How do I access the kernel_height from Blob in a function?

[acgtyrant]

I want to use the Fully Convolution Network, so I find the #1976 and start to factory it to make a new pull request. However, I find the original protected variable kernel_height and kernel_weight is replaced by Blob<int>::shape_[2] and Blob<int>::shape_[3] in vision_layer.h. So I have to change the function declaration:

template <typename Dtype>
DiagonalAffineMap<Dtype> FilterMap(const int kernel_h, const int kernel_w,
    const int stride_h, const int stride_w, const int pad_h, const int pad_w) 

But I find the Blob<int>::shape_ is a protected variable, I can not access it immediately, so any idea? Declare the function as friend? Thank you!

[acgtyrant]

I find some useful functions like shape(int axes) in blob.hpp, sorry for that I make a stupid question.