西安电子科技大学学报(自然科学版)
西安電子科技大學學報(自然科學版)
서안전자과기대학학보(자연과학판)
JOURNAL OF XIDIAN UNIVERSITY(NATURAL SCIENCE)
2014年
6期
160-166
,共7页
余旺盛%侯志强%田孝华%查宇飞
餘旺盛%侯誌彊%田孝華%查宇飛
여왕성%후지강%전효화%사우비
视觉跟踪%局部特征%联合匹配%平衡指派%非刚体目标
視覺跟蹤%跼部特徵%聯閤匹配%平衡指派%非剛體目標
시각근종%국부특정%연합필배%평형지파%비강체목표
visual tracking%local feature%joint matching%balance assignment%non-rigid object
针对视频序列中非刚体目标的跟踪问题,提出了基于局部特征联合匹配的快速跟踪算法。算法将基于关键点的特征匹配问题转化为求解平衡指派的最优化问题,进而依据整体匹配最优的原则实现特征的联合匹配。跟踪过程为:首先分别提取目标模板和当前搜索区域的局部关键点并进行特征描述;然后依据联合匹配策略确定目标模板关键点在输入帧图像中的匹配结果;最后依据匹配结果确定目标在输入帧图像中的位置和尺度。实验结果表明,该算法对目标的非刚性形变具有较强的鲁棒性,能够适应复杂的背景变化并获得稳定的跟踪结果。
針對視頻序列中非剛體目標的跟蹤問題,提齣瞭基于跼部特徵聯閤匹配的快速跟蹤算法。算法將基于關鍵點的特徵匹配問題轉化為求解平衡指派的最優化問題,進而依據整體匹配最優的原則實現特徵的聯閤匹配。跟蹤過程為:首先分彆提取目標模闆和噹前搜索區域的跼部關鍵點併進行特徵描述;然後依據聯閤匹配策略確定目標模闆關鍵點在輸入幀圖像中的匹配結果;最後依據匹配結果確定目標在輸入幀圖像中的位置和呎度。實驗結果錶明,該算法對目標的非剛性形變具有較彊的魯棒性,能夠適應複雜的揹景變化併穫得穩定的跟蹤結果。
침대시빈서렬중비강체목표적근종문제,제출료기우국부특정연합필배적쾌속근종산법。산법장기우관건점적특정필배문제전화위구해평형지파적최우화문제,진이의거정체필배최우적원칙실현특정적연합필배。근종과정위:수선분별제취목표모판화당전수색구역적국부관건점병진행특정묘술;연후의거연합필배책략학정목표모판관건점재수입정도상중적필배결과;최후의거필배결과학정목표재수입정도상중적위치화척도。실험결과표명,해산법대목표적비강성형변구유교강적로봉성,능구괄응복잡적배경변화병획득은정적근종결과。
To the problem of non-rigid obj ect tracking in video sequence,an efficient tracking algorithm based on joint matching of local features is proposed.The feature matching problem based on key points is translated into the optimization problem of balance assignment,and completed via joint matching of features under the maximization of holistic similarity.The tracking process is as follows.Firstly,local key points of the obj ect template and current searching area are detected and described using the information on their neighborhoods.Then,the key points are marched via the proposed joint matching strategy,and the right matching pairs are picked out. Finally, the obj ect’s location and size are calculated according to the matching results,and the tracking result of the current frame is outputted.Experimental results indicate that the proposed algorithm is robust to obj ect”s non-rigid deformation,and can cope with the complex background change to obtain a stable tracking result.