surf的matlab算法实现

入门好帮手，基于sift改编的surf算法。速度比surf快，可以连接硬件实验，有matlab的接口调用方便。

% Example 2 Corresponding points
% Load images
  I1=imread（‘TestImages/6.jpg‘）;
  I2=imread（‘TestImages/8.jpg‘）;
% 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       1201  2012-07-08 02:34  surf\example2.m

     文件       1768  2012-07-08 02:33  surf\example3.asv

     文件       1768  2012-07-08 02:35  surf\example3.m

     文件     239755  2010-09-07 00:22  surf\lena1.png

     文件     211716  2010-09-07 00:22  surf\lena2.png

     文件       1335  2010-09-06 19:21  surf\license.txt

     文件       3778  2010-09-07 00:27  surf\OpenSurf.m

     文件     722555  2012-03-26 00:54  surf\OpenSURF_version1c.zip

     文件        603  2010-07-27 04:56  surf\SubFunctions\FastHessian_BuildDerivative.m

     文件       1699  2010-07-30 00:10  surf\SubFunctions\FastHessian_buildResponselayer.m

     文件       1877  2010-07-21 00:37  surf\SubFunctions\FastHessian_buildResponseMap.m

     文件       2353  2010-07-30 23:43  surf\SubFunctions\FastHessian_getIpoints.m

     文件        455  2010-07-27 04:56  surf\SubFunctions\FastHessian_getLaplacian.m

     文件        450  2010-07-27 04:56  surf\SubFunctions\FastHessian_getResponse.m

     文件       2478  2010-07-30 23:02  surf\SubFunctions\FastHessian_interpolateExtremum.m

     文件       1680  2010-07-30 22:56  surf\SubFunctions\FastHessian_isExtremum.m

     文件        738  2010-07-30 04:32  surf\SubFunctions\FastHessian_Responselayer.m

     文件        791  2010-07-29 22:58  surf\SubFunctions\IntegralImage_BoxIntegral.m

     文件        494  2010-07-30 04:32  surf\SubFunctions\IntegralImage_HaarX.m

     文件        556  2010-07-30 04:37  surf\SubFunctions\IntegralImage_HaarY.m

     文件        796  2010-07-29 22:42  surf\SubFunctions\IntegralImage_IntegralImage.m

     文件       1089  2010-07-30 23:39  surf\SubFunctions\PaintSURF.m

     文件       1554  2010-07-31 00:39  surf\SubFunctions\SurfDescriptor_DecribeInterestPoints.m

     文件       3636  2010-07-31 00:40  surf\SubFunctions\SurfDescriptor_GetDescriptor.m

     文件       2921  2010-07-31 00:07  surf\SubFunctions\SurfDescriptor_GetOrientation.m

     文件       1443  2012-07-22 13:16  surf\surf1.fig

     文件       5010  2012-07-22 13:18  surf\surf1.m

     文件     123228  2010-07-27 01:06  surf\testc1.png

     文件     122063  2010-07-27 01:06  surf\testc2.png

     文件     111891  2012-05-15 14:01  surf\TestImages\10.jpg

............此处省略39个文件信息