Author :Andrea Selinger Salgian Department of Computer Science

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Distinctive Image Features from Scale-Invariant Keypoints

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Presentation transcript:

Combining Local Descriptors for 3D Object Recognition and Categorization Author :Andrea Selinger Salgian Department of Computer Science The College of New Jersey date:2009/02/23 repoter：鄒嘉恆

Introduction Combine keyed context patches and SIFT to significantly reduce the error rate on recognition and categorization.

Outline The descriptors Experimental results Conclusion Keyed context patches SIFT Experimental results Object recognition Object categorization Conclusion

Keyed context patches

SIFT(1/5) Scale-space extrema detection

SIFT(2/5) Keypoint localization Elimination low contrast Elimination edge response

SIFT(3/5) Orientation assignment

SIFT(4/5) Keypoint descriptor extraction

SIFT(5/5)

Experimental results(1/2) Object recognition

Experimental results(2/2) Object categorization

Conclusion Confirm that the performance of the descriptor combination is higher than that of either of the descriptors alone.