  There are currently many challenges related to three-dimensional (3D) surface
reconstruction using capsule endoscopy (CE) images. There are also challenges
related to viewing the content of reconstructed 3D surfaces. In this
preliminary investigation, the author focuses on the latter and evaluates their
effects on the content of reconstructed 3D surfaces using CE images. The
evaluation of such challenges is preliminarily conducted into two parts. The
first part focuses on the comparison of the content of 3D surfaces
reconstructed using both preprocessed and non-preprocessed CE images. The
second part focuses on the comparison of the content of 3D surfaces viewed at
the same azimuth angles and different elevation angles of the line-of-sight.
The experiments demonstrated the need for generalizable line-of-sight and
advanced CE image preprocessing means as well as further research in 3D surface
reconstruction.
