This PR fixes an unintended consequence of PR15 which added NIfTI method 1 to the existing method 2. The specification describes Method 0 for the case where neither the sform or qform is specified. Here is an example of such a dataset. One could argue that an image which does not specify either a qform or sform is necessarily ambiguous with regards to the direction of the dimensions and the origin, so only the voxel size is specified.
This PR fixes an unintended consequence of PR15 which added NIfTI method 1 to the existing method 2. The specification describes Method 0 for the case where neither the sform or qform is specified. Here is an example of such a dataset. One could argue that an image which does not specify either a qform or sform is necessarily ambiguous with regards to the direction of the dimensions and the origin, so only the voxel size is specified.