Uploaded byGail Carmichael
Global Context Descriptors for SURF and MSER Feature Descriptors
This document discusses adding global context descriptors to the SURF and MSER local feature descriptors to improve matching between images. For SURF features, nearby feature points are found and curvature values from a log-polar grid are appended to the original descriptor. For MSER features, shape, texture and curvature patches around the region are measured and appended. Preliminary matching results show the potential of global context descriptors to improve matching performance over the local descriptors alone. Future work includes exploring optimal neighboring region shapes and sizes.
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Global Context Descriptors for SURF and MSER Feature Descriptors
- 1. Global Context Descriptorsfor SURF and MSER Feature DescriptorsGail CarmichaelRobert LaganièreProsenjit Bose
- 2. Gail CarmichaelPhD Student,School of Computer Sciencehttp://www.gailcarmichael.com
- 3. Stuff I careabout...Learning
- 4. Stuff I careabout...Augmented Reality
- 5. Stuff I careabout...Matching Panoramas and Photographs
- 6. SIFT with GlobalContextMortensen, Deng, Shapiro (2005)
- 7. SIFT with GlobalContextMortensen, Deng, Shapiro (2005)
- 8. SIFT with GlobalContextMortensen, Deng, Shapiro (2005)
- 9. Global, But MoreLocalLi and Ma (2009)
- 10. Global, But MoreLocalLi and Ma (2009)
- 11. Global Context forSURFPretty much the same as SIFT
- 12. Global Context forSURF1. Find SURF points with SURFmex
- 13. Global Context forSURF2. Find nearby features for each SURF point
- 14. Global Context forSURF3. Put curvature values in log-polar graph.
- 15. Global Context forSURF4. Append values of bins to get Global Context.
- 16. Global Context forMSERA little different from SIFT/SURF...
- 17. Global Context forMSER1. Detect Maximally Stable Extremal Regions (MSERs) with VLFeat
- 18. Global Context forMSER2a. Create shape patches (Forssén and Lowe).
- 19. Global Context forMSER2b. Create texture patches (Forssénand Lowe).
- 20. Global Context forMSERMeasurement region?Points to measure?Multiple of bounding ellipse.All values around MSER.
- 21. Global Context forMSER3. Create a curvature value patch.
- 22. Global Context forMSER4. Collect curvature values in log-polar graph,append values to become Global Context.
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- 32. Future WorkElliptical neighbouringregion for SURFMinimum measurement region for MSERMore tests, more images
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