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Global Context Descriptors for SURF and MSER Feature Descriptors
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Gail Carmichael
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Presentation slides for talk given at Computer Robot Vision 2010 in Ottawa, Canada.
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Global Context Descriptors for SURF and MSER Feature Descriptors
1.
Global Context Descriptors
for SURF and MSER Feature Descriptors Gail Carmichael Robert Laganière Prosenjit Bose
2.
Gail Carmichael PhD
Student, School of Computer Science http://www.gailcarmichael.com
3.
Stuff I care
about... Learning
4.
Stuff I care
about... Augmented Reality
5.
Stuff I care
about... Matching Panoramas and Photographs
6.
SIFT with Global
Context Mortensen, Deng, Shapiro (2005)
7.
SIFT with Global
Context Mortensen, Deng, Shapiro (2005)
8.
SIFT with Global
Context Mortensen, Deng, Shapiro (2005)
9.
Global, But More
Local Li and Ma (2009)
10.
Global, But More
Local Li and Ma (2009)
11.
Global Context for
SURF Pretty much the same as SIFT
12.
Global Context for
SURF 1. Find SURF points with SURFmex
13.
Global Context for
SURF 2. Find nearby features for each SURF point
14.
Global Context for
SURF 3. Put curvature values in log-polar graph.
15.
Global Context for
SURF 4. Append values of bins to get Global Context.
16.
Global Context for
MSER A little different from SIFT/SURF...
17.
Global Context for
MSER 1. Detect Maximally Stable Extremal Regions (MSERs) with VLFeat
18.
Global Context for
MSER 2a. Create shape patches (Forssén and Lowe).
19.
Global Context for
MSER 2b. Create texture patches (Forssénand Lowe).
20.
Global Context for
MSER Measurement region? Points to measure? Multiple of bounding ellipse. All values around MSER.
21.
Global Context for
MSER 3. Create a curvature value patch.
22.
Global Context for
MSER 4. Collect curvature values in log-polar graph,append values to become Global Context.
23.
Matching Results
24.
Matching Results
25.
Matching Results
26.
Matching Results
27.
Matching Results
28.
Matching Results
29.
Matching Results
30.
Matching Results
31.
Matching Results
32.
Future Work Elliptical
neighbouring region for SURF Minimum measurement region for MSER More tests, more images
33.
Thanks!