Inspec keywords: video signal processing; object detection; image representation; approximation theory; learning (artificial intelligence); video coding; computational complexity; image sequences

Other keywords: multiscale three-dimensional gradient; video sequence; real-time detection; reduced dictionary learning-based abnormity detection method; reduced sparse dictionaries; normal feature clusters; low-rank structured sparse representation; dictionary size; low-level feature; spatiotemporal information; low-rank approximation; sparse learning method; low time complexity; structured sparsity property

Subjects: Computer vision and image processing techniques; Computational complexity; Image and video coding; Video signal processing; Interpolation and function approximation (numerical analysis); Knowledge engineering techniques; Interpolation and function approximation (numerical analysis)