저가형 디지털 카메라에 사용되는 광학계의 경우 상대적으로 많은 렌즈 왜곡을 보인다. 이러한 현상은 제조 가격 및 소형 구현시의 제한에 기인하는 것으로 렌즈 재설계를 통한 물리적 보정에는 비용 및 구현시 부피 등의 측면에서 바람직하지 못한 것으로 여겨진다. 본 연구에서는 이러한 렌즈 왜곡을 소프트웨어 측면에서 보정하는 경우에 카메라 캘리브레이션을 통한 렌즈 왜곡 변수를 계산하는 방법 및 계산된 렌즈 왜곡 변수를 이용하여 왜곡된 원영상을 이미지 워핑을 통해 보정하는 방법에 대해 알아본다. 아울러 이러한 방법의 적용 타당성을 살펴보기 위하여 카메라 캘리브레이션을 통해 scale factor ratio 및 이미지 센터와 같은 카메라 상수를 처리하는 방식에 대해 살펴보고자 한다.
KSP Keywords
scale factor
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