Feature point matching is a key step of image registration, object recognition and many other computer vision applications.By using the proposed structural distance between feature point sets as the matching similarity,we are able to match the spatial structures of feature points in different images....
图像配准是所有图像分析任务中最为关键和基础的步骤,是图像拼接、图像重建、目标识别等应用的前提。对于常用的基于特征的图像配准方法,其关键在于如何对特征进行有效的提取,尺度不变特征(Scale Invariant Feature Transform,SIFT)算法能够为我们所提供需要的不变特征。SIFT 特征具有旋转、光照、仿射和尺度等不变性,SIFT 算...
也就是说一个相机拍出的两张照片上的对应特征点可以经过透视变换互相转换,即xi yi是其中一张照片的特征点,xi’yi'是另一张图片的对应特征点(不一定存在,只有检测出存在的时候,求解单应性才有意义,这就体现了第四讲feature提取的重要意义)。 homography方程 homography矩阵 这里由归一化齐次坐标知,s即方程中的h...
Imagefeaturepointdetectionisakeytechniquein thedomainofimagematching,targetsidentificationandmotionestimation. 图像特征点检测是图像匹配、目标识别以及运动估计等领域的一项关键技术。 www3.chkd.cnki.net 7. Thispapergavearecognitionalgorithmusingimprovedphase-basedcorrelation'imagematching. ...
网格做warp得到的新的feature point坐标为未知, 网格做warp后feature point坐标点为测量值计算最小误差。同理反过来求解 图像变形后的网格。由于优化的是网格顶点(matching point),因此,将特征点表达成其所有网格的四个顶点的双边线性组合: 。 其中, 代表各自所占的面积比重,例如:p越靠近 ...
% 2. Detect feature points in both images. % 3. Extract fixed-size patches around every keypoint in both images, and % form descriptors simply by "flattening" the pixel values in each patch to % one-dimensional vectors. % 4. Compute distances between every descriptor in one image and eve...
ZHANG Yuan,GAO Guandong,JIA Kebin.A fast algorithm for cylindrical panoramic image based on feature point matching [J].Journal of Image and Graphics,2009,14 (6):1188- 1193 (in Chinese). [张媛,高冠东,贾克斌.运用特征点匹 配的柱面 全景图像快速拼接算法 [J].中国图象图形学报, 2009,14 (6):...
Image Mosaics Algorithm Based on SIFT Feature Point Matching and Transformation Parameters Automatically Recognizing A mosaic algorithm of different scale image registration and adaptive is proposed in this thesis, against to the large amount of calculation and poor robus... P Qiu,Y Liang,H Rong - ...
关键词:图像匹配;特征提取;尺度不变特征变换;SIFT特征;置信度 中图分类号:TP39I.4文献标识码:A featureextractionand technolo Image matching Xiao—hai YANGXiao-min,WUWei,QINGLin—bo,HUAHHa,HE 610064,China) (CollegeofElectronicsInformationUniversity,Chengdu Engineering,Sichuan Abstract:Withtheaimto the and...
the feature points were detected by Harris detector,then the facet model was used to approximate locally the image intensity function,and the rotation-invariability of the feature point was extracted,finally,the transformation(translation and rotation) was obtained by matching feature points.Results have...