2022
DOI: 10.1109/tpami.2022.3199970
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Optimizing Partial Area Under the Top-K Curve: Theory and Practice

Abstract: Top-k error has become a popular metric for large-scale classification benchmarks due to the inevitable semantic ambiguity among classes. Existing literature on top-k optimization generally focuses on the optimization method of the top-k objective, while ignoring the limitations of the metric itself. In this paper, we point out that the top-k objective lacks enough discrimination such that the induced predictions may give a totally irrelevant label a top rank. To fix this issue, we develop a novel metric named… Show more

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Cited by 1 publication
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“…Top-π‘˜ ranking optimization has a significant amount of applications in various fields, such as binary classification [14,15], multi-class classification [3,6,52], and multi-label learning [19]. Due to the discontinuity of individual top-π‘˜ error, it is computationally hard to directly minimize the top-π‘˜ loss.…”
Section: Top-π‘˜ Ranking Optimizationmentioning
confidence: 99%
“…Top-π‘˜ ranking optimization has a significant amount of applications in various fields, such as binary classification [14,15], multi-class classification [3,6,52], and multi-label learning [19]. Due to the discontinuity of individual top-π‘˜ error, it is computationally hard to directly minimize the top-π‘˜ loss.…”
Section: Top-π‘˜ Ranking Optimizationmentioning
confidence: 99%