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- W4297788256 abstract "Gradient-descent methods have exhibited fast and reliable performance for image alignment in the facial domain, but have largely been ignored by the broader vision community. They require the image function be smooth and (numerically) differentiable -- properties that hold for pixel-based representations obeying natural image statistics, but not for more general classes of non-linear feature transforms. We show that transforms such as Dense SIFT can be incorporated into a Lucas Kanade alignment framework by predicting descent directions via regression. This enables robust matching of instances from general object categories whilst maintaining desirable properties of Lucas Kanade such as the capacity to handle high-dimensional warp parametrizations and a fast rate of convergence. We present alignment results on a number of objects from ImageNet, and an extension of the method to unsupervised joint alignment of objects from a corpus of images." @default.
- W4297788256 created "2022-10-01" @default.
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- W4297788256 date "2014-07-08" @default.
- W4297788256 modified "2023-09-26" @default.
- W4297788256 title "Regression-Based Image Alignment for General Object Categories" @default.
- W4297788256 doi "https://doi.org/10.48550/arxiv.1407.1957" @default.
- W4297788256 hasPublicationYear "2014" @default.
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