surf算法-matlab版

SURF算法是继SIFT算法后的又一个稳定快速的特征提取算法，它除了具有SIFT算法的稳定性外，最突出的优点是算法速度快，实时性较强。

% Example 2 Corresponding points
% Load images
  I1=imread（‘TestImages/testc1.png‘）;
  I2=imread（‘TestImages/testc2.png‘）;
% Get the Key Points
  Options.upright=true;
  Options.tresh=0.0001;
  Ipts1=OpenSurf（I1Options）;
  Ipts2=OpenSurf（I2Options）;
% Put the landmark descriptors in a matrix
  D1 = reshape（[Ipts1.descriptor]64[]）; 
  D2 = reshape（[Ipts2.descriptor]64[]）; 
% Find the best matches
  err=zeros（1length（Ipts1））;
  cor1=1:length（Ipts1）; 
  cor2=zeros（1length（Ipts1））;
  for i=1:length（Ipts1）
      distance=sum（（D2-repmat（D1（:i）[1 length（Ipts2）]））.^21）;
      [err（i）cor2（i）]=min（distance）;
  end
% Sort matches on vector distance
  [err ind]=sort（err）; 
  cor1=cor1（ind）; 
  cor2=cor2（ind）;
% Show both images
  I = zeros（[size（I11） size（I12）*2 size（I13）]）;
  I（:1:size（I12）:）=I1; I（:size（I12）+1:size（I12）+size（I22）:）=I2;
  figure imshow（I/255）; hold on;
% Show the best matches
  for i=1:30
      c=rand（13）;
      plot（[Ipts1（cor1（i））.x Ipts2（cor2（i））.x+size（I12）][Ipts1（cor1（i））.y Ipts2（cor2（i））.y]‘-‘‘Color‘c）
      plot（[Ipts1（cor1（i））.x Ipts2（cor2（i））.x+size（I12）][Ipts1（cor1（i））.y Ipts2（cor2（i））.y]‘o‘‘Color‘c）
  end

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件       1211  2010-09-06 12:26  OpenSURF\example2.m

     文件       1912  2014-07-08 09:00  OpenSURF\example3.m

     文件       1335  2010-09-06 07:21  OpenSURF\license.txt

     文件       3778  2010-09-06 12:27  OpenSURF\OpenSurf.m

     文件     641272  2010-11-08 17:14  OpenSURF\opensurf.png

     文件        603  2010-07-26 16:56  OpenSURF\SubFunctions\FastHessian_BuildDerivative.m

     文件       1699  2010-07-29 12:10  OpenSURF\SubFunctions\FastHessian_buildResponselayer.m

     文件       1877  2010-07-20 12:37  OpenSURF\SubFunctions\FastHessian_buildResponseMap.m

     文件       2353  2010-07-30 11:43  OpenSURF\SubFunctions\FastHessian_getIpoints.m

     文件        455  2010-07-26 16:56  OpenSURF\SubFunctions\FastHessian_getLaplacian.m

     文件        450  2010-07-26 16:56  OpenSURF\SubFunctions\FastHessian_getResponse.m

     文件       2478  2010-07-30 11:02  OpenSURF\SubFunctions\FastHessian_interpolateExtremum.m

     文件       1680  2010-07-30 10:56  OpenSURF\SubFunctions\FastHessian_isExtremum.m

     文件        738  2010-07-29 16:32  OpenSURF\SubFunctions\FastHessian_Responselayer.m

     文件        791  2010-07-29 10:58  OpenSURF\SubFunctions\IntegralImage_BoxIntegral.m

     文件        494  2010-07-29 16:32  OpenSURF\SubFunctions\IntegralImage_HaarX.m

     文件        556  2010-07-29 16:37  OpenSURF\SubFunctions\IntegralImage_HaarY.m

     文件        796  2010-07-29 10:42  OpenSURF\SubFunctions\IntegralImage_IntegralImage.m

     文件       1089  2010-07-30 11:39  OpenSURF\SubFunctions\PaintSURF.m

     文件       1554  2010-07-30 12:39  OpenSURF\SubFunctions\SurfDescriptor_DecribeInterestPoints.m

     文件       3636  2010-07-30 12:40  OpenSURF\SubFunctions\SurfDescriptor_GetDescriptor.m

     文件       2921  2010-07-30 12:07  OpenSURF\SubFunctions\SurfDescriptor_GetOrientation.m

     文件     239755  2010-09-06 12:22  OpenSURF\TestImages\lena1.png

     文件     211716  2010-09-06 12:22  OpenSURF\TestImages\lena2.png

     文件       5296  2010-07-19 17:38  OpenSURF\TestImages\test.png

     文件     123228  2010-07-26 13:06  OpenSURF\TestImages\testc1.png

     文件     122063  2010-07-26 13:06  OpenSURF\TestImages\testc2.png

     文件       9721  2010-09-06 13:04  OpenSURF\WarpFunctions\affine_warp.m

     目录          0  2010-09-06 10:35  OpenSURF\SubFunctions

     目录          0  2010-09-06 12:42  OpenSURF\TestImages

............此处省略5个文件信息