In my opinion the postulated and fitted halo is more a result of wishful thinking,
than careful, meticulous and objective analysis without preconceived ideas. — O.K.
Contrary to Peter Schumacher claims, after analysing BW photos of the Shroud I see no compelling evidence (and definitely not "beyond any reasonable doubt") for the presence of the postulated halo around Shroud face. According to my analysis there are no significant differences of intensity in the region around the face, compared to other non-image, non-burn areas (even if some regions around the face appear minimally darker than average background), not to say about any circular-shape „halo” around the face. In my opinion the postulated and fitted halo is more a result of wishful thinking, than careful, meticulous and objective analysis without preconceived ideas.
This does not mean that I reject Wilson and others theory that the Mandylion transferred to Constantinople in 944 was actually the Shroud. In my view, the analysis of documentary evidence created after the transfer leaves practically no room for other conclusion. This is another topic, however. Yet also I think that the history of the Mandylion, as both concept and physical object(s), and its relation to the Shroud is far more complex than most researchers assume and current theories do not give full answers for all questions and issues.