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| import torch | |
| from torch.optim import AdamW | |
| from torch.nn.parallel import DistributedDataParallel as DDP | |
| from modules.rife.model_ifnet import IFNet | |
| from modules.rife.loss import EPE, SOBEL | |
| from modules import devices | |
| class RifeModel: | |
| def __init__(self, local_rank=-1): | |
| self.flownet = IFNet() | |
| self.device() | |
| self.optimG = AdamW(self.flownet.parameters(), lr=1e-6, weight_decay=1e-4) | |
| self.epe = EPE() | |
| self.version = 3.9 | |
| # self.vgg = VGGPerceptualLoss().to(device) | |
| self.sobel = SOBEL() | |
| if local_rank != -1: | |
| self.flownet = DDP(self.flownet, device_ids=[local_rank], output_device=local_rank) | |
| def train(self): | |
| self.flownet.train() | |
| def eval(self): | |
| self.flownet.eval() | |
| def device(self): | |
| self.flownet.to(devices.device) | |
| self.flownet.to(devices.dtype) | |
| def load_model(self, model_file, rank=0): | |
| def convert(param): | |
| if rank == -1: | |
| return { k.replace("module.", ""): v for k, v in param.items() if "module." in k } | |
| else: | |
| return param | |
| if rank <= 0: | |
| if torch.cuda.is_available(): | |
| self.flownet.load_state_dict(convert(torch.load(model_file)), False) | |
| else: | |
| self.flownet.load_state_dict(convert(torch.load(model_file, map_location='cpu')), False) | |
| def save_model(self, model_file, rank=0): | |
| if rank == 0: | |
| torch.save(self.flownet.state_dict(), model_file) | |
| def inference(self, img0, img1, timestep=0.5, scale=1.0): | |
| imgs = torch.cat((img0, img1), 1) | |
| scale_list = [8/scale, 4/scale, 2/scale, 1/scale] | |
| _flow, _mask, merged = self.flownet(imgs, timestep, scale_list) | |
| return merged[3] | |
| def update(self, imgs, gt, learning_rate=0, mul=1, training=True, flow_gt=None): # pylint: disable=unused-argument | |
| for param_group in self.optimG.param_groups: | |
| param_group['lr'] = learning_rate | |
| # img0 = imgs[:, :3] | |
| # img1 = imgs[:, 3:] | |
| if training: | |
| self.train() | |
| else: | |
| self.eval() | |
| scale = [8, 4, 2, 1] | |
| flow, mask, merged = self.flownet(torch.cat((imgs, gt), 1), scale=scale, training=training) | |
| loss_l1 = (merged[3] - gt).abs().mean() | |
| loss_smooth = self.sobel(flow[3], flow[3]*0).mean() | |
| # loss_vgg = self.vgg(merged[2], gt) | |
| if training: | |
| self.optimG.zero_grad() | |
| loss_G = loss_l1 + loss_smooth * 0.1 | |
| loss_G.backward() | |
| self.optimG.step() | |
| # else: | |
| # flow_teacher = flow[2] | |
| return merged[3], { | |
| 'mask': mask, | |
| 'flow': flow[3][:, :2], | |
| 'loss_l1': loss_l1, | |
| 'loss_smooth': loss_smooth, | |
| } | |