CODEWITHSUNDEEP
matlab
user3476225
user3476225

Reputation: 240

MATLAB:Undefined function 'detectHarrisFeatures' for input arguments of type 'double'

I have installed MATLAB2015a in my linux system . I have installed almost all packages in my system while installation of MATLAB . While running the below code I am getting a straneg error .Can any one help me into this : I have required tool box :

>> ver

-----------------------------------------------------------------------------------------------------
MATLAB Version: 8.5.0.197613 (R2015a)
MATLAB License Number: 88888
Operating System: Linux 3.13.0-53-generic #89~precise1-Ubuntu SMP Wed May 20 17:42:16 UTC 2015 x86_64
Java Version: Java 1.7.0_60-b19 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
-----------------------------------------------------------------------------------------------------
MATLAB                                                Version 8.5        (R2015a)
Computer Vision System Toolbox                        Version 6.2        (R2015a)
Image Acquisition Toolbox                             Version 4.9        (R2015a)
Image Processing Toolbox                              Version 9.2        (R2015a)
>>

Commands:

I = checkerboard;
corners = detectHarrisFeatures(I);
imshow(I); hold on;
plot(corners.selectStrongest(50));

Error: Undefined function 'detectHarrisFeatures' for input arguments of type 'double'.

Upvotes: 1

Views: 1623

Answers (1)

Borzi
Borzi

Reputation: 577

I think you need to use a grayscale to use the detectHarrisFeatures function. So the correct code would be:

I = checkerboard;
I_grayscale = rgb2gray(I);
corners = detectHarrisFeatures(I_grayscale);
imshow(I); hold on;
plot(corners.selectStrongest(50));

Upvotes: 0

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