Rank: 1254 based on 79 downloads (last 30 days) and 1 file submitted

Mohammad Awrangjeb

E-mail: Contact Author

Personal Profile:
Professional Interests:

Files
Watch Lists

Files Posted by Mohammad					1 - 1 of 1
Updated		File	Tags	Downloads (last 30 days)	Comments	Rating
25 May 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	corner detection, chord scalespace, round corner, curvature scalespace, obtuse corner, multiscale detectors	79	6	4.0 4.0 \| 5 ratings

Comments and Ratings by Mohammad		View all 1 - 5 of 5
Updated	File	Comments	Rating
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 1 - 5 of 8
Updated	File	Comment by	Comments	Rating
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
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	Sorry, own rating! it happended accidentally. I could not removed afterwards! I did re-rate to make the previous rating back!

Top Tags Applied by Mohammad	1 - 5 of 10
chord scalespace, corner detection, curvature, curvature scalespace, false corner

Files Tagged by Mohammad					1 - 1 of 1
Updated		File	Tags	Downloads (last 30 days)	Comments	Rating
25 May 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	corner detection, chord scalespace, round corner, curvature scalespace, obtuse corner, multiscale detectors	79	6	4.0 4.0 \| 5 ratings

MATLAB Central Terms of Use

NOTICE: Any content you submit to MATLAB Central, including personal information, is not subject to the protections which may be afforded information collected under other sections of The MathWorks, Inc. Web site. You are entirely responsible for all content that you upload, post, e-mail, transmit or otherwise make available via MATLAB Central. The MathWorks does not control the content posted by visitors to MATLAB Central and, does not guarantee the accuracy, integrity, or quality of such content. Under no circumstances will The MathWorks be liable in any way for any content not authored by The MathWorks, or any loss or damage of any kind incurred as a result of the use of any content posted, e-mailed, transmitted or otherwise made available via MATLAB Central. Read the complete Terms prior to use.