Abstract: Disclosed a method for augmenting training data by combining an object and a background with each other. The method includes extracting an object image, wherein the object image is a machine learning target; determining a type of the object image; receiving a background image, wherein the background image comprises a plurality of different background regions; identifying a first background region and a second background region among the plurality of different background regions; and combining the object image with the first background region and the second background region to augment training data, wherein combining the object image with the first background region and the second background region includes randomly positioning an image of a first type object corresponding to the first background region into the first background region, and randomly positioning an image of a second type object corresponding to the second background region into the second background region.