Python torch.float方法代碼示例

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import float [as 別名]
def forward_single(self, x, scale):
        """Forward feature of a single scale level.

        Args:
            x (Tensor): Features of a single scale level.
            scale (:obj: `mmcv.cnn.Scale`): Learnable scale module to resize
                the bbox prediction.

        Returns:
            tuple:
                cls_score (Tensor): Cls and quality joint scores for a single
                    scale level the channel number is num_classes.
                bbox_pred (Tensor): Box distribution logits for a single scale
                    level, the channel number is 4*(n+1), n is max value of
                    integral set.
        """
        cls_feat = x
        reg_feat = x
        for cls_conv in self.cls_convs:
            cls_feat = cls_conv(cls_feat)
        for reg_conv in self.reg_convs:
            reg_feat = reg_conv(reg_feat)
        cls_score = self.gfl_cls(cls_feat)
        bbox_pred = scale(self.gfl_reg(reg_feat)).float()
        return cls_score, bbox_pred 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import float [as 別名]
def rel_roi_point_to_rel_img_point(rois,
                                   rel_roi_points,
                                   img_shape,
                                   spatial_scale=1.):
    """Convert roi based relative point coordinates to image based absolute
    point coordinates.

    Args:
        rois (Tensor): RoIs or BBoxes, shape (N, 4) or (N, 5)
        rel_roi_points (Tensor): Point coordinates inside RoI, relative to
            RoI, location, range (0, 1), shape (N, P, 2)
        img_shape (tuple): (height, width) of image or feature map.
        spatial_scale (float): Scale points by this factor. Default: 1.

    Returns:
        Tensor: Image based relative point coordinates for sampling,
            shape (N, P, 2)
    """

    abs_img_point = rel_roi_point_to_abs_img_point(rois, rel_roi_points)
    rel_img_point = abs_img_point_to_rel_img_point(abs_img_point, img_shape,
                                                   spatial_scale)

    return rel_img_point 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import float [as 別名]
def patch_norm_fp32(module):
    """Recursively convert normalization layers from FP16 to FP32.

    Args:
        module (nn.Module): The modules to be converted in FP16.

    Returns:
        nn.Module: The converted module, the normalization layers have been
            converted to FP32.
    """
    if isinstance(module, (nn.modules.batchnorm._BatchNorm, nn.GroupNorm)):
        module.float()
        if isinstance(module, nn.GroupNorm) or torch.__version__ < '1.3':
            module.forward = patch_forward_method(module.forward, torch.half,
                                                  torch.float)
    for child in module.children():
        patch_norm_fp32(child)
    return module 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import float [as 別名]
def train(net, train_features, train_labels, test_features, test_labels,
          num_epochs, learning_rate, weight_decay, batch_size):
    train_ls, test_ls = [], []
    dataset = torch.utils.data.TensorDataset(train_features, train_labels)
    train_iter = torch.utils.data.DataLoader(dataset, batch_size, shuffle=True)
    optimizer = torch.optim.Adam(params=net.parameters(), lr=learning_rate, weight_decay=weight_decay)
    net = net.float()
    for epoch in range(num_epochs):
        for X, y in train_iter:
            l = loss(net(X.float()), y.float())
            optimizer.zero_grad()
            l.backward()
            optimizer.step()
        train_ls.append(log_rmse(net, train_features, train_labels))
        if test_labels is not None:
            test_ls.append(log_rmse(net, test_features, test_labels))
    return train_ls, test_ls 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import float [as 別名]
def test(self, dataset):
        self.model.eval()
        with torch.no_grad():
            total_loss = 0.0
            predictions = torch.zeros(len(dataset), dtype=torch.float, device='cpu')
            indices = torch.arange(1, dataset.num_classes + 1, dtype=torch.float, device='cpu')
            for idx in tqdm(range(len(dataset)), desc='Testing epoch  ' + str(self.epoch) + ''):
                ltree, linput, rtree, rinput, label = dataset[idx]
                target = utils.map_label_to_target(label, dataset.num_classes)
                linput, rinput = linput.to(self.device), rinput.to(self.device)
                target = target.to(self.device)
                output = self.model(ltree, linput, rtree, rinput)
                loss = self.criterion(output, target)
                total_loss += loss.item()
                output = output.squeeze().to('cpu')
                predictions[idx] = torch.dot(indices, torch.exp(output))
        return total_loss / len(dataset), predictions 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import float [as 別名]
def __getitem__(self, index: int) -> Tuple[str, Tensor, Tensor, Tensor, Tensor]:
        image_id = self._image_ids[index]
        annotation = self._image_id_to_annotation_dict[image_id]

        bboxes = [obj.bbox.tolist() for obj in annotation.objects]
        labels = [COCO2017Animal.CATEGORY_TO_LABEL_DICT[COCO2017.LABEL_TO_CATEGORY_DICT[obj.label]] for obj in annotation.objects]  # mapping from original `COCO2017` dataset

        bboxes = torch.tensor(bboxes, dtype=torch.float)
        labels = torch.tensor(labels, dtype=torch.long)

        image = Image.open(annotation.filename).convert('RGB')  # for some grayscale images

        # random flip on only training mode
        if self._mode == COCO2017Animal.Mode.TRAIN and random.random() > 0.5:
            image = ImageOps.mirror(image)
            bboxes[:, [0, 2]] = image.width - bboxes[:, [2, 0]]  # index 0 and 2 represent `left` and `right` respectively

        image, scale = COCO2017Animal.preprocess(image, self._image_min_side, self._image_max_side)
        scale = torch.tensor(scale, dtype=torch.float)
        bboxes *= scale

        return image_id, image, scale, bboxes, labels 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import float [as 別名]
def _write_results(self, path_to_results_dir: str, image_ids: List[str], bboxes: List[List[float]], classes: List[int], probs: List[float]):
        results = []
        for image_id, bbox, cls, prob in zip(image_ids, bboxes, classes, probs):
            results.append(
                {
                    'image_id': int(image_id),  # COCO evaluation requires `image_id` to be type `int`
                    'category_id': COCO2017.CATEGORY_TO_LABEL_DICT[COCO2017Animal.LABEL_TO_CATEGORY_DICT[cls]],  # mapping to original `COCO2017` dataset
                    'bbox': [   # format [left, top, width, height] is expected
                        bbox[0],
                        bbox[1],
                        bbox[2] - bbox[0],
                        bbox[3] - bbox[1]
                    ],
                    'score': prob
                }
            )

        with open(os.path.join(path_to_results_dir, 'results.json'), 'w') as f:
            json.dump(results, f) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import float [as 別名]
def __getitem__(self, index: int) -> Tuple[str, Tensor, Tensor, Tensor, Tensor]:
        image_id = self._image_ids[index]
        annotation = self._image_id_to_annotation_dict[image_id]

        bboxes = [obj.bbox.tolist() for obj in annotation.objects]
        labels = [COCO2017Person.CATEGORY_TO_LABEL_DICT[COCO2017.LABEL_TO_CATEGORY_DICT[obj.label]] for obj in annotation.objects]  # mapping from original `COCO2017` dataset

        bboxes = torch.tensor(bboxes, dtype=torch.float)
        labels = torch.tensor(labels, dtype=torch.long)

        image = Image.open(annotation.filename).convert('RGB')  # for some grayscale images

        # random flip on only training mode
        if self._mode == COCO2017Person.Mode.TRAIN and random.random() > 0.5:
            image = ImageOps.mirror(image)
            bboxes[:, [0, 2]] = image.width - bboxes[:, [2, 0]]  # index 0 and 2 represent `left` and `right` respectively

        image, scale = COCO2017Person.preprocess(image, self._image_min_side, self._image_max_side)
        scale = torch.tensor(scale, dtype=torch.float)
        bboxes *= scale

        return image_id, image, scale, bboxes, labels 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import float [as 別名]
def _write_results(self, path_to_results_dir: str, image_ids: List[str], bboxes: List[List[float]], classes: List[int], probs: List[float]):
        results = []
        for image_id, bbox, cls, prob in zip(image_ids, bboxes, classes, probs):
            results.append(
                {
                    'image_id': int(image_id),  # COCO evaluation requires `image_id` to be type `int`
                    'category_id': COCO2017.CATEGORY_TO_LABEL_DICT[COCO2017Person.LABEL_TO_CATEGORY_DICT[cls]],  # mapping to original `COCO2017` dataset
                    'bbox': [   # format [left, top, width, height] is expected
                        bbox[0],
                        bbox[1],
                        bbox[2] - bbox[0],
                        bbox[3] - bbox[1]
                    ],
                    'score': prob
                }
            )

        with open(os.path.join(path_to_results_dir, 'results.json'), 'w') as f:
            json.dump(results, f) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import float [as 別名]
def __getitem__(self, index: int) -> Tuple[str, Tensor, Tensor, Tensor, Tensor]:
        image_id = self._image_ids[index]
        annotation = self._image_id_to_annotation_dict[image_id]

        bboxes = [obj.bbox.tolist() for obj in annotation.objects]
        labels = [obj.label for obj in annotation.objects]

        bboxes = torch.tensor(bboxes, dtype=torch.float)
        labels = torch.tensor(labels, dtype=torch.long)

        image = Image.open(annotation.filename).convert('RGB')  # for some grayscale images

        # random flip on only training mode
        if self._mode == COCO2017.Mode.TRAIN and random.random() > 0.5:
            image = ImageOps.mirror(image)
            bboxes[:, [0, 2]] = image.width - bboxes[:, [2, 0]]  # index 0 and 2 represent `left` and `right` respectively

        image, scale = COCO2017.preprocess(image, self._image_min_side, self._image_max_side)
        scale = torch.tensor(scale, dtype=torch.float)
        bboxes *= scale

        return image_id, image, scale, bboxes, labels 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import float [as 別名]
def evaluate(self, path_to_results_dir: str, image_ids: List[str], bboxes: List[List[float]], classes: List[int], probs: List[float]) -> Tuple[float, str]:
        self._write_results(path_to_results_dir, image_ids, bboxes, classes, probs)

        annType = 'bbox'
        path_to_coco_dir = os.path.join(self._path_to_data_dir, 'COCO')
        path_to_annotations_dir = os.path.join(path_to_coco_dir, 'annotations')
        path_to_annotation = os.path.join(path_to_annotations_dir, 'instances_val2017.json')

        cocoGt = COCO(path_to_annotation)
        cocoDt = cocoGt.loadRes(os.path.join(path_to_results_dir, 'results.json'))

        cocoEval = COCOeval(cocoGt, cocoDt, annType)
        cocoEval.evaluate()
        cocoEval.accumulate()

        original_stdout = sys.stdout
        string_stdout = StringIO()
        sys.stdout = string_stdout
        cocoEval.summarize()
        sys.stdout = original_stdout

        mean_ap = cocoEval.stats[0].item()  # stats[0] records AP@[0.5:0.95]
        detail = string_stdout.getvalue()

        return mean_ap, detail 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import float [as 別名]
def _write_results(self, path_to_results_dir: str, image_ids: List[str], bboxes: List[List[float]], classes: List[int], probs: List[float]):
        results = []
        for image_id, bbox, cls, prob in zip(image_ids, bboxes, classes, probs):
            results.append(
                {
                    'image_id': int(image_id),  # COCO evaluation requires `image_id` to be type `int`
                    'category_id': cls,
                    'bbox': [   # format [left, top, width, height] is expected
                        bbox[0],
                        bbox[1],
                        bbox[2] - bbox[0],
                        bbox[3] - bbox[1]
                    ],
                    'score': prob
                }
            )

        with open(os.path.join(path_to_results_dir, 'results.json'), 'w') as f:
            json.dump(results, f) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import float [as 別名]
def __getitem__(self, index: int) -> Tuple[str, Tensor, Tensor, Tensor, Tensor]:
        image_id = self._image_ids[index]
        annotation = self._image_id_to_annotation_dict[image_id]

        bboxes = [obj.bbox.tolist() for obj in annotation.objects]
        labels = [COCO2017Car.CATEGORY_TO_LABEL_DICT[COCO2017.LABEL_TO_CATEGORY_DICT[obj.label]] for obj in annotation.objects]  # mapping from original `COCO2017` dataset

        bboxes = torch.tensor(bboxes, dtype=torch.float)
        labels = torch.tensor(labels, dtype=torch.long)

        image = Image.open(annotation.filename).convert('RGB')  # for some grayscale images

        # random flip on only training mode
        if self._mode == COCO2017Car.Mode.TRAIN and random.random() > 0.5:
            image = ImageOps.mirror(image)
            bboxes[:, [0, 2]] = image.width - bboxes[:, [2, 0]]  # index 0 and 2 represent `left` and `right` respectively

        image, scale = COCO2017Car.preprocess(image, self._image_min_side, self._image_max_side)
        scale = torch.tensor(scale, dtype=torch.float)
        bboxes *= scale

        return image_id, image, scale, bboxes, labels 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import float [as 別名]
def _write_results(self, path_to_results_dir: str, image_ids: List[str], bboxes: List[List[float]], classes: List[int], probs: List[float]):
        results = []
        for image_id, bbox, cls, prob in zip(image_ids, bboxes, classes, probs):
            results.append(
                {
                    'image_id': int(image_id),  # COCO evaluation requires `image_id` to be type `int`
                    'category_id': COCO2017.CATEGORY_TO_LABEL_DICT[COCO2017Car.LABEL_TO_CATEGORY_DICT[cls]],  # mapping to original `COCO2017` dataset
                    'bbox': [   # format [left, top, width, height] is expected
                        bbox[0],
                        bbox[1],
                        bbox[2] - bbox[0],
                        bbox[3] - bbox[1]
                    ],
                    'score': prob
                }
            )

        with open(os.path.join(path_to_results_dir, 'results.json'), 'w') as f:
            json.dump(results, f) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import float [as 別名]
def __init__(self, backbone: BackboneBase, num_classes: int, pooler_mode: Pooler.Mode,
                 anchor_ratios: List[Tuple[int, int]], anchor_sizes: List[int],
                 rpn_pre_nms_top_n: int, rpn_post_nms_top_n: int,
                 anchor_smooth_l1_loss_beta: Optional[float] = None, proposal_smooth_l1_loss_beta: Optional[float] = None):
        super().__init__()

        self.features, hidden, num_features_out, num_hidden_out = backbone.features()
        self._bn_modules = nn.ModuleList([it for it in self.features.modules() if isinstance(it, nn.BatchNorm2d)] +
                                         [it for it in hidden.modules() if isinstance(it, nn.BatchNorm2d)])

        # NOTE: It's crucial to freeze batch normalization modules for few batches training, which can be done by following processes
        #       (1) Change mode to `eval`
        #       (2) Disable gradient (we move this process into `forward`)
        for bn_module in self._bn_modules:
            for parameter in bn_module.parameters():
                parameter.requires_grad = False

        self.rpn = RegionProposalNetwork(num_features_out, anchor_ratios, anchor_sizes, rpn_pre_nms_top_n, rpn_post_nms_top_n, anchor_smooth_l1_loss_beta)
        self.detection = Model.Detection(pooler_mode, hidden, num_hidden_out, num_classes, proposal_smooth_l1_loss_beta)