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|
- import _add_project_path
- import os
- import pickle
- import tqdm
- import numpy as np
- import tensorflow as tf
- from absl import flags, app
- from termcolor import colored
- from calc4ap.voc import CalcVOCmAP
- from libs.models import YOLO, get_xception_backbone
- from libs.losses import train_step, get_losses
- from libs.loggers import TrainLogHandler, ValLogHandler
- from libs.loggers.console_logs import get_logger
- from libs.loggers.tb_logs import tb_write_sampled_voc_gt_imgs, tb_write_imgs
- from libs.utils import yolo_output2boxes, box_postp2use, viz_pred
- from datasets.voc_tfds.voc import GetVoc
- from datasets.voc_tfds.libs import prep_voc_data, VOC_CLS_MAP
- from datasets.voc_tfds.eval.prepare_eval import get_labels
- from configs import cfg, ProjectPath
- FLAGS = flags.FLAGS
- flags.DEFINE_integer('epochs', default=cfg.epochs, help='Number of training epochs')
- flags.DEFINE_float('init_lr', default=cfg.init_lr, help='Initial learning rate')
- flags.DEFINE_float('lr_decay_rate', default=cfg.lr_decay_rate, help='Learning rate decay rate')
- flags.DEFINE_integer('lr_decay_steps', default=cfg.lr_decay_steps, help='Learning rate decay steps')
- flags.DEFINE_integer('batch_size', default=cfg.batch_size, help='Batch size')
- flags.DEFINE_integer('val_step', default=cfg.val_step, help='Validation interval during training')
- flags.DEFINE_integer('tb_img_max_outputs', default=cfg.tb_img_max_outputs, help='Number of visualized prediction images in tensorboard')
- flags.DEFINE_float('train_ds_sample_ratio', default=cfg.train_ds_sample_ratio, help='Training dataset sampling ratio')
- flags.DEFINE_float('val_ds_sample_ratio', default=cfg.val_ds_sample_ratio, help='Validation dataset sampling ratio')
- # flags.mark_flag_as_required('')
- # Save some gpu errors
- physical_devices = tf.config.list_physical_devices('GPU')
- tf.config.experimental.set_memory_growth(device=physical_devices[0], enable=True)
- VOC_PB_DIR = os.path.join(ProjectPath.VOC_CKPTS_DIR.value, f'yolo_voc_{cfg.input_height}x{cfg.input_width}')
-
- def main(_argv):
- global voc, val_labels
- global logger, tb_train_writer, tb_val_writer, train_viz_batch_data, val_viz_batch_data
- global yolo, optimizer
- global VOC_PB_DIR, ckpt, ckpt_manager
- global val_metrics
- # Dataset (PascalVOC)
- voc = GetVoc(batch_size=FLAGS.batch_size)
- val_labels_path = os.path.join(ProjectPath.DATASETS_DIR.value, 'voc_tfds', 'eval', 'val_labels_448_full.pickle')
- if FLAGS.val_ds_sample_ratio == 1:
- if os.path.exists(val_labels_path):
- val_labels = pickle.load(open(val_labels_path, 'rb'))
- else:
- val_labels = get_labels(voc.get_val_ds(), cfg.input_height, cfg.input_width, VOC_CLS_MAP, full_save=True)
- else:
- val_labels = get_labels(voc.get_val_ds(sample_ratio=FLAGS.val_ds_sample_ratio), cfg.input_height, cfg.input_width, VOC_CLS_MAP)
-
- # Logger
- logger = get_logger()
- logger.propagate = False
- # Tensorboard
- tb_train_writer = tf.summary.create_file_writer(ProjectPath.TB_LOGS_TRAIN_DIR.value)
- tb_val_writer = tf.summary.create_file_writer(ProjectPath.TB_LOGS_VAL_DIR.value)
- train_viz_batch_data = next(iter(voc.get_train_ds(shuffle=False, drop_remainder=False).take(1)))
- val_viz_batch_data = next(iter(voc.get_val_ds().take(1)))
-
- # Prediction Visualization (Tensorboard)
- tb_write_sampled_voc_gt_imgs(
- batch_data=train_viz_batch_data,
- input_height=cfg.input_height,
- input_width=cfg.input_width,
- val=True,
- tb_writer=tb_train_writer,
- name='[Train] GT',
- max_outputs=FLAGS.tb_img_max_outputs,
- )
- tb_write_sampled_voc_gt_imgs(
- batch_data=val_viz_batch_data,
- input_height=cfg.input_height,
- input_width=cfg.input_width,
- val=True,
- tb_writer=tb_val_writer,
- name='[Val] GT',
- max_outputs=FLAGS.tb_img_max_outputs,
- )
- # Model
- backbone_xception = get_xception_backbone(input_height=cfg.input_height, input_width=cfg.input_width, freeze=False)
- yolo = YOLO(backbone=backbone_xception, cfg=cfg)
- # Optimizer
- # Paper Page 4. We continue training with 1e-2 for 75 epochs, then 1e-3 for 30 epochs, and finally 1e-4 for 30 epochs.
- lr_schedule = tf.keras.optimizers.schedules.ExponentialDecay(
- initial_learning_rate=FLAGS.init_lr,
- decay_steps=FLAGS.lr_decay_steps,
- decay_rate=FLAGS.lr_decay_rate,
- staircase=True,
- )
- optimizer = tf.optimizers.Adam(learning_rate=lr_schedule)
- # Checkpoint
- ckpt = tf.train.Checkpoint(step=tf.Variable(0), model=yolo)
- ckpt_manager = tf.train.CheckpointManager(
- ckpt,
- directory=ProjectPath.VOC_CKPTS_DIR.value,
- max_to_keep=5
- )
- latest_ckpt = tf.train.latest_checkpoint(checkpoint_dir=ProjectPath.VOC_CKPTS_DIR.value)
- latest_ckpt_log = '\n' + '=' * 60 + '\n'
- if latest_ckpt:
- ckpt.restore(latest_ckpt)
- latest_ckpt_log += f'* Load latest checkpoint file [{latest_ckpt}]'
- else:
- latest_ckpt_log += '* Training from scratch'
- latest_ckpt_log += ('\n' + '=' * 60 + '\n')
- logger.info(latest_ckpt_log)
- print(colored(latest_ckpt_log, 'magenta'))
- # Val Metrics
- val_metrics = {'mAP_best': 0.}
- # Training
- train()
-
- def train():
- for epoch in range(1, FLAGS.epochs+1):
- train_ds = voc.get_train_ds(shuffle=True, drop_remainder=True, sample_ratio=FLAGS.train_ds_sample_ratio)
- steps_per_epoch = len(train_ds)
- train_log_handler = TrainLogHandler(total_epochs=FLAGS.epochs, steps_per_epoch=steps_per_epoch, optimizer=optimizer, logger=logger)
- for step, batch_data in enumerate(train_ds, 1):
- batch_imgs, batch_labels = prep_voc_data(batch_data, input_height=cfg.input_height, input_width=cfg.input_width, val=False)
- losses = train_step(yolo, optimizer, batch_imgs, batch_labels, cfg)
- train_log_handler.logging(epoch=epoch, step=step, losses=losses, tb_writer=tb_train_writer)
- if epoch % FLAGS.val_step == 0:
- validation(epoch=epoch)
-
-
- def validation(epoch):
- val_ds = voc.get_val_ds(sample_ratio=FLAGS.val_ds_sample_ratio)
- val_log_handler = ValLogHandler(total_epochs=FLAGS.epochs, logger=logger)
- val_losses_raw = {
- 'total_loss': tf.keras.metrics.MeanTensor(),
- 'coord_loss': tf.keras.metrics.MeanTensor(),
- 'obj_loss': tf.keras.metrics.MeanTensor(),
- 'noobj_loss': tf.keras.metrics.MeanTensor(),
- 'class_loss': tf.keras.metrics.MeanTensor(),
- }
- img_id = 0
- val_preds = list()
- for step, batch_data in tqdm.tqdm(enumerate(val_ds, 1), total=len(val_ds), desc='Validation'):
- batch_imgs, batch_labels = prep_voc_data(batch_data, input_height=cfg.input_height, input_width=cfg.input_width, val=True)
- yolo_output_raw = yolo(batch_imgs, training=False)
- # ====== ====== ====== Calc Losses ====== ====== ======
- batch_losses = {
- 'total_loss': 0.,
- 'coord_loss': 0.,
- 'obj_loss': 0.,
- 'noobj_loss': 0.,
- 'class_loss': 0.,
- }
- for i in range(len(yolo_output_raw)):
- one_loss = get_losses(one_pred=yolo_output_raw[i], one_label=batch_labels[i], cfg=cfg)
- batch_losses['total_loss'] += one_loss['total_loss']
- batch_losses['coord_loss'] += one_loss['coord_loss']
- batch_losses['obj_loss'] += one_loss['obj_loss']
- batch_losses['noobj_loss'] += one_loss['noobj_loss']
- batch_losses['class_loss'] += one_loss['class_loss']
- val_losses_raw['total_loss'].update_state(batch_losses['total_loss'] / len(batch_imgs))
- val_losses_raw['coord_loss'].update_state(batch_losses['coord_loss'] / len(batch_imgs))
- val_losses_raw['obj_loss'].update_state(batch_losses['obj_loss'] / len(batch_imgs))
- val_losses_raw['noobj_loss'].update_state(batch_losses['noobj_loss'] / len(batch_imgs))
- val_losses_raw['class_loss'].update_state(batch_losses['class_loss'] / len(batch_imgs))
- # ====== ====== ====== mAP ====== ====== ======
- yolo_boxes = yolo_output2boxes(yolo_output_raw, cfg.input_height, cfg.input_width, cfg.cell_size, cfg.boxes_per_cell)
- for i in range(len(yolo_boxes)):
- output_boxes = box_postp2use(yolo_boxes[i], cfg.nms_iou_thr, 0.)
- if output_boxes.size == 0:
- img_id += 1
- continue
- for output_box in output_boxes:
- *pts, conf, cls_idx = output_box
- cls_name = VOC_CLS_MAP[cls_idx]
- val_preds.append([*map(round, pts), conf, cls_name, img_id])
- img_id += 1
-
- voc_ap = CalcVOCmAP(labels=val_labels, preds=val_preds, iou_thr=0.5, conf_thr=0.0)
- ap_summary = voc_ap.get_summary()
- val_losses = dict()
- for loss_name in val_losses_raw:
- val_losses[loss_name] = val_losses_raw[loss_name].result().numpy()
- val_losses_raw[loss_name].reset_states()
- val_log_handler.logging(epoch=epoch, losses=val_losses, APs=ap_summary, tb_writer=tb_val_writer)
- # ========= Tensorboard Image: prediction output visualization =========
- # Training data output visualization
- sampled_voc_imgs, _ = prep_voc_data(train_viz_batch_data, input_height=cfg.input_height, input_width=cfg.input_width, val=True)
- sampled_voc_preds = yolo(sampled_voc_imgs)
- sampled_voc_output_boxes = yolo_output2boxes(sampled_voc_preds, cfg.input_height, cfg.input_width, cfg.cell_size, cfg.boxes_per_cell)
- sampled_imgs_num = FLAGS.tb_img_max_outputs if len(sampled_voc_imgs) > FLAGS.tb_img_max_outputs else len(sampled_voc_imgs)
- pred_viz_imgs = np.empty([sampled_imgs_num, cfg.input_height, cfg.input_width, 3], dtype=np.uint8)
- for idx in range(sampled_imgs_num):
- img = sampled_voc_imgs[idx].numpy()
- labels = box_postp2use(pred_boxes=sampled_voc_output_boxes[idx], nms_iou_thr=cfg.nms_iou_thr, conf_thr=cfg.conf_thr)
- pred_viz_imgs[idx] = viz_pred(img=img, labels=labels, cls_map=VOC_CLS_MAP)
- tb_write_imgs(
- tb_train_writer,
- name=f'[Train] Prediction (confidence_thr: {cfg.conf_thr}, nms_iou_thr: {cfg.nms_iou_thr})',
- imgs=pred_viz_imgs,
- step=epoch,
- max_outputs=FLAGS.tb_img_max_outputs,
- )
- # Validation data output visualization
- sampled_voc_imgs, _ = prep_voc_data(val_viz_batch_data, input_height=cfg.input_height, input_width=cfg.input_width, val=True)
- sampled_voc_preds = yolo(sampled_voc_imgs)
- sampled_voc_output_boxes = yolo_output2boxes(sampled_voc_preds, cfg.input_height, cfg.input_width, cfg.cell_size, cfg.boxes_per_cell)
- sampled_imgs_num = FLAGS.tb_img_max_outputs if len(sampled_voc_imgs) > FLAGS.tb_img_max_outputs else len(sampled_voc_imgs)
- pred_viz_imgs = np.empty([sampled_imgs_num, cfg.input_height, cfg.input_width, 3], dtype=np.uint8)
- for idx in range(sampled_imgs_num):
- img = sampled_voc_imgs[idx].numpy()
- labels = box_postp2use(pred_boxes=sampled_voc_output_boxes[idx], nms_iou_thr=cfg.nms_iou_thr, conf_thr=cfg.conf_thr)
- pred_viz_imgs[idx] = viz_pred(img=img, labels=labels, cls_map=VOC_CLS_MAP)
- tb_write_imgs(
- tb_val_writer,
- name=f'[Val] Prediction (confidence_thr: {cfg.conf_thr}, nms_iou_thr: {cfg.nms_iou_thr})',
- imgs=pred_viz_imgs,
- step=epoch,
- max_outputs=FLAGS.tb_img_max_outputs,
- )
- # ========= ================================================ =========
- # Save checkpoint and pb
- if ap_summary['mAP'] >= val_metrics['mAP_best']:
- ckpt_manager.save(checkpoint_number=ckpt.step)
- yolo.save(filepath=VOC_PB_DIR, save_format='tf')
- val_metrics['mAP_best'] = ap_summary['mAP']
- ckpt_log = '\n' + '=' * 100 + '\n'
- ckpt_log += f'* Save checkpoint file and pb file [{VOC_PB_DIR}]'
- ckpt_log += '\n' + '=' * 100 + '\n'
- logger.info(ckpt_log)
- print(colored(ckpt_log, 'green'))
- ckpt.step.assign_add(1)
- if __name__ == '__main__':
- app.run(main)
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