Python layers.smooth_l1_loss方法代碼示例

# 需要導入模塊: from maskrcnn_benchmark import layers [as 別名]
# 或者: from maskrcnn_benchmark.layers import smooth_l1_loss [as 別名]
def __call__(self, anchors, box_cls, box_regression, targets):
        """
        Arguments:
            anchors (list[BoxList])
            box_cls (list[Tensor])
            box_regression (list[Tensor])
            targets (list[BoxList])

        Returns:
            retinanet_cls_loss (Tensor)
            retinanet_regression_loss (Tensor
        """
        anchors = [cat_boxlist(anchors_per_image) for anchors_per_image in anchors]
        labels, regression_targets = self.prepare_targets(anchors, targets)

        N = len(labels)
        box_cls, box_regression = \
                concat_box_prediction_layers(box_cls, box_regression)

        labels = torch.cat(labels, dim=0)
        regression_targets = torch.cat(regression_targets, dim=0)
        pos_inds = torch.nonzero(labels > 0).squeeze(1)

        retinanet_regression_loss = smooth_l1_loss(
            box_regression[pos_inds],
            regression_targets[pos_inds],
            beta=self.bbox_reg_beta,
            size_average=False,
        ) / (max(1, pos_inds.numel() * self.regress_norm))

        labels = labels.int()

        retinanet_cls_loss = self.box_cls_loss_func(
            box_cls,
            labels
        ) / (pos_inds.numel() + N)

        return retinanet_cls_loss, retinanet_regression_loss 

# 需要導入模塊: from maskrcnn_benchmark import layers [as 別名]
# 或者: from maskrcnn_benchmark.layers import smooth_l1_loss [as 別名]
def __call__(self, anchors, box_cls, box_regression, targets):
        """
        Arguments:
            anchors (list[BoxList])
            box_cls (list[Tensor])
            box_regression (list[Tensor])
            targets (list[BoxList])

        Returns:
            retinanet_cls_loss (Tensor)
            retinanet_regression_loss (Tensor
        """
        anchors = [cat_boxlist(anchors_per_image) for anchors_per_image in anchors]
        labels, regression_targets = self.prepare_targets(anchors, targets)

        N = len(labels)
        box_cls, box_regression = \
                concat_box_prediction_layers(box_cls, box_regression)

        labels = torch.cat(labels, dim=0)
        regression_targets = torch.cat(regression_targets, dim=0)
        pos_inds = torch.nonzero(labels > 0).squeeze(1)

        retinanet_regression_loss = smooth_l1_loss(
            box_regression[pos_inds],
            regression_targets[pos_inds],
            beta=self.bbox_reg_beta,
            size_average=False,
        ) / (max(1, pos_inds.numel() * self.regress_norm))

        labels = labels.int()

        retinanet_cls_loss = self.box_cls_loss_func(
            box_cls,
            labels
        ) / (pos_inds.numel() + N)
        
        return retinanet_cls_loss, retinanet_regression_loss 

# 需要導入模塊: from maskrcnn_benchmark import layers [as 別名]
# 或者: from maskrcnn_benchmark.layers import smooth_l1_loss [as 別名]
def __call__(self, anchors, objectness, box_regression, targets):
        """
        Arguments:
            anchors (list[list[BoxList]])
            objectness (list[Tensor])
            box_regression (list[Tensor])
            targets (list[BoxList])

        Returns:
            objectness_loss (Tensor)
            box_loss (Tensor)
        """
        anchors = [cat_boxlist(anchors_per_image) for anchors_per_image in anchors]
        labels, regression_targets = self.prepare_targets(anchors, targets)
        sampled_pos_inds, sampled_neg_inds = self.fg_bg_sampler(labels)
        sampled_pos_inds = torch.nonzero(torch.cat(sampled_pos_inds, dim=0)).squeeze(1)
        sampled_neg_inds = torch.nonzero(torch.cat(sampled_neg_inds, dim=0)).squeeze(1)

        sampled_inds = torch.cat([sampled_pos_inds, sampled_neg_inds], dim=0)

        objectness, box_regression = \
                concat_box_prediction_layers(objectness, box_regression)

        objectness = objectness.squeeze()

        labels = torch.cat(labels, dim=0)
        regression_targets = torch.cat(regression_targets, dim=0)

        box_loss = smooth_l1_loss(
            box_regression[sampled_pos_inds],
            regression_targets[sampled_pos_inds],
            beta=1.0 / 9,
            size_average=False,
        ) / (sampled_inds.numel())

        objectness_loss = F.binary_cross_entropy_with_logits(
            objectness[sampled_inds], labels[sampled_inds]
        )

        return objectness_loss, box_loss 

# 需要導入模塊: from maskrcnn_benchmark import layers [as 別名]
# 或者: from maskrcnn_benchmark.layers import smooth_l1_loss [as 別名]
def __call__(self, class_logits, box_regression):
        """
        Computes the loss for Faster R-CNN.
        This requires that the subsample method has been called beforehand.

        Arguments:
            class_logits (list[Tensor])
            box_regression (list[Tensor])

        Returns:
            classification_loss (Tensor)
            box_loss (Tensor)
        """

        class_logits = cat(class_logits, dim=0)
        box_regression = cat(box_regression, dim=0)
        device = class_logits.device

        if not hasattr(self, "_proposals"):
            raise RuntimeError("subsample needs to be called before")

        proposals = self._proposals

        labels = cat([proposal.get_field("labels") for proposal in proposals], dim=0)
        regression_targets = cat(
            [proposal.get_field("regression_targets") for proposal in proposals], dim=0
        )

        classification_loss = F.cross_entropy(class_logits, labels)

        # get indices that correspond to the regression targets for
        # the corresponding ground truth labels, to be used with
        # advanced indexing
        sampled_pos_inds_subset = torch.nonzero(labels > 0).squeeze(1)
        labels_pos = labels[sampled_pos_inds_subset]
        if self.cls_agnostic_bbox_reg:
            map_inds = torch.tensor([4, 5, 6, 7], device=device)
        else:
            map_inds = 4 * labels_pos[:, None] + torch.tensor(
                [0, 1, 2, 3], device=device)

        box_loss = smooth_l1_loss(
            box_regression[sampled_pos_inds_subset[:, None], map_inds],
            regression_targets[sampled_pos_inds_subset],
            size_average=False,
            beta=1,
        )
        box_loss = box_loss / labels.numel()

        return classification_loss, box_loss 

# 需要導入模塊: from maskrcnn_benchmark import layers [as 別名]
# 或者: from maskrcnn_benchmark.layers import smooth_l1_loss [as 別名]
def __call__(self, anchors, objectness, box_regression, targets):
        """
        Arguments:
            anchors (list[BoxList])
            objectness (list[Tensor])
            box_regression (list[Tensor])
            targets (list[BoxList])

        Returns:
            objectness_loss (Tensor)
            box_loss (Tensor
        """
        anchors = [cat_boxlist(anchors_per_image) for anchors_per_image in anchors]
        labels, regression_targets = self.prepare_targets(anchors, targets)
        sampled_pos_inds, sampled_neg_inds = self.fg_bg_sampler(labels)
        sampled_pos_inds = torch.nonzero(torch.cat(sampled_pos_inds, dim=0)).squeeze(1)
        sampled_neg_inds = torch.nonzero(torch.cat(sampled_neg_inds, dim=0)).squeeze(1)

        sampled_inds = torch.cat([sampled_pos_inds, sampled_neg_inds], dim=0)

        objectness, box_regression = \
                concat_box_prediction_layers(objectness, box_regression)

        objectness = objectness.squeeze()

        labels = torch.cat(labels, dim=0)
        regression_targets = torch.cat(regression_targets, dim=0)

        box_loss = smooth_l1_loss(
            box_regression[sampled_pos_inds],
            regression_targets[sampled_pos_inds],
            beta=1.0 / 9,
            size_average=False,
        ) / (sampled_inds.numel())

        objectness_loss = F.binary_cross_entropy_with_logits(
            objectness[sampled_inds], labels[sampled_inds]
        )

        return objectness_loss, box_loss

# This function should be overwritten in RetinaNet 

# 需要導入模塊: from maskrcnn_benchmark import layers [as 別名]
# 或者: from maskrcnn_benchmark.layers import smooth_l1_loss [as 別名]
def __call__(self, anchors, objectness, box_regression, targets):
        """
        Arguments:
            anchors (list[list[BoxList]])
            objectness (list[Tensor])
            box_regression (list[Tensor])
            targets (list[BoxList])

        Returns:
            objectness_loss (Tensor)
            box_loss (Tensor)
        """
        anchors = [cat_boxlist(anchors_per_image) for anchors_per_image in anchors]
        labels, regression_targets = self.prepare_targets(anchors, targets)
        sampled_pos_inds, sampled_neg_inds = self.fg_bg_sampler(labels)
        sampled_pos_inds = torch.nonzero(torch.cat(sampled_pos_inds, dim=0)).squeeze(1)
        sampled_neg_inds = torch.nonzero(torch.cat(sampled_neg_inds, dim=0)).squeeze(1)

        sampled_inds = torch.cat([sampled_pos_inds, sampled_neg_inds], dim=0)

        objectness, box_regression = \
                concat_box_prediction_layers(objectness, box_regression)

        objectness = objectness.squeeze()

        labels = torch.cat(labels, dim=0)
        regression_targets = torch.cat(regression_targets, dim=0)

        box_loss = smooth_l1_loss(
            box_regression[sampled_pos_inds],
            regression_targets[sampled_pos_inds],
            beta=1.0 / 9,
            size_average=False,
        ) / (sampled_inds.numel())

        objectness_loss = F.binary_cross_entropy_with_logits(
            objectness[sampled_inds], labels[sampled_inds]
        )

        return objectness_loss, box_loss

# This function should be overwritten in RetinaNet 

# 需要導入模塊: from maskrcnn_benchmark import layers [as 別名]
# 或者: from maskrcnn_benchmark.layers import smooth_l1_loss [as 別名]
def __call__(self, anchors, objectness, box_regression, targets):
        """
        Arguments:
            anchors (list[BoxList])
            objectness (list[Tensor])
            box_regression (list[Tensor])
            targets (list[BoxList])

        Returns:
            objectness_loss (Tensor)
            box_loss (Tensor
        """
        anchors = [cat_boxlist(anchors_per_image) for anchors_per_image in anchors]
        labels, regression_targets = self.prepare_targets(anchors, targets)
        sampled_pos_inds, sampled_neg_inds = self.fg_bg_sampler(labels)
        sampled_pos_inds = torch.nonzero(torch.cat(sampled_pos_inds, dim=0)).squeeze(1)
        sampled_neg_inds = torch.nonzero(torch.cat(sampled_neg_inds, dim=0)).squeeze(1)

        sampled_inds = torch.cat([sampled_pos_inds, sampled_neg_inds], dim=0)

        objectness_flattened = []
        box_regression_flattened = []
        # for each feature level, permute the outputs to make them be in the
        # same format as the labels. Note that the labels are computed for
        # all feature levels concatenated, so we keep the same representation
        # for the objectness and the box_regression
        for objectness_per_level, box_regression_per_level in zip(
            objectness, box_regression
        ):
            N, A, H, W = objectness_per_level.shape
            objectness_per_level = objectness_per_level.permute(0, 2, 3, 1).reshape(
                N, -1
            )
            box_regression_per_level = box_regression_per_level.view(N, -1, 4, H, W)
            box_regression_per_level = box_regression_per_level.permute(0, 3, 4, 1, 2)
            box_regression_per_level = box_regression_per_level.reshape(N, -1, 4)
            objectness_flattened.append(objectness_per_level)
            box_regression_flattened.append(box_regression_per_level)
        # concatenate on the first dimension (representing the feature levels), to
        # take into account the way the labels were generated (with all feature maps
        # being concatenated as well)
        objectness = cat(objectness_flattened, dim=1).reshape(-1)
        box_regression = cat(box_regression_flattened, dim=1).reshape(-1, 4)

        labels = torch.cat(labels, dim=0)
        regression_targets = torch.cat(regression_targets, dim=0)

        box_loss = smooth_l1_loss(
            box_regression[sampled_pos_inds],
            regression_targets[sampled_pos_inds],
            beta=1.0 / 9,
            size_average=False,
        ) / (sampled_inds.numel())

        objectness_loss = F.binary_cross_entropy_with_logits(
            objectness[sampled_inds], labels[sampled_inds]
        )

        return objectness_loss, box_loss 

# 需要導入模塊: from maskrcnn_benchmark import layers [as 別名]
# 或者: from maskrcnn_benchmark.layers import smooth_l1_loss [as 別名]
def __call__(self, class_logits, box_regression):
        """
        Computes the loss for Faster R-CNN.
        This requires that the subsample method has been called beforehand.

        Arguments:
            class_logits (list[Tensor])
            box_regression (list[Tensor])

        Returns:
            classification_loss (Tensor)
            box_loss (Tensor)
        """

        class_logits = cat(class_logits, dim=0)
        box_regression = cat(box_regression, dim=0)
        device = class_logits.device

        if not hasattr(self, "_proposals"):
            raise RuntimeError("subsample needs to be called before")

        proposals = self._proposals

        labels = cat([proposal.get_field("labels") for proposal in proposals], dim=0)
        regression_targets = cat(
            [proposal.get_field("regression_targets") for proposal in proposals], dim=0
        )

        classification_loss = F.cross_entropy(class_logits, labels)

        # get indices that correspond to the regression targets for
        # the corresponding ground truth labels, to be used with
        # advanced indexing
        sampled_pos_inds_subset = torch.nonzero(labels > 0).squeeze(1)
        labels_pos = labels[sampled_pos_inds_subset]
        map_inds = 4 * labels_pos[:, None] + torch.tensor([0, 1, 2, 3], device=device)

        box_loss = smooth_l1_loss(
            box_regression[sampled_pos_inds_subset[:, None], map_inds],
            regression_targets[sampled_pos_inds_subset],
            size_average=False,
            beta=1,
        )
        box_loss = box_loss / labels.numel()

        return classification_loss, box_loss 

# 需要導入模塊: from maskrcnn_benchmark import layers [as 別名]
# 或者: from maskrcnn_benchmark.layers import smooth_l1_loss [as 別名]
def __call__(self, class_logits, box_regression):
        """
        Computes the loss for Faster R-CNN.
        This requires that the subsample method has been called beforehand.

        Arguments:
            class_logits (list[Tensor])
            box_regression (list[Tensor])

        Returns:
            classification_loss (Tensor)
            box_loss (Tensor)
        """

        class_logits = cat(class_logits, dim=0)
        box_regression = cat(box_regression, dim=0)
        device = class_logits.device

        if not hasattr(self, "_proposals"):
            raise RuntimeError("subsample needs to be called before")

        proposals = self._proposals

        labels = cat([proposal.get_field("labels") for proposal in proposals], dim=0)
        regression_targets = cat(
            [proposal.get_field("regression_targets") for proposal in proposals], dim=0
        )
        classification_loss = F.cross_entropy(class_logits, labels)

        # get indices that correspond to the regression targets for
        # the corresponding ground truth labels, to be used with
        # advanced indexing
        sampled_pos_inds_subset = torch.nonzero(labels > 0).squeeze(1)
        labels_pos = labels[sampled_pos_inds_subset]
        if self.cls_agnostic_bbox_reg:
            map_inds = torch.tensor([4, 5, 6, 7], device=device)
        else:
            map_inds = 4 * labels_pos[:, None] + torch.tensor(
                [0, 1, 2, 3], device=device)

        box_loss = smooth_l1_loss(
            box_regression[sampled_pos_inds_subset[:, None], map_inds],
            regression_targets[sampled_pos_inds_subset],
            size_average=False,
            beta=1,
        )
        box_loss = box_loss / labels.numel()
        return classification_loss, box_loss 

# 需要導入模塊: from maskrcnn_benchmark import layers [as 別名]
# 或者: from maskrcnn_benchmark.layers import smooth_l1_loss [as 別名]
def __call__(self, class_logits, box_regression):
        """
        Computes the loss for Faster R-CNN.
        This requires that the subsample method has been called beforehand.

        Arguments:
            class_logits (list[Tensor])
            box_regression (list[Tensor])

        Returns:
            classification_loss (Tensor)
            box_loss (Tensor)
        """

        class_logits = cat(class_logits, dim=0)
        box_regression = cat(box_regression, dim=0)
        device = class_logits.device

        if not hasattr(self, "_proposals"):
            raise RuntimeError("subsample needs to be called before")

        proposals = self._proposals

        labels = cat([proposal.get_field("labels") for proposal in proposals], dim=0)
        regression_targets = cat(
            [proposal.get_field("regression_targets") for proposal in proposals], dim=0
        ).type_as(box_regression)

        classification_loss = F.cross_entropy(class_logits, labels)

        # get indices that correspond to the regression targets for
        # the corresponding ground truth labels, to be used with
        # advanced indexing
        sampled_pos_inds_subset = torch.nonzero(labels > 0).squeeze(1)
        labels_pos = labels[sampled_pos_inds_subset]
        map_inds = 4 * labels_pos[:, None] + torch.tensor([0, 1, 2, 3], device=device)

        box_loss = smooth_l1_loss(
            box_regression[sampled_pos_inds_subset[:, None], map_inds],
            regression_targets[sampled_pos_inds_subset],
            size_average=False,
            beta=1,
        )
        box_loss = box_loss / labels.numel()

        return classification_loss, box_loss 

# 需要導入模塊: from maskrcnn_benchmark import layers [as 別名]
# 或者: from maskrcnn_benchmark.layers import smooth_l1_loss [as 別名]
def __call__(self, anchors, objectness, box_regression, targets):
        """
        Arguments:
            anchors (list[BoxList])
            objectness (list[Tensor])
            box_regression (list[Tensor])
            targets (list[BoxList])

        Returns:
            objectness_loss (Tensor)
            box_loss (Tensor
        """
        anchors = [cat_boxlist(anchors_per_image) for anchors_per_image in anchors]
        labels, regression_targets = self.prepare_targets(anchors, targets)
        sampled_pos_inds, sampled_neg_inds = self.fg_bg_sampler(labels)
        sampled_pos_inds = torch.nonzero(torch.cat(sampled_pos_inds, dim=0)).squeeze(1)
        sampled_neg_inds = torch.nonzero(torch.cat(sampled_neg_inds, dim=0)).squeeze(1)

        sampled_inds = torch.cat([sampled_pos_inds, sampled_neg_inds], dim=0)

        objectness_flattened = []
        box_regression_flattened = []
        # for each feature level, permute the outputs to make them be in the
        # same format as the labels. Note that the labels are computed for
        # all feature levels concatenated, so we keep the same representation
        # for the objectness and the box_regression
        for objectness_per_level, box_regression_per_level in zip(
            objectness, box_regression
        ):
            N, A, H, W = objectness_per_level.shape
            objectness_per_level = objectness_per_level.permute(0, 2, 3, 1).reshape(
                N, -1
            )
            box_regression_per_level = box_regression_per_level.view(N, -1, 4, H, W)
            box_regression_per_level = box_regression_per_level.permute(0, 3, 4, 1, 2)
            box_regression_per_level = box_regression_per_level.reshape(N, -1, 4)
            objectness_flattened.append(objectness_per_level)
            box_regression_flattened.append(box_regression_per_level)
        # concatenate on the first dimension (representing the feature levels), to
        # take into account the way the labels were generated (with all feature maps
        # being concatenated as well)
        objectness = cat(objectness_flattened, dim=1).reshape(-1)
        box_regression = cat(box_regression_flattened, dim=1).reshape(-1, 4)

        labels = torch.cat(labels, dim=0).type_as(objectness)
        regression_targets = torch.cat(regression_targets, dim=0).type_as(box_regression)

        box_loss = smooth_l1_loss(
            box_regression[sampled_pos_inds],
            regression_targets[sampled_pos_inds],
            beta=1.0 / 9,
            size_average=False,
        ) / (sampled_inds.numel())

        objectness_loss = F.binary_cross_entropy_with_logits(
            objectness[sampled_inds], labels[sampled_inds]
        )

        return objectness_loss, box_loss 

# 需要導入模塊: from maskrcnn_benchmark import layers [as 別名]
# 或者: from maskrcnn_benchmark.layers import smooth_l1_loss [as 別名]
def __call__(self, class_logits, box_regression):
        """
        Computes the loss for Faster R-CNN.
        This requires that the subsample method has been called beforehand.

        Arguments:
            class_logits (list[Tensor])
            box_regression (list[Tensor])

        Returns:
            classification_loss (Tensor)
            box_loss (Tensor)
        """

        class_logits = cat(class_logits, dim=0)
        box_regression = cat(box_regression, dim=0)
        device = class_logits.device

        if not hasattr(self, "_proposals"):
            raise RuntimeError("subsample needs to be called before")

        proposals = self._proposals

        labels = cat([proposal.get_field("labels") for proposal in proposals], dim=0)
        regression_targets = cat(
            [proposal.get_field("regression_targets") for proposal in proposals], dim=0
        )

        classification_loss = F.cross_entropy(class_logits, labels)

        # get indices that correspond to the regression targets for
        # the corresponding ground truth labels, to be used with
        # advanced indexing
        sampled_pos_inds_subset = torch.nonzero(labels > 0).squeeze(1)
        labels_pos = labels[sampled_pos_inds_subset]
        map_inds = 4 * labels_pos[:, None] + torch.tensor([0, 1, 2, 3], device=device)

        box_loss = smooth_l1_loss(
            box_regression[sampled_pos_inds_subset[:, None], map_inds],
            regression_targets[sampled_pos_inds_subset],
            size_average=False,
            beta=1,
        )
        box_loss = box_loss / labels.numel()

        return dict(loss_classifier=classification_loss, loss_box_reg=box_loss)