Computer Vision System Toolbox Error: Undefined function 'detectSURFFeatures' for input arguments of type 'uint8'.

I'm getting an error running this code. About a month ago it was working. When I type 'ver' in command line I get the following:

MATLAB                                                Version 9.2         (R2017a)
Simulink                                              Version 8.9         (R2017a)
Bioinformatics Toolbox                                Version 4.8         (R2017a)
Communications System Toolbox                         Version 6.4         (R2017a)
Computer Vision System Toolbox                        Version 7.3         (R2017a)
Control System Toolbox                                Version 10.2        (R2017a)
Curve Fitting Toolbox                                 Version 3.5.5       (R2017a)
DSP System Toolbox                                    Version 9.4         (R2017a)
Data Acquisition Toolbox                              Version 3.11        (R2017a)
Image Processing Toolbox                              Version 10.0        (R2017a)
Instrument Control Toolbox                            Version 3.11        (R2017a)
Optimization Toolbox                                  Version 7.6         (R2017a)
Parallel Computing Toolbox                            Version 6.10        (R2017a)
Signal Processing Toolbox                             Version 7.4         (R2017a)
Simscape                                              Version 4.2         (R2017a)
Simscape Multibody                                    Version 5.0         (R2017a)
Simulink Control Design                               Version 4.5         (R2017a)
Stateflow                                             Version 8.9         (R2017a)
Statistics and Machine Learning Toolbox               Version 11.1        (R2017a)
Symbolic Math Toolbox                                 Version 7.2         (R2017a)

      clc 
      clear
      I1 = imread('Image1.jpg');
      I1 = rgb2gray(I1);

      I2 = imread('Image2.jpg');
      I2 = rgb2gray(I2);

      I1_pts = detectSURFFeatures(I1,'MetricThreshold',100,'NumOctaves',5,'NumScaleLevels',3)
      I2_pts = detectSURFFeatures(I2,'MetricThreshold',100,'NumOctaves',5,'NumScaleLevels',3)

      figure(1)
      subplot(1,2,1)
      imshow(I1); 
      hold on
      plot(I1_pts)
      title('Image 1 Surf Features Default Number of Points, Threshold = 200')
      hold off

      subplot(1,2,2)
      imshow(I2); 
      hold on
      plot(I2_pts)
      title('Image 2 Surf Features Default Number of Points, Threshold = 200')
      hold off

      figure(2)
      subplot(1,2,1)
      imshow(I1); 
      hold on
      plot(I1_pts.selectStrongest(20))
      title('Image 1 Surf Features 20 Strongest Points, Threshold = 200')
      hold off

      subplot(1,2,2)
      imshow(I2); 
      hold on
      plot(I2_pts.selectStrongest(20))
      title('Image 2 Surf Features 20 Strongest Points, Threshold = 200')
      hold off

      %Last part
      %Matching Overall Features
      [f1, vpts1] = extractFeatures(I1,I1_pts);
      [f2, vpts2] = extractFeatures(I2,I2_pts);

      indexPairs = matchFeatures(f1,f2);
      matchedPoints1 = vpts1(indexPairs(:,1));
      matchedPoints2 = vpts2(indexPairs(:,2));
      figure(3); 
      showMatchedFeatures(I1,I2,matchedPoints1,matchedPoints2);
      legend('matched points 1','matched points 2');
      title('Matching Overall Features')

      %Matching Top 20 Features
      [f1, vpts1] = extractFeatures(I1,I1_pts.selectStrongest(20));
      [f2, vpts2] = extractFeatures(I2,I2_pts.selectStrongest(20));

      indexPairs = matchFeatures(f1,f2);
      matchedPoints1 = vpts1(indexPairs(:,1));
      matchedPoints2 = vpts2(indexPairs(:,2));
      figure(4); 
      showMatchedFeatures(I1,I2,matchedPoints1,matchedPoints2);
      legend('matched points 1','matched points 2');
      title('Matching top 20 Features')

Answer 1

[Walter Roberson]

You have the product installed, but possibly you have no license for it. What shows up for

which detectSURFFeatures

[Aggie1313]

Thanks. Had no license