测绘学报
測繪學報
측회학보
ACTA GEODAETICA ET CARTOGRAPHICA SINICA
2015年
4期
414-421
,共8页
肖雄武%郭丙轩%李德仁%赵霞%江万寿%胡翰%张春森
肖雄武%郭丙軒%李德仁%趙霞%江萬壽%鬍翰%張春森
초웅무%곽병헌%리덕인%조하%강만수%호한%장춘삼
倾斜影像匹配%仿射不变特征(AIF)%ASIFT%逆仿射变换%匹配约束
傾斜影像匹配%倣射不變特徵(AIF)%ASIFT%逆倣射變換%匹配約束
경사영상필배%방사불변특정(AIF)%ASIFT%역방사변환%필배약속
oblique images matching%affine invariant feature(AIF)%ASIFT%inverse affine transform%matc-hing constrains
提出了一种较为快速且具有仿射不变性的倾斜影像匹配方法.通过估算影像的相机轴定向参数计算出初始仿射矩阵,通过逆仿射变换得到纠正影像,对纠正影像进行 SIFT 匹配.首先利用比值提纯法(NNDR)、归一化互相关(NCC)测度约束和左右一致性检验得到粗匹配点对,由粗匹配点对利用RANSAC方法计算出基本矩阵F 和单应矩阵H.匹配时,匹配策略采用最邻近匹配,并利用极线约束、单应矩阵约束、NCC测度约束和主方向差值一致性约束剔除误匹配.通过对三组典型的倾斜影像数据进行试验,试验表明该方法匹配准确率高,匹配点对较为密集、均匀,且效率较高.
提齣瞭一種較為快速且具有倣射不變性的傾斜影像匹配方法.通過估算影像的相機軸定嚮參數計算齣初始倣射矩陣,通過逆倣射變換得到糾正影像,對糾正影像進行 SIFT 匹配.首先利用比值提純法(NNDR)、歸一化互相關(NCC)測度約束和左右一緻性檢驗得到粗匹配點對,由粗匹配點對利用RANSAC方法計算齣基本矩陣F 和單應矩陣H.匹配時,匹配策略採用最鄰近匹配,併利用極線約束、單應矩陣約束、NCC測度約束和主方嚮差值一緻性約束剔除誤匹配.通過對三組典型的傾斜影像數據進行試驗,試驗錶明該方法匹配準確率高,匹配點對較為密集、均勻,且效率較高.
제출료일충교위쾌속차구유방사불변성적경사영상필배방법.통과고산영상적상궤축정향삼수계산출초시방사구진,통과역방사변환득도규정영상,대규정영상진행 SIFT 필배.수선이용비치제순법(NNDR)、귀일화호상관(NCC)측도약속화좌우일치성검험득도조필배점대,유조필배점대이용RANSAC방법계산출기본구진F 화단응구진H.필배시,필배책략채용최린근필배,병이용겁선약속、단응구진약속、NCC측도약속화주방향차치일치성약속척제오필배.통과대삼조전형적경사영상수거진행시험,시험표명해방법필배준학솔고,필배점대교위밀집、균균,차효솔교고.
This paper proposed a quick,affine invariance matching method for oblique images.It calculated the initial affine matrix by making full use of the two estimated camera axis orientation parameters of an oblique image,then recovered the oblique image to a rectified image by doing the inverse affine transform,and left over by the SIFT method.We used the nearest neighbor distance ratio(NNDR), normalized cross correlation(NCC)measure constraints and consistency check to get the coarse matches, then used RANSAC method to calculate the fundamental matrix and the homography matrix.And we got the matches that they were interior points when calculating the homography matrix,then calculated the average value of the matches’principal direction differences.During the matching process,we got the initial matching features by the nearest neighbor (NN)matching strategy,then used the epipolar constrains,homography constrains,NCC measure constrains and consistency check of the initial matches’ principal direction differences with the calculated average value of the interior matches’principal direction differences to eliminate false matches.Experiments conducted on three pairs of typical oblique images demonstrate that our method takes about the same time as SIFT to match a pair of oblique images with a plenty of corresponding points distributed evenly and an extremely low mismatching rate.