History of engineering & technology convolutional neural network (CNN) convolutional neural networks deep learning generative adversarial network image processing image restoration object detection 3D CenterNet Faster R-CNN Indian Sign Language (ISL) MCV and MLV filters MVD RFCN RetinaNet SNIPER SSD Technology: general issues UAVs UNIWARD VVC VisDrone2019 WOW Wasserstein distance Wiener-Granger causality YOLOv3 acauisition function adversarial loss aerial imagery