    def __init__(self,
                 ch_in,
                 ch_out,
                 filter_size,
                 padding,
                 norm_type,
                 freeze_norm=False,
                 name='',
                 data_format='NCHW'):
        """
        CoordConv layer
        Args:
            ch_in (int): input channel
            ch_out (int): output channel
            filter_size (int): filter size, default 3
            padding (int): padding size, default 0
            norm_type (str): batch norm type, default bn
            name (str): layer name
            data_format (str): data format, NCHW or NHWC
        """
        super(CoordConv, self).__init__()
        self.conv = ConvBNLayer(
            ch_in + 2,
            ch_out,
            filter_size=filter_size,
            padding=padding,
            norm_type=norm_type,
            freeze_norm=freeze_norm,
            data_format=data_format,
            name=name)
        self.data_format = data_format
CoordConv layer
Args:
ch_in (int): input channel
ch_out (int): output channel
filter_size (int): filter size, default 3
padding (int): padding size, default 0
norm_type (str): batch norm type, default bn
name (str): layer name
data_format (str): data format, NCHW or NHWC
ptstructure/layout/ptppyolov2/ppyolov2_yolo_fpn.py