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- W4386702911 abstract "Backdoor attacks have been widely studied for image classification tasks, but rarely investigated for video recognition tasks. In this paper, we explore the possibility of physically-realizable backdoor attacks against video recognition models. Different from existing works that directly apply image backdoor attacks to videos, i.e., patch a visible trigger to each frame of a video, we carefully take into consideration the temporal interactions among frames in a video. Our proposed video backdoor attack, named <sc xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>Palette</small> , features two special design choices. The first is to utilize natural-light-alike RGB offset as triggers rather than traditional patch triggers. Such triggers may be applied in the physical world through lighting without the need to modify video files. The second is to make the backdoored model more robust to temporal asynchronization between the trigger and the video samples by performing rolling operations during sample poisoning. Extensive experiments show that <sc xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>Palette</small> outperforms existing video backdoor attacks, especially in the physical world. It is shown that <sc xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>Palette</small> is also resistant to backdoor defense methods. We will open-source our codes upon publication." @default.
- W4386702911 created "2023-09-14" @default.
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- W4386702911 date "2023-01-01" @default.
- W4386702911 modified "2023-09-29" @default.
- W4386702911 title "Palette: Physically-Realizable Backdoor Attacks Against Video Recognition Models" @default.
- W4386702911 doi "https://doi.org/10.1109/tdsc.2023.3314792" @default.
- W4386702911 hasPublicationYear "2023" @default.
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