add maskrcnn tutorial

dygraph/tutorials/train/instance_segmentation/mask_rcnn_r50_fpn.py

@@ -0,0 +1,54 @@
+import paddlex as pdx
+from paddlex import transforms as T
+
+# 下载和解压昆虫检测数据集
+dataset = 'https://bj.bcebos.com/paddlex/datasets/insect_det.tar.gz'
+pdx.utils.download_and_decompress(dataset, path='./')
+
+# 定义训练和验证时的transforms
+# API说明：https://github.com/PaddlePaddle/PaddleX/blob/release/2.0-rc/paddlex/cv/transforms/operators.py
+train_transforms = T.Compose([
+    T.RandomResizeByShort(
+        short_sizes=[640, 672, 704, 736, 768, 800],
+        max_size=1333,
+        interp='CUBIC'), T.RandomHorizontalFlip(), T.Normalize(
+            mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225])
+])
+
+eval_transforms = T.Compose([
+    T.ResizeByShort(
+        short_size=800, max_size=1333, interp='CUBIC'), T.Normalize(
+            mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225])
+])
+
+# 定义训练和验证所用的数据集
+# API说明：https://github.com/PaddlePaddle/PaddleX/blob/develop/dygraph/paddlex/cv/datasets/coco.py#L26
+train_dataset = pdx.datasets.CocoDetection(
+    data_dir='xiaoduxiong_ins_det/JPEGImages',
+    ann_file='xiaoduxiong_ins_det/train.json',
+    transforms=train_transforms,
+    shuffle=True)
+eval_dataset = pdx.datasets.CocoDetection(
+    data_dir='xiaoduxiong_ins_det/JPEGImages',
+    ann_file='xiaoduxiong_ins_det/val.json',
+    transforms=eval_transforms)
+
+# 初始化模型，并进行训练
+# 可使用VisualDL查看训练指标，参考https://github.com/PaddlePaddle/PaddleX/tree/release/2.0-rc/tutorials/train#visualdl可视化训练指标
+num_classes = len(train_dataset.labels)
+model = pdx.models.MaskRCNN(
+    num_classes=num_classes, backbone='ResNet50', with_fpn=True)
+
+# API说明：https://github.com/PaddlePaddle/PaddleX/blob/release/2.0-rc/paddlex/cv/models/detector.py#L155
+# 各参数介绍与调整说明：https://paddlex.readthedocs.io/zh_CN/develop/appendix/parameters.html
+model.train(
+    num_epochs=12,
+    train_dataset=train_dataset,
+    train_batch_size=1,
+    eval_dataset=eval_dataset,
+    learning_rate=0.00125,
+    lr_decay_epochs=[8, 11],
+    warmup_steps=10,
+    warmup_start_lr=0.0,
+    save_dir='output/mask_rcnn_r50_fpn',
+    use_vdl=True)

dygraph/tutorials/train/object_detection/faster_rcnn_hrnet_w18.py

@@ -42,7 +42,7 @@ eval_dataset = pdx.datasets.VOCDetection(
 num_classes = len(train_dataset.labels)
 model = pdx.models.FasterRCNN(num_classes=num_classes, backbone='HRNet_W18')
 
-# API说明：https://github.com/PaddlePaddle/PaddleX/blob/release/2.0-rc/paddlex/cv/models/detector.py#L154
+# API说明：https://github.com/PaddlePaddle/PaddleX/blob/release/2.0-rc/paddlex/cv/models/detector.py#L155
 # 各参数介绍与调整说明：https://paddlex.readthedocs.io/zh_CN/develop/appendix/parameters.html
 model.train(
     num_epochs=24,

dygraph/tutorials/train/object_detection/faster_rcnn_r50_fpn.py

@@ -43,7 +43,7 @@ num_classes = len(train_dataset.labels)
 model = pdx.models.FasterRCNN(
     num_classes=num_classes, backbone='ResNet50', with_fpn=True)
 
-# API说明：https://github.com/PaddlePaddle/PaddleX/blob/release/2.0-rc/paddlex/cv/models/detector.py#L154
+# API说明：https://github.com/PaddlePaddle/PaddleX/blob/release/2.0-rc/paddlex/cv/models/detector.py#L155
 # 各参数介绍与调整说明：https://paddlex.readthedocs.io/zh_CN/develop/appendix/parameters.html
 model.train(
     num_epochs=12,

dygraph/tutorials/train/object_detection/ppyolo.py

@@ -43,7 +43,7 @@ eval_dataset = pdx.datasets.VOCDetection(
 num_classes = len(train_dataset.labels)
 model = pdx.models.PPYOLO(num_classes=num_classes, backbone='ResNet50_vd_dcn')
 
-# API说明：https://github.com/PaddlePaddle/PaddleX/blob/release/2.0-rc/paddlex/cv/models/detector.py#L154
+# API说明：https://github.com/PaddlePaddle/PaddleX/blob/release/2.0-rc/paddlex/cv/models/detector.py#L155
 # 各参数介绍与调整说明：https://paddlex.readthedocs.io/zh_CN/develop/appendix/parameters.html
 model.train(
     num_epochs=405,

dygraph/tutorials/train/object_detection/ppyolotiny.py

@@ -43,7 +43,7 @@ eval_dataset = pdx.datasets.VOCDetection(
 num_classes = len(train_dataset.labels)
 model = pdx.models.PPYOLOTiny(num_classes=num_classes)
 
-# API说明：https://github.com/PaddlePaddle/PaddleX/blob/release/2.0-rc/paddlex/cv/models/detector.py#L154
+# API说明：https://github.com/PaddlePaddle/PaddleX/blob/release/2.0-rc/paddlex/cv/models/detector.py#L155
 # 各参数介绍与调整说明：https://paddlex.readthedocs.io/zh_CN/develop/appendix/parameters.html
 model.train(
     num_epochs=650,

dygraph/tutorials/train/object_detection/ppyolov2.py

@@ -47,7 +47,7 @@ num_classes = len(train_dataset.labels)
 model = pdx.models.PPYOLOv2(
     num_classes=num_classes, backbone='ResNet50_vd_dcn')
 
-# API说明：https://github.com/PaddlePaddle/PaddleX/blob/release/2.0-rc/paddlex/cv/models/detector.py#L154
+# API说明：https://github.com/PaddlePaddle/PaddleX/blob/release/2.0-rc/paddlex/cv/models/detector.py#L155
 # 各参数介绍与调整说明：https://paddlex.readthedocs.io/zh_CN/develop/appendix/parameters.html
 model.train(
     num_epochs=365,

dygraph/tutorials/train/object_detection/yolov3_darknet53.py

@@ -43,7 +43,7 @@ eval_dataset = pdx.datasets.VOCDetection(
 num_classes = len(train_dataset.labels)
 model = pdx.models.YOLOv3(num_classes=num_classes, backbone='DarkNet53')
 
-# API说明：https://github.com/PaddlePaddle/PaddleX/blob/release/2.0-rc/paddlex/cv/models/detector.py#L154
+# API说明：https://github.com/PaddlePaddle/PaddleX/blob/release/2.0-rc/paddlex/cv/models/detector.py#L155
 # 各参数介绍与调整说明：https://paddlex.readthedocs.io/zh_CN/develop/appendix/parameters.html
 model.train(
     num_epochs=270,