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Harris Corner Detector

3.7 | 30 ratings Rate this file 68 Downloads (last 30 days) File Size: 344 KB File ID: #9272 Version: 1.0
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Harris Corner Detector


Ali Ganoun (view profile)


06 Dec 2005 (Updated )

The code calculates and display the Harris Feature Points.

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The code calculates the Harris Feature Points. When u execute the code, the test image file opened and u have to select by the mouse the region where u want to find the Harris points,
the code will print out and display the feature points in the selected region.

You can select the number of FPs by changing the variables max_N & min_N

MATLAB release MATLAB 7.1.0 (R14SP3)
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Comments and Ratings (38)
12 Dec 2016 Hashim Shafiq

good work

13 Nov 2016 xiaoyafeng

13 Nov 2016 xiaoyafeng

13 Jun 2016 liu wang

27 Apr 2016 Mildred Sun

thank you very much

Comment only
22 May 2015 xu xiaofeng

very nice

25 Jul 2014 ankith reddy

hello ali,
i have two questions to ask .
1) can you explain why did you choose two values from variable 'point1' and 'point2'instead of four.
2) why are you applying convolution two times?
3) finally, can i use other filter instead of gaussian?

early reply would be appreciable.

04 May 2014 paula

paula (view profile)

Hi! Your work is great! I have a doubt: What is the Imag.mat file used for??

Thank you!! :)

08 Aug 2013 anibal

anibal (view profile)

muchas gracias

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26 Apr 2013 Rehab

Rehab (view profile)

27 Feb 2013 Si

Si (view profile)

24 Feb 2013 Chandra Prakash

24 Feb 2013 Chandra Prakash

Thanks. Its Working. :)

Comment only
28 Apr 2012 ZHEFENG chen

great thanks

23 Dec 2011 Qiu

Qiu (view profile)

good, 3ks

Comment only
05 Jun 2011 Fatma Gargouri


17 Aug 2010 Peter Bone

Peter Bone (view profile)

Code works well but has some negative points that need to be corrected.
- Code works on non-standard image format (double in range 0 to 255).
- There is some confusion between row and column indexing variable names.
- There is no boundary checking for cmin,cmax,rmin,rmax, so it gives an error if you try to select an area near the edge of the image.
- Poor commenting and description.
- Would be better in the form of a function with separate implementation example.

30 Jun 2010 Indika Wickramasekara

i want to implement the below algorithm. please help me.

1. Convert image to a gray level image
2. Compute the M matrix mentioned above for all points in the
3. Apply the Gaussian filter to the output image of stage 2
4. Compute R for the output image of stage 3
5. Find the maximums in 3 by 3 neighborhoods in the output image of stage 4
6. Find the points in the output image of stage 5 who’s R value is grater than a predefined Threshold value (Rmin)

13 May 2010 Ruben Ferrer

How can change the image? i.e. How can create a .mat image from .jpg? thanks

Comment only
03 Mar 2010 Dja

Dja (view profile)

Thanks for sharing but I'm sorry it looks a bit too dirty to me. No comments, some redundancies and no genericity...

02 Nov 2009 Raymond Cheng

Thanks for your sharing.

08 Jul 2009 george

george (view profile)

any help please !!!!

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06 Jul 2009 george

george (view profile)

thanks for this code, iam trying to implement the system using the help of harris in fuzzy, but i have a question bout the
energy . is "R=R11 " considered to be the energy of the image .
if it is , i have another question when i applied the code to different images i get energy of corner like 50 or 60 and on another image i get values like 500 or 600,

thanks in advance

19 Mar 2009 binu mol

i would like to have the idl code of Harris-Corner detector for my project work.please help me

Comment only
19 Nov 2008 Kedar Patwardhan

pretty good results on my test images, and works fast.

27 Jul 2008 Said Musa Al Cherkessi

Wabjew day'es

15 Jul 2008 Bob Zhang


24 Feb 2008 KK Rai

01 Feb 2008 marco gialletto

grande! evribadi

05 Dec 2007 Kelly Santos

Good, some changes and its works very well for any input image.

21 Nov 2007 Mustafa M

I think it is great for my application. Sometimes we need to find the points as region of interest only and not in the whole image. Thank you indeed.

27 Jun 2007 harris detector

it's working fine.. with litle changes you can make it work for every image you want(not the default one) and make it scan the whole image rather than just the selected window

28 May 2007 Alex Bewley

07 Oct 2006 kamal R

what is the advantage if u use mouse to select feature points.The better thing is to use matlab toolbox itself.If u have automated it send me a copy

03 Apr 2006 Harris Decttor

It sucks

27 Mar 2006 Adlin Sheeba

I need the coding for the matlab data file Imag.
For my own bmp image I want to find the harris corner. Plz help me.

Comment only
06 Mar 2006 hedi hedi

16 Feb 2006 paul martin


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