This is the header of the function vil_crop, in the file vil_crop.h:
//: Create a view which is a cropped version of src.
// Doesn't modify underlying data. O(1).
// \relates vil_image_view
// \return an n_i x n_j window of im with offset (x0,y0)
inline vil_image_view<T> vil_crop(const vil_image_view<T> &im, unsigned i0,
unsigned n_i, unsigned j0, unsigned n_j)
Shouldn't the last documentation line end with "offset (i0, j0)"?
Crístian Deives dos Santos Viana [aka CD1]
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