if these images are truly scientific, then the unexplained screams out to be explained.

eVeritas: News for the Faculty and Staff of the University of Miami , reports that a 3D Exhibition on Shroud of Turin Visits Campus April 14:

UM’s Catholic Campus Ministry, along with the Franciscans of Mary, Missionaries of Gratitude, will present the 3D-hologram exhibit, “The Holy Shroud—the Burial Cloth of Christ,” and a lecture by its creator at 8 p.m. on Monday, April 14, on the University Center Patio. At the event, which is open to students, faculty, and staff, Dutch scientist Petrus Soons will present his scientific research on the images of Christ on the shroud. For more information on Soons and the history and creation of the Holy Shroud of Turin in 3D, visit http://shroud3d.com/. For more information on the event, please contact Michelle Ducker at michelle@ucatholic.org or Lourdes Wolf Marenus at lwolf@miami.edu.

As some of you know, I certainly have real reservations about Petrus Soons’ 3D work., that statement being the title of a posting from November 2012 in which I wrote what follows (below the line).

Bernardo Galmarini, “the 3D expert that produced the conversion from 2D to 3D,” writes on the shroud3d site [which is Petrus Soons’ site]:

I thought at first, that in this more scientific conversion, the hidden information in the Shroud (3D information in the gray-scale), would be a nuisance or obstacle to produce a human representation of the face, and that I would have to struggle continuously against this. Strangely enough, this hidden scientific information in the Shroud became the key and the basis for this work, reducing my artistic work to only softening the “holes” and deformities (caused surely by the passing of time) and the adapting to what this scientific version commands you to do: filling in and normalizing the “holes” or “dead areas” in the hidden information of the linen. For example: the areas without information in the forehead have been corrected following the surrounding gray-scale with coherent information and with a normal human forehead in mind. This process was helped by the fact, that the central zone of the forehead and the bony structure of the orbits contain very coherent information and that of course was taken as a guideline.

That statement lacks needed clarity. There are certainly holes and deformities. Why is not clear in most cases. It seems completely unjustified to speculate that these are caused by the passing of time. Without knowing how the image was formed, without knowing much about how the shroud was stored or displayed over many centuries, we shouldn’t make such guesses.

Exactly what are the holes and deformities? They have not been detailed on the website. The bloodstains certainly are a problem and to make adjustments for these is perhaps warranted. But what about other deformities? How is the problem of banding addressed? Banding, a variegated background pattern to the cloth, perhaps the result of how the thread of the cloth was bleached and having nothing to do with the passing of time, is certainly the single biggest deformity that exists. It gets peculiar treatment in this new 3D work. The left side of the face (our right) has been partially retouched to minimize the effect. The other side of the face is shaped as though there was no banding but the banding remains. Pictured here is an estimate of the banding in the area of the face.

At the bottom of the beard and the lower areas of the hair, darker areas that are not the result of banding are strikingly evident. These relatively dark areas don’t recede towards the background as expected for grayscale plotting. (You can’t see this without 3D glasses. Don’t even try.) What is the rationale for this obviously apparent artistic adjustment? Moreover, hair above the forehead pompadours frontward without grayscale tones to support it. This hair and facial hair treatment seems artistic.

The entire head and shoulders seem to be completely detached from the background. You can, with 3D glasses on, move your own head ever so slightly and see detached movement. (Again, you can’t see this without 3D glasses.) Galmarini speaks of “hidden scientific information,” presumably but not explicitly the grayscale. I can’t find any data in support of this phenomenon. It seems as though an artificial outline has been introduced around the human form. There does not seem to be any such outline on the Shroud. In fact, researchers, over the years, have noted this lack of outline because it is something that an artist, had an artist created the Shroud, would have certainly included. Interestingly, the areas of the lower neck and upper shoulders, though darker than the background, don’t recede into the background and don’t show detached movement. Most amazingly, the lower part of a prominent water stain above the face is now worn in the hair like a miniature yarmulke while the upper part of the stain adorns the background. This, to my way of thinking, strongly suggests the use of false outlines. What other reason can there be other than to enhance the 3D effect?

The most surprising thing is that the grayscale tones that to the untrained eye look like highlights and shadows, but that in fact become the basis for plotting three-dimensionality, remain in place in the plotted image. If you plot a three-dimensional object from the grayscale density you should have something that looks like a stone statue. Whatever highlights and shadows seem to exist in any resulting computerized virtual-reality image should only be from artificially introduced light placed at a calculated angle and distance in the virtual world. This is what the VP8 Analyzer does and what other software packages such as POV-Ray do. But in the anaglyph in question, it looks as though the original image was stretched like a thin film over the calculated shape. Original highlights, shadows and even herringbone twill patterns are there.

I’m willing to be convinced that I am wrong, that the anaglyph in question is scientific. I would actually like this. If this were so we would have something that is truly amazing. Clarity is needed, however. Specifics are required. I would like to see how much of this conversion to 3D is reproducible in a scientific sense and how much is "only softening the ‘holes’ and deformities."

In order to claim that the 3D images on this site are scientific the steps and procedures must be reproducible by others, at least in theory. Documentation is needed.

We should know the software or algorithm used to plot the image including any variables or settings used. The terminology “hidden scientific information” should be clarified. It is essential to understand how plotting software uses this data. Expose higher resolution images for examination if the work was done in higher resolution. While this image may be 800 pixels wide, the resolution is no better than 72 ppi. Ordinary books carry pictures at four times the number of pixels per inch. We should be able to see, in anaglyph form for comparison, the unadjusted, scientifically plotted part of the project so that we can judge for ourselves just how much of the final product is by way of adjustment. All adjustments made should be explained and justified.

It bothers me to think that these images will be used, as the pastor suggests, in presentations to show the 3D characteristics of the Shroud. These images are certainly being displayed in churches, in exhibits and on the internet without the qualification that this is art and not science. If that is so, it is most unfortunate.

On the other hand, if these images are truly scientific, then the unexplained screams out to be explained.

Don’t get me wrong. There is 3D data in the Shroud’s images. It is the most important quality for knowing that these are not images formed by reflected light as a painter would envision or a camera would capture a human form. The 3D data is a quality that must be accounted for in any hypothesis attempting to explain how the images were formed, be it miraculously, naturally, by fakery or even as honest art. Indeed, this quality, treated scientifically without various forms of electronic manipulation, sooner or later, may suggest how the images were formed.