task_categories:video-classification task_categories:image-classification task_categories:image-to-video task_categories:image-segmentation task_categories:image-feature-extraction task_categories:feature-extraction task_categories:object-detection language:en license:cc-by-nc-nd-4.0 size_categories:n<1K format:imagefolder modality:image modality:video library:datasets library:mlcroissant region:us Biometric Attack liveness detection systems anti-spoofing face anti spoofing