Method of localizing heads of people in crowd and computer program recorded on recording medium to execute the same

A computer program connected to a computing device comprising:

• a memory, a transceiver, and a processor configured to process instructions residing in the memory, the computer program causing the processor to execute:
• training an artificial intelligence (AI) model;
• receiving an image captured by a camera requiring head localization;
• and
• detecting center coordinates of a head of at least one person from the received image based on the artificial intelligence model,
• wherein the training includes matching at least one anchor point for a center of a grid formed by dividing a training image into equal-sized areas to a plurality of ground truth points for a center of a head of a person appearing in the training image and performing label assignment to train the artificial intelligence model, non-replacement matching being performed in ascending order of a difference in probability of the head being present at a predicted point predicted from the artificial intelligence model based on a distance IoU (DIoU) loss value between the at least one anchor point and the plurality of ground truth points, and the anchor point.