Rank: 912 based on 100 downloads (last 30 days) and 4 files submitted
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Mohammad Awrangjeb

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Monash University

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Files Posted by Mohammad View all
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12 Oct 2011 Screenshot A Robust Corner Matching Technique a novel corner matching technique using corners detected by contour-based arcss detector. Author: Mohammad Awrangjeb arcss detector, curvature scalespace, cpda detector, fast cpda detector, matching contourbased..., corner detection 38 0
  • 4.0
4.0 | 1 rating
12 Oct 2011 Screenshot Affine Resilient Curvature Scale-Space Corner Detector Apply the affine-length parameterized curvature to the CSS corner detection technique. Author: Mohammad Awrangjeb corner detection, image analysis, curvature, curvature scalespace, multiscale corner det..., affine resilient 29 0
15 Jul 2010 Screenshot A Fast Corner Detector Based on the Chord-to-Point Distance Accumulation Technique Reference: A Fast Corner Detector Based on the Chord-to-Point Distance Accumulation Technique, IEEE. Author: Mohammad Awrangjeb fastcpda, cpda, corner detection, chordtopoint distance..., contourbased corner d..., fast cpda 13 0
25 May 2009 Screenshot Robust Image Corner Detection based on the Chord-to-Point Distance Accumulation Technique A robust scale-space corner detector that outperforms existing single and multi-scale detectors. Author: Mohammad Awrangjeb corner detection, image analysis, curvature, curvature scalespace, chord scalespace, multiscale detectors 20 6
  • 4.0
4.0 | 5 ratings
Comments and Ratings by Mohammad View all
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27 Apr 2009 Robust Image Corner Detection based on the Chord-to-Point Distance Accumulation Technique A robust scale-space corner detector that outperforms existing single and multi-scale detectors. Author: Mohammad Awrangjeb

Hi Mike,
Thanks for your enquiries.

1. The absolute CPDA curvature values are calculated before normalization. In the previous code I forgot to take absolute value before normalization. Absolute function will protect some normalized values to become infinite (when maxium positive curvature value is 0) or to become greater than 1 (when maximum curvature value is negative). Please apply abs() function on line 118: C3(j,1:L) = abs(accumulate_chord_distance(xs,ys,chordLen,L,curve_mode(i,:)));

Note: updated code will be uploaded soon.

2. This is just an assumption that the CPDA curvature value at a T-junction point is 10. It is just to distinguish T-junctions from actual corner locations in any later applications. This value in fact cannot be used to compare with other corners during matching.

You may set any other value for your convenience.

19 Jan 2009 Robust Image Corner Detection based on the Chord-to-Point Distance Accumulation Technique A robust scale-space corner detector that outperforms existing single and multi-scale detectors. Author: Mohammad Awrangjeb

19 Jan 2009 Robust Image Corner Detection based on the Chord-to-Point Distance Accumulation Technique A robust scale-space corner detector that outperforms existing single and multi-scale detectors. Author: Mohammad Awrangjeb

19 Jan 2009 Robust Image Corner Detection based on the Chord-to-Point Distance Accumulation Technique A robust scale-space corner detector that outperforms existing single and multi-scale detectors. Author: Mohammad Awrangjeb

Sorry, own rating! it happended accidentally. I could not removed afterwards! I did re-rate to make the previous rating back!

19 Jan 2009 Robust Image Corner Detection based on the Chord-to-Point Distance Accumulation Technique A robust scale-space corner detector that outperforms existing single and multi-scale detectors. Author: Mohammad Awrangjeb

I fixed and updated the bug today. Mathworks will show the change soon.

Bug fixing: add/update the following two lines

left = smoothed_curve(extremum(1):-1:1,:);
right = smoothed_curve(end:-1:extremum(end),:);

before the follwoing line

ang=curve_tangent([left;right],extremum(1));

Thanks to Natalia and Piao Lin.

Comments and Ratings on Mohammad's Files View all
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17 Oct 2011 A Robust Corner Matching Technique a novel corner matching technique using corners detected by contour-based arcss detector. Author: Mohammad Awrangjeb Chong, Wan

27 Apr 2009 Robust Image Corner Detection based on the Chord-to-Point Distance Accumulation Technique A robust scale-space corner detector that outperforms existing single and multi-scale detectors. Author: Mohammad Awrangjeb Awrangjeb, Mohammad

Hi Mike,
Thanks for your enquiries.

1. The absolute CPDA curvature values are calculated before normalization. In the previous code I forgot to take absolute value before normalization. Absolute function will protect some normalized values to become infinite (when maxium positive curvature value is 0) or to become greater than 1 (when maximum curvature value is negative). Please apply abs() function on line 118: C3(j,1:L) = abs(accumulate_chord_distance(xs,ys,chordLen,L,curve_mode(i,:)));

Note: updated code will be uploaded soon.

2. This is just an assumption that the CPDA curvature value at a T-junction point is 10. It is just to distinguish T-junctions from actual corner locations in any later applications. This value in fact cannot be used to compare with other corners during matching.

You may set any other value for your convenience.

26 Apr 2009 Robust Image Corner Detection based on the Chord-to-Point Distance Accumulation Technique A robust scale-space corner detector that outperforms existing single and multi-scale detectors. Author: Mohammad Awrangjeb Mike

Hi, great program

I have a couple of question.
1. Are the curvature values normalized or absolution, as I have encountered values from very small to very large (up to 10^17)?

2. some curvature values are just 10's (exactly 10). I've looked through the code, it seems that 10 is appended to the curvature matrix on some occasions. Could you tell me what is the criteria?

19 Jan 2009 Robust Image Corner Detection based on the Chord-to-Point Distance Accumulation Technique A robust scale-space corner detector that outperforms existing single and multi-scale detectors. Author: Mohammad Awrangjeb Awrangjeb, Mohammad

19 Jan 2009 Robust Image Corner Detection based on the Chord-to-Point Distance Accumulation Technique A robust scale-space corner detector that outperforms existing single and multi-scale detectors. Author: Mohammad Awrangjeb Awrangjeb, Mohammad

Top Tags Applied by Mohammad
corner detection, curvature, image analysis, curvature scalespace, obtuse corner
Files Tagged by Mohammad View all
Updated   File Tags Downloads
(last 30 days)
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12 Oct 2011 Screenshot A Robust Corner Matching Technique a novel corner matching technique using corners detected by contour-based arcss detector. Author: Mohammad Awrangjeb arcss detector, curvature scalespace, cpda detector, fast cpda detector, matching contourbased..., corner detection 38 0
  • 4.0
4.0 | 1 rating
12 Oct 2011 Screenshot Affine Resilient Curvature Scale-Space Corner Detector Apply the affine-length parameterized curvature to the CSS corner detection technique. Author: Mohammad Awrangjeb corner detection, image analysis, curvature, curvature scalespace, multiscale corner det..., affine resilient 29 0
15 Jul 2010 Screenshot A Fast Corner Detector Based on the Chord-to-Point Distance Accumulation Technique Reference: A Fast Corner Detector Based on the Chord-to-Point Distance Accumulation Technique, IEEE. Author: Mohammad Awrangjeb fastcpda, cpda, corner detection, chordtopoint distance..., contourbased corner d..., fast cpda 13 0
25 May 2009 Screenshot Robust Image Corner Detection based on the Chord-to-Point Distance Accumulation Technique A robust scale-space corner detector that outperforms existing single and multi-scale detectors. Author: Mohammad Awrangjeb corner detection, image analysis, curvature, curvature scalespace, chord scalespace, multiscale detectors 20 6
  • 4.0
4.0 | 5 ratings

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