Class TensorboardWriter

slowfast/visualization/tensorboard_vis.py:20–235

Helper class to log information to Tensorboard.

class TensorboardWriter(object):
    """
    Helper class to log information to Tensorboard.
    """

    def __init__(self, cfg):
        """
        Args:
            cfg (CfgNode): configs. Details can be found in
                slowfast/config/defaults.py
        """
        # class_names: list of class names.
        # cm_subset_classes: a list of class ids -- a user-specified subset.
        # parent_map: dictionary where key is the parent class name and
        #   value is a list of ids of its children classes.
        # hist_subset_classes: a list of class ids -- user-specified to plot histograms.
        (
            self.class_names,
            self.cm_subset_classes,
            self.parent_map,
            self.hist_subset_classes,
        ) = (None, None, None, None)
        self.cfg = cfg
        self.cm_figsize = cfg.TENSORBOARD.CONFUSION_MATRIX.FIGSIZE
        self.hist_figsize = cfg.TENSORBOARD.HISTOGRAM.FIGSIZE

        if cfg.TENSORBOARD.LOG_DIR == "":
            log_dir = os.path.join(
                cfg.OUTPUT_DIR, "runs-{}".format(cfg.TRAIN.DATASET)
            )
        else:
            log_dir = os.path.join(cfg.OUTPUT_DIR, cfg.TENSORBOARD.LOG_DIR)

        self.writer = SummaryWriter(log_dir=log_dir)
        logger.info(
            "To see logged results in Tensorboard, please launch using the command \
            `tensorboard  --port=<port-number> --logdir {}`".format(
                log_dir
            )
        )

        if cfg.TENSORBOARD.CLASS_NAMES_PATH != "":
            if cfg.DETECTION.ENABLE:
                logger.info(
                    "Plotting confusion matrix is currently \
                    not supported for detection."
                )
            (
                self.class_names,
                self.parent_map,
                self.cm_subset_classes,
            ) = get_class_names(
                cfg.TENSORBOARD.CLASS_NAMES_PATH,
                cfg.TENSORBOARD.CATEGORIES_PATH,
                cfg.TENSORBOARD.CONFUSION_MATRIX.SUBSET_PATH,
            )

            if cfg.TENSORBOARD.HISTOGRAM.ENABLE: