Upendra Singh Puja Gupta Mukul Shukla Activity detection and counting people using Mask-RCNN with bidirectional ConvLSTM. 6505-6520 2022 43 J. Intell. Fuzzy Syst. 5 https://doi.org/10.3233/JIFS-220503 db/journals/jifs/jifs43.html#SinghGS22