs/`	Checkpoint and visualizations for experiments dumped here
`trainer/train_retrieval.py`	Lightning module for training retrieval network
`trainer/train_refinement.py`	Lightning module for training refinement network
`util/arguments.py`	Argument parsing (additional arguments apart from those in config)
`util/filesystem_logger.py`	For copying source code for each run in the experiment log directory
`util/metrics.py`	Rough metrics for logging during training
`util/mesh_metrics.py`	Final metrics on meshes
`util/retrieval.py`	Script to dump retrievals once retrieval networks have been trained; needed for training refinement.
`util/visualizations.py`	Utility scripts for visualizations

Further, the data/ directory has the following layout

data                    # root data directory
├── sdf_008             # low-res (8^3) distance fields
    ├── <dataset_0>     
        ├── <sample_0>
        ├── <sample_1>
        ├── <sample_2>
        ...
    ├── <dataset_1>
    ...
├── sdf_016             # low-res (16^3) distance fields
    ├── <dataset_0>
        ├── <sample_0>
        ├── <sample_1>
        ├── <sample_2>
        ...
    ├── <dataset_1>
    ...
├── sdf_064             # high-res (64^3) distance fields
    ├── <dataset_0>
            ├── <sample_0>
            ├── <sample_1>
            ├── <sample_2>
            ...
        ├── <dataset_1>
        ...
├── pc_20K              # point cloud inputs
    ├── <dataset_0>
        ├── <sample_0>
        ├── <sample_1>
        ├── <sample_2>
        ...
    ├── <dataset_1>
    ...
├── splits              # train/val splits
├── size                # data needed by SceneHandler class (autocreated on first run)
├── occupancy           # data needed by SceneHandler class (autocreated on first run)

Dependencies

Install the dependencies using pip

pip install -r requirements.txt

Be sure that you pull the ChamferDistancePytorch submodule in external.

Data Preparation

For ShapeNetV2 and Matterport, get the appropriate meshes from the datasets. For 3DFRONT get the 3DFUTURE meshes and 3DFRONT scripts. For getting 3DFRONT meshes use our fork of 3D-FRONT-ToolBox to create room meshes.

Once you have the meshes, use our fork of sdf-gen to create distance field low-res inputs and high-res targets. For creating point cloud inputs simply use trimesh.sample.sample_surface (check util/misc/sample_scene_point_clouds). Place the processed data in appropriate directories:

data/sdf_008/<dataset> or data/sdf_016/<dataset> for low-res inputs

data/pc_20K/<dataset> for point clouds inputs

data/sdf_064/<dataset> for targets

Training the Retrieval Network

Make sure that CUDA_HOME variable is set. To train retrieval networks use the following command:

python trainer/train_retrieval.py --config config/<config> --val_check_interval 5 --experiment retrieval --wandb_main --sanity_steps 1

We provide some sample configurations for retrieval.

For super-resolution, e.g.

config/super_resolution/ShapeNetV2/retrieval_008_064.yaml
config/super_resolution/3DFront/retrieval_008_064.yaml
config/super_resolution/Matterport3D/retrieval_016_064.yaml

For surface-reconstruction, e.g.

config/surface_reconstruction/ShapeNetV2/retrieval_128_064.yaml
config/surface_reconstruction/3DFront/retrieval_128_064.yaml
config/surface_reconstruction/Matterport3D/retrieval_128_064.yaml

Once trained, create the retrievals for train/validation set using the following commands:

python util/retrieval.py  --mode map --retrieval_ckpt <trained_retrieval_ckpt> --config <retrieval_config>

python util/retrieval.py --mode compose --retrieval_ckpt <trained_retrieval_ckpt> --config <retrieval_config>

Training the Refinement Network

Use the following command to train the refinement network

python trainer/train_refinement.py --config <config> --val_check_interval 5 --experiment refinement --sanity_steps 1 --wandb_main --retrieval_ckpt <retrieval_ckpt>

Again, sample configurations for refinement are provided in the config directory.

For super-resolution, e.g.

config/super_resolution/ShapeNetV2/refinement_008_064.yaml
config/super_resolution/3DFront/refinement_008_064.yaml
config/super_resolution/Matterport3D/refinement_016_064.yaml

For surface-reconstruction, e.g.

config/surface_reconstruction/ShapeNetV2/refinement_128_064.yaml
config/surface_reconstruction/3DFront/refinement_128_064.yaml
config/surface_reconstruction/Matterport3D/refinement_128_064.yaml

Visualizations and Logs

Visualizations and checkpoints are dumped in the runs/<experiment> directory. Logs are uploaded to the user's Weights&Biases dashboard.

Processed Data & Models (ShapeNet)

Download processed data for ShapeNetV2 dataset using the following command

bash data/download_shapenet_processed.sh

This will populate the data/sdf_008, data/sdf_064, data/pc_20K, data/occupancy and data/size folders with processed ShapeNet data.

To download trained models on ShapeNetV2 use the following script

bash data/download_shapenet_models.sh

This downloads the checkpoints for retrieval and refinement for ShapeNet on both super-resolution and surface reconstruction tasks, plus the already computed retrievals. You can resume training these with the --resume flag in appropriate scripts (or inference with --sanity_steps flag). E.g. for resuming (and / or dumping inferences from data/splits/ShapeNetV2/main/val_vis.txt) use the following command

# super-resolution
python trainer/train_refinement.py --config config/super_resolution/ShapeNetV2/refinement_008_064.yaml  --sanity_steps -1 --resume runs/checkpoints/superres_refinement_ShapeNetV2.ckpt --retrieval_ckpt runs/07101959_superresolution_ShapeNetV2_upload/_ckpt_epoch=79.ckpt --current_phase 3 --max_epoch 161 --new_exp_for_resume

# surface-reconstruction
python trainer/train_refinement.py --config config/surface_reconstruction/ShapeNetV2/refinement_128_064.yaml  --sanity_steps -1 --resume runs/checkpoints/surfacerecon_refinement_ShapeNetV2.ckpt --retrieval_ckpt runs/07101959_surface_reconstruction_ShapeNetV2_upload/_ckpt_epoch=59.ckp --current_phase 3 --max_epoch 161 --new_exp_for_resume

Citation

If you find our work useful in your research, please consider citing:

@inproceedings{siddiqui2021retrievalfuse,
  title = {RetrievalFuse: Neural 3D Scene Reconstruction with a Database},
  author = {Siddiqui, Yawar and Thies, Justus and Ma, Fangchang and Shan, Qi and Nie{\ss}ner, Matthias and Dai, Angela},
  booktitle = {Proc. International Conference on Computer Vision (ICCV)},
  month = oct,
  year = {2021},
  doi = {},
  month_numeric = {10}
}

License

The code from this repository is released under the MIT license.

Author: nihalsid
Source Code: https://github.com/nihalsid/retrieval-fuse
#database

What is GEEK

Buddha Community

RetrievalFuse: Neural 3D Scene Reconstruction with A Database

Ruth Nabimanya

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System Databases in SQL Server

Introduction

In SSMS, we many of may noticed System Databases under the Database Folder. But how many of us knows its purpose?. In this article lets discuss about the System Databases in SQL Server.

System Database

Fig. 1 System Databases

There are five system databases, these databases are created while installing SQL Server.

Master
Model
MSDB
Tempdb
Resource

Master

This database contains all the System level Information in SQL Server. The Information in form of Meta data.
Because of this master database, we are able to access the SQL Server (On premise SQL Server)

Model

This database is used as a template for new databases.
Whenever a new database is created, initially a copy of model database is what created as new database.

MSDB

This database is where a service called SQL Server Agent stores its data.
SQL server Agent is in charge of automation, which includes entities such as jobs, schedules, and alerts.

TempDB

The Tempdb is where SQL Server stores temporary data such as work tables, sort space, row versioning information and etc.
User can create their own version of temporary tables and those are stored in Tempdb.
But this database is destroyed and recreated every time when we restart the instance of SQL Server.

Resource

The resource database is a hidden, read only database that holds the definitions of all system objects.
When we query system object in a database, they appear to reside in the sys schema of the local database, but in actually their definitions reside in the resource db.

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Django Packages

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Django-allauth: A simple Boilerplate to Setup Authentication

Django-Authentication

A simple Boilerplate to Setup Authentication using Django-allauth, with a custom template for login and registration using django-crispy-forms.

Getting Started

Prerequisites

Python 3.8.6 or higher

Project setup

# clone the repo
$ git clone https://github.com/yezz123/Django-Authentication

# move to the project folder
$ cd Django-Authentication

Creating virtual environment

Create a virtual environment for this project:

# creating pipenv environment for python 3
$ virtualenv venv

# activating the pipenv environment
$ cd venv/bin #windows environment you activate from Scripts folder

# if you have multiple python 3 versions installed then
$ source ./activate

Configured Enviromment

Environment variables

SECRET_KEY = #random string
DEBUG = #True or False
ALLOWED_HOSTS = #localhost
DATABASE_NAME = #database name (You can just use the default if you want to use SQLite)
DATABASE_USER = #database user for postgres
DATABASE_PASSWORD = #database password for postgres
DATABASE_HOST = #database host for postgres
DATABASE_PORT = #database port for postgres
ACCOUNT_EMAIL_VERIFICATION = #mandatory or optional
EMAIL_BACKEND = #email backend
EMAIL_HOST = #email host
EMAIL_HOST_PASSWORD = #email host password
EMAIL_USE_TLS = # if your email use tls
EMAIL_PORT = #email port

change all the environment variables in the .env.sample and don't forget to rename it to .env.

Run the project

After Setup the environment, you can run the project using the Makefile provided in the project folder.

help:
 @echo "Targets:"
 @echo "    make install" #install requirements
 @echo "    make makemigrations" #prepare migrations
 @echo "    make migrations" #migrate database
 @echo "    make createsuperuser" #create superuser
 @echo "    make run_server" #run the server
 @echo "    make lint" #lint the code using black
 @echo "    make test" #run the tests using Pytest

Preconfigured Packages

Includes preconfigured packages to kick start Django-Authentication by just setting appropriate configuration.

Package	Usage
django-allauth	Integrated set of Django applications addressing authentication, registration, account management as well as 3rd party (social) account authentication.
django-crispy-forms	django-crispy-forms provides you with a `crispy` filter and `{% crispy %}` tag that will let you control the rendering behavior of your Django forms in a very elegant and DRY way.

Contributing

Django-Authentication is a simple project, so you can contribute to it by just adding your code to the project to improve it.
If you have any questions, please feel free to open an issue or create a pull request.

Download Details:
Author: yezz123
Source Code: https://github.com/yezz123/Django-Authentication
License: MIT License

#django #python

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