Function mindspore::dataset::LSUN

• Defined in File datasets.h

Function Documentation

inline std::shared_ptr<LSUNDataset> mindspore::dataset::LSUN(const std::string &dataset_dir, const std::string &usage = "all", const std::vector<std::string> &classes = {}, bool decode = false, const std::shared_ptr<Sampler> &sampler = std::make_shared<RandomSampler>(), const std::shared_ptr<DatasetCache> &cache = nullptr)

Function to create a LSUNDataset.

Note

The generated dataset has two columns “image” and “label”.

Parameters

• dataset_dir – [in] Path to the root directory that contains the dataset.

• usage – [in] Dataset splits of LSUN, can be train, valid, test or all (Default=all).

• classes – [in] Classes list to load, such as ‘bedroom’, ‘classroom’ (Default={}, means load all classes).

• decode – [in] Decode the images after reading (Default=false).

• sampler – [in] Shared pointer to a sampler object used to choose samples from the dataset. If sampler is not given, a RandomSampler will be used to randomly iterate the entire dataset (Default = RandomSampler()).

• cache – [in] Tensor cache to use (Default=nullptr, which means no cache is used).

Returns

Shared pointer to the current LSUNDataset.

Example

/* Define dataset path and MindData object */
std::string folder_path = "/path/to/lsun_dataset_directory";
std::shared_ptr<Dataset> ds = LSUN(folder_path, "all");

/* Create iterator to read dataset */
std::shared_ptr<Iterator> iter = ds->CreateIterator();
std::unordered_map<std::string, mindspore::MSTensor> row;
iter->GetNextRow(&row);

/* Note: In LSUNDataset, each data dictionary has keys "image" and "label" */
auto image = row["image"];