The article introduces data approximation as a method to enhance the efficiency of training computer vision and machine learning models by simplifying large datasets into more manageable forms. This technique is crucial when dealing with large-scale optimization problems and datasets that are difficult to store and process, such as those used in applications like autonomous vehicles, remote sensing, and traffic monitoring. Data approximation can be achieved through methods like thresholding, low-rank approximation, non-negative matrix factorization, and feature engineering, each helping to reduce computational costs while maintaining model performance. Despite the benefits, data approximation can entail some loss of original data information, requiring robust optimization techniques to manage approximation errors effectively. The article emphasizes the importance of choosing the right approximation method for specific scenarios to ensure efficient and reliable model performance.