Dont change the meaning rewrite the following paragraph：The input feature map is first divided into R cardinal groups and split attention operation is performed on those features Finally the features

The initial step involves partitioning the input feature map into R distinct groups, which are then subjected to a split attention operation. Following this, the features of each group are merged to create a feature map that matches the size of the input. This feature map is subsequently combined with the input via a bottleneck in the neck.