open3d::data::Dataset Class Reference

Base Open3D dataset class. More...

#include <Dataset.h>

Inheritance diagram for open3d::data::Dataset:

Public Member Functions
	Dataset (const std::string &prefix, const std::string &data_root="")
	Parameterized Constructor. More...
virtual	~Dataset ()
const std::string	GetDataRoot () const
	Get data root directory. The data root is set at construction time or automatically determined. More...
const std::string	GetPrefix () const
	Get prefix for the dataset. More...
const std::string	GetDownloadDir () const
	Get absolute path to download directory. i.e. ${data_root}/${download_prefix}/${prefix}. More...
const std::string	GetExtractDir () const
	Get absolute path to extract directory. i.e. ${data_root}/${extract_prefix}/${prefix}. More...

Protected Attributes
std::string	data_root_
	Open3D data root. More...
std::string	prefix_
	Dataset prefix. More...

Detailed Description

Base Open3D dataset class.

The Dataset classes in Open3D are designed for convenient access to "built-in" example and test data. You'll need internet access to use the dataset classes. The downloaded data will be stored in the Open3D's data root directory.

• A dataset class locates the data root directory in the following order: (a) User-specified by data_root when instantiating a dataset object. (b) OPEN3D_DATA_ROOT environment variable. (c) $HOME/open3d_data. By default, (c) will be used, and it is also the recommended way.
• When a dataset object is instantiated, the corresponding data will be downloaded in ${data_root}/download/prefix/ and extracted or copied to ${data_root}/extract/prefix/. If the extracted data directory exists, the files will be used without validation. If it does not exists, and the valid downloaded file exists, the data will be extracted from the downloaded file. If downloaded file does not exists, or validates against the provided MD5, it will be re-downloaded.
• After the data is downloaded and extracted, the dataset object will NOT load the data for you. Instead, you will get the paths to the data files and use Open3D's I/O functions to load the data. This design exposes where the data is stored and how the data is loaded, allowing users to modify the code and load their own data in a similar way. Please check the documentation of the specific dataset to know more about the specific functionalities provided for it.

Constructor & Destructor Documentation

Dataset()

open3d::data::Dataset::Dataset	(	const std::string &	prefix,
		const std::string &	data_root = ""
	)

Parameterized Constructor.

Parameters

prefix	Prefix of the dataset. The data is downloaded in ${data_root}/download/${prefix}/ and extracted in ${data_root}/extract/${prefix}/.
data_root	Path to ${data_root}, which contains all the downloaded and extracted files. The data root directory is located in the following order: (a) User-specified by data_root when instantiating a dataset object. (b) OPEN3D_DATA_ROOT environment variable. (c) $HOME/open3d_data. By default, (c) will be used, and it is also the recommended way.

~Dataset()

virtual open3d::data::Dataset::~Dataset ( )

inlinevirtual

Member Function Documentation

GetDataRoot()

const std::string open3d::data::Dataset::GetDataRoot ( ) const

inline

Get data root directory. The data root is set at construction time or automatically determined.

GetDownloadDir()

const std::string open3d::data::Dataset::GetDownloadDir ( ) const

inline

Get absolute path to download directory. i.e. ${data_root}/${download_prefix}/${prefix}.

GetExtractDir()

const std::string open3d::data::Dataset::GetExtractDir ( ) const

inline

Get absolute path to extract directory. i.e. ${data_root}/${extract_prefix}/${prefix}.

GetPrefix()

const std::string open3d::data::Dataset::GetPrefix ( ) const

inline

Get prefix for the dataset.

Field Documentation

data_root_

std::string open3d::data::Dataset::data_root_

protected

Open3D data root.

prefix_

std::string open3d::data::Dataset::prefix_

protected

Dataset prefix.

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The documentation for this class was generated from the following files:

• /home/runner/work/Open3D/Open3D/cpp/open3d/data/Dataset.h (ed30e3b (Sat Feb 19 12:48:07 2022 -0800))
• /home/runner/work/Open3D/Open3D/cpp/open3d/data/Dataset.cpp (ed30e3b (Sat Feb 19 12:48:07 2022 -0800))