Light source estimation method in vision-based augmented reality game

A technology disclosed in the present specification is a method of estimating a light source through reflected light using a monocular camera and an IMU sensor in a portable device environment such as a smartphone, capable of estimating the light source with high accuracy by generating a shadow of a virtual object and comparing the same with a shadow of a real object, thereby having a relatively low amount of computation and not being dependent on a special camera. The method of estimating a light source of the present invention includes: a step of recognizing a plane; a step of obtaining a position of a first angle and a center point on the plane; a step of obtaining a second angle; and a step of estimating coordinates of the light source. 본 명세서에 개시된 기술은 스마트폰 등 휴대용 기기 환경에서 단안 카메라와 IMU 센서를 사용하여 반사광을 통해 광원을 추정하는 방법으로서, 가상객체의 그림자를 생성하고 실제 물체의 그림자와 비교하여 높은 정확도로 광원을 추정할 수 있고, 비교적 낮은 연산량과 특수 카메라에 종속되지 않는 이점을 가진다.