Distinctive Image Features from Scale-Invariant Keypoints
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502 citations
Cites background from "Distinctive Image Features from Sca..."
...Bag-of-features approaches [20, 12, 14, 23, 26, 4], represent images, or portions of images, by a distribution/collection of, possibly densely computed, local descriptors, vector-quantized according to a predefined appearance dictionary (made of appearance labels)....
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...(2)Different flavors of HOG’s have proven to be successful in several settings [12, 2, 10]....
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502 citations
502 citations
Cites background or methods from "Distinctive Image Features from Sca..."
...We extract SIFT [29] descriptors at 4 scales corresponding to region widths of 16, 24, 32 and 40 pixels....
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...First, we evaluate the VLAD descriptor based on the Difference of Gaussian (DoG) local invariant features [29, 42] (Sparse VLAD)....
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...Finally, we represent images using densely sampled local gradient based descriptors (SIFT [29] in our case) across multiple scales....
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...These representations are built on local invariant features such as SIFT [29] so that recognition can proceed across moderate changes in viewpoint, scale or partial occlusion by other objects....
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...as it does not rely on repeatable detection of local invariant features, such as the Laplacian of Gaussian [29]....
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501 citations
References
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"Distinctive Image Features from Sca..." refers background or methods in this paper
...The initial implementation of this approach (Lowe, 1999) simply located keypoints at the location and scale of the central sample point....
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...Earlier work by the author (Lowe, 1999) extended the local feature approach to achieve scale invariance....
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...More details on applications of these features to recognition are available in other pape rs (Lowe, 1999; Lowe, 2001; Se, Lowe and Little, 2002)....
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...To efficiently detect stable keypoint locations in scale space, we have proposed (Lowe, 1999) using scalespace extrema in the difference-of-Gaussian function convolved with the image, D(x, y, σ ), which can be computed from the difference of two nearby scales separated by a constant multiplicative…...
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...More details on applications of these features to recognition are available in other papers (Lowe, 1999, 2001; Se et al., 2002)....
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14,282 citations
"Distinctive Image Features from Sca..." refers background in this paper
...A more general solution would be to solve for the fundamental matrix (Luong and Faugeras, 1996; Hartley and Zisserman, 2000)....
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