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如果你想把 MMYOLO 修改为自己的项目,请遵循下面的约定。

关于图片 shape 顺序的说明

在OpenMMLab 2.0中, 为了与 OpenCV 的输入参数相一致,图片处理 pipeline 中关于图像 shape 的输入参数总是以 (width, height) 的顺序排列。 相反,为了计算方便,经过 pipeline 和 model 的字段的顺序是 (height, width)。具体来说在每个数据 pipeline 处理的结果中,字段和它们的值含义如下:

  • img_shape: (height, width)

  • ori_shape: (height, width)

  • pad_shape: (height, width)

  • batch_input_shape: (height, width)

Mosaic 为例,其初始化参数如下所示:

@TRANSFORMS.register_module()
class Mosaic(BaseTransform):
    def __init__(self,
                img_scale: Tuple[int, int] = (640, 640),
                center_ratio_range: Tuple[float, float] = (0.5, 1.5),
                bbox_clip_border: bool = True,
                pad_val: float = 114.0,
                prob: float = 1.0) -> None:
       ...

       # img_scale 顺序应该是 (width, height)
       self.img_scale = img_scale

    def transform(self, results: dict) -> dict:
        ...

        results['img'] = mosaic_img
        # (height, width)
        results['img_shape'] = mosaic_img.shape[:2]
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