I noticed with interest your article [Scientist Barrie Schwortz] with the excerpt from the CAN [=Catholic News Agency] story that quotes Dr. Barrie Schwortz saying that lights and darks on the image correlate to cloth to body distance. I agree with you, however, permit me this.
What Dr. Schwortz says is an unfortunate example of an assumption masquerading as a fact. He is repeating something that seems to have originated with Dr. John Jackson et alia around 1976. It has become one of the most often repeated statements about the Shroud’s image. Unfortunately it is not true.
Dr. Colin Berry has clearly demonstrated that the lights and darks (lighter and darker shades) in a photograph of a death mask can represent three-dimensional information. [See ImageJ plot below]. When Dr. Schwortz says that photographs don’t have that kind of information, he is wrong. They might have it. And if photographs might have it, so can artworks such as paintings, relief rubbings and imprints. In the case of the death mask photograph, it was a matter of how diffused light played out on the shape of the face.
Dr. Berry also demonstrated the encoding of three-dimensional information in an image with thermal imprinting. In that case it seems to be the result of different amounts of pressure between a piece of linen and a hot statue.
Clearly, no one should be telling a reporter, “photographs don’t have that kind of information, artworks don’t.” It simply is not true.
No one should tell a reporter, “The only way that can happen is by some interaction between cloth and body.” It simply is not true.
And no one should tell a reporter there is a “correlation between image density – lights and darks on the image – and cloth to body distance.” It simply is not true.
In fairness to Barrie, I used to say those very same things about the 3D. It is one of those many things about the shroud images that warrant reexamination and new thinking. The problem is bigger than what gets said in the press. It is believing possibly incorrect information and blinding ourselves to new avenues of thinking about the images. I still think the data is real 3D data. I’m just NOT persuaded that cloth to body distance is a valid assumption.
Note 1: Barrie is not a “Dr.” But by all rights, he is Dr. Schwortz in my book.
Note 2: It was Joseph Accetta who proposed that the death mask photograph might contian 3D information. Colin confirmed it. This is discussed in an earlier posting, PowerPoint presentation put together by Joseph Accetta. It is too bad that Colin wasn’t in St. Louis when Joe Accetta was.