Install libnifti-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libnifti-doc
NIfTI library API documentation
Niftilib is a set of i/o libraries for reading and writing files in the NIfTI-1 data format. NIfTI-1 is a binary file format for storing medical image data, e.g. magnetic resonance image (MRI) and functional MRI (fMRI) brain images. . This package provides the library API reference documentation.