Data generation apparatus and method thereof

Abstract

A data generation apparatus includes a data input unit that inputs an initial dataset, a data preprocessing unit that normalizes the initial dataset and splits the normalized initial dataset into a initial training dataset and a initial test dataset, a learning model generation unit that trains a first machine learning model using the initial training dataset and optimizes a hyperparameter of the first machine learning model using a predetermined number of cross-validations, thereby generating a first learning model, a validation unit that validates the generated first learning model using the initial test dataset, a semi-synthetic data generation unit that selects and generates a new parameter within a boundary space defined by the initial dataset and performs data prediction using the first learning model based on the new parameter to generate a semi-synthetized dataset, and a database that stores the initial dataset and the semi-synthetized dataset.