It was also quite a shock to see how much more subtle the image is to the eye in natural light. The nature of any image reproduction process tends to accentuate the inherent contrast of the image. When copies of the Shroud are reproduced there is an even greater tendency to accentuate contrast to enable the viewer to perceive the image easily. All ordinary computer screens vary in their contrast so I cannot predict what may actually be seen on any individual screen but I have tried to recreate an image that can be downloaded here: http://we.tl/YG9iVXHwyD that more faithfully shows the actual colours. The background cloth is almost ivory and the image, even for someone as used to seeing its photographs as I am, is barely perceptible and – close up – is almost impossible to decipher.
However, as we well know, once “unlocked” by photography, so much more depth and contour becomes readily seen.
If you have an LCD monitor, try to look at it perpendicularly and try to size the face as close to real-life as possible.