电子与信息学报
電子與信息學報
전자여신식학보
JOURNAL OF ELECTRONICS & INFORMATION TECHNOLOGY
2014年
7期
1619-1624
,共6页
模式识别%道路边缘检测%消失点迭代重估%Gabor滤波器%纹理方向
模式識彆%道路邊緣檢測%消失點迭代重估%Gabor濾波器%紋理方嚮
모식식별%도로변연검측%소실점질대중고%Gabor려파기%문리방향
Pattern recognition%Road edge detection%Vanishing point iteration revaluation%Gabor filter%Texture orientation
传统道路边缘检测算法很少能用于乡村道路。该文提出基于消失点迭代重估的道路边缘检测方法:Gabor滤波器估计像素纹理方向,同时计算对应的置信度;根据纹理方向,由置信度大于阈值的像素投票确定初始消失点;以初始消失点为起点,向下建立一组射线,并计算由颜色差和二倍角正弦函数加权的方向一致率,将最大值对应的射线作为初始道路边缘;交替采样两侧边缘,选取最优消失点,由此得到两条道路边缘。实验测试了不同类型的乡村道路图片,并与经典算法对比。结果表明该方法在乡村道路中具有较高精准度与鲁棒性。
傳統道路邊緣檢測算法很少能用于鄉村道路。該文提齣基于消失點迭代重估的道路邊緣檢測方法:Gabor濾波器估計像素紋理方嚮,同時計算對應的置信度;根據紋理方嚮,由置信度大于閾值的像素投票確定初始消失點;以初始消失點為起點,嚮下建立一組射線,併計算由顏色差和二倍角正絃函數加權的方嚮一緻率,將最大值對應的射線作為初始道路邊緣;交替採樣兩側邊緣,選取最優消失點,由此得到兩條道路邊緣。實驗測試瞭不同類型的鄉村道路圖片,併與經典算法對比。結果錶明該方法在鄉村道路中具有較高精準度與魯棒性。
전통도로변연검측산법흔소능용우향촌도로。해문제출기우소실점질대중고적도로변연검측방법:Gabor려파기고계상소문리방향,동시계산대응적치신도;근거문리방향,유치신도대우역치적상소투표학정초시소실점;이초시소실점위기점,향하건립일조사선,병계산유안색차화이배각정현함수가권적방향일치솔,장최대치대응적사선작위초시도로변연;교체채양량측변연,선취최우소실점,유차득도량조도로변연。실험측시료불동류형적향촌도로도편,병여경전산법대비。결과표명해방법재향촌도로중구유교고정준도여로봉성。
Few traditional road edge detection algorithms can be employed in rural road. An edge detection method based on vanishing point iteration revaluation is presented in this paper. Firstly, the texture orientation of pixel is estimated by Gabor filter, and the corresponding confidence is computed. Secondly, according to the texture orientation, the initial vanishing point is voted by pixels which their confidence are greater than threshold. Thirdly, with the initial vanishing point as starting point, a group of imaginary downward rays are founded, then the orientation consistency ratio weighted by both color difference and double-angle sine function is calculated, and the ray with maximum value is selected as the first road edge. Finally, the optimum vanishing point is given by sampling bilateral edges alternately, and thus two road edges are obtained. A variety of rural road pictures are tested by experiment, and some comparisons are made with the traditional algorithm. The results indicate the method is accurate and robust in rural road.