MinIoURandomCrop augmentation in d2go for detection models

Summary:
X-link: https://github.com/fairinternal/detectron2/pull/589

X-link: facebookresearch/detectron2#4702

Pull Request resolved: #443

Add MinIoURandomCrop augmentation, compare model performance.
Example of aug
{F822053068}{F822053066}{F822053051}
Data overhead is around 0.04 sec
without aug {F822053812}
with aug {F822053818}

Reviewed By: zechenghe

Differential Revision: D41804643

fbshipit-source-id: 8f13f98fa8132378a803534b59e892fbc1b3058c

Author: ynonaolga

d2go/data/dataset_mappers/d2go_dataset_mapper.py

@@ -104,6 +104,11 @@ def _original_call(self, dataset_dict):
             # pass additional arguments, will only be used when the Augmentation
             #   takes `annotations` as input
             inputs.annotations = dataset_dict["annotations"]
+            inputs.boxes = [
+                utils.get_bbox(obj)
+                for obj in dataset_dict["annotations"]
+                if obj.get("iscrowd", 0) == 0
+            ]
             # Crop around an instance if there are instances in the image.
             if self.crop_gen:
                 crop_tfm = utils.gen_crop_transform_with_instance(

d2go/data/transforms/d2_native.py

@@ -27,6 +27,7 @@
     "RandomResize": d2T.RandomResize,
     "FixedSizeCrop": d2T.FixedSizeCrop,
     "ResizeScale": d2T.ResizeScale,
+    "MinIoURandomCrop": d2T.MinIoURandomCrop,
 }
 
 
@@ -118,6 +119,13 @@ def ResizeScaleOp(
     return build_func(cfg, arg_str, is_train, name="ResizeScale")
 
 
+@TRANSFORM_OP_REGISTRY.register()
+def MinIoURandomCropOp(
+    cfg: CfgNode, arg_str: Optional[str], is_train: bool
+) -> List[aug.Augmentation]:
+    return build_func(cfg, arg_str, is_train, name="MinIoURandomCrop")
+
+
 # example repr: FixedSizeCropOp::{"crop_size": [1024, 1024]}
 @TRANSFORM_OP_REGISTRY.register()
 def FixedSizeCropOp(