그림 1. 제안한 알고리듬 순서도 Fig. 1 The proposed algorithm flowchart
그림 2. 직교좌표와 극좌표와의 관계 Fig. 2 The relation between rectangular coordinates and polar coordinates
그림 4. 사람이 없을 때 연속 팽창된 영상 (a) 낮은 카메라 위치 (b) 높은 카메라 위치 (c) 사람 없는 높은 카메라 위치 (d) 사람 있는 높은 카메라 위치 Fig. 4 Cascaded dilated images without person (a) low position camera (b) high position camera (c) high position camera without person (d) high position camera with person
그림 3. 입력영상 (a) 사람 없는 낮은 위치 카메라 영상 (b) 사람 있는 낮은 위치 카메라 영상 (c) 사람 없는 높은 위치 카메라 영상 (d) 사람 있는 높은 위치 카메라 영상 Fig. 3 Input image (a) low position camera image without person (b) low position camera image with person (c) high position camera image without person (d) high position camera image with person
그림 5. 사람이 없을 때 bottom-hat 영상 (a) 낮은 카메라 위치 (b) 높은 카메라 위치 Fig. 5 Bottom-hat transformed images without person (a) low position camera (b) high position camera
그림 6. 이중 문턱화 영상 (a) 낮은 카메라 위치 (b) 높은 카메라 위치 Fig. 6 Double thresholded images without person (a) low position camera (b) high position camera
그림 7. 검출된 경계선 영상 (a) 사람 없는 낮은 카메라 위치 (b) 사람 있는 낮은 카메라 위치 (c) 사람 없는 높은 카메라 위치 (d) 사람 있는 높은 카메라 위치 Fig. 7 The detected boundary images (a) (a) low position camera without person (b) low position camera with person (c) high position camera without person (d) high position camera with person
그림 8. 그림 7(c) 영상에 대한 호프 변환 결과 Fig. 8 Hough transform result for the fig. 7(c)
표 1. 호프 변환에 의해 검출된 경계선의 최대 길이 Table 1. Maximum boundary line length detected by Hough transform
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