Appearance vs. Reality

The checkershadow illusion is one of the more remarkable "illusions" I've encountered, that goes to the heart of how we (as visual information processors) interpret and categorize the world; it also goes to the heart of the question, "Are you really sure of what you are looking at?"

Believe it or not, the squares marked A and B are exactly the same shade of gray! If you do not immediately believe your senses (as I suspect you won't!), just copy/save the image to a jpeg file and use any image processing program to sample the actual luminosity of each square...truly amazing!).

The "explanation" is that our visual systems require more than just luminosity to assess the shade of grey to be assigned; it also needs such features as local contrast and boundary effects. A complete explanation is provided here.

The checkshadow illusion was devised by Edward H. Adelson, Professor of Vision Science in the Dept. of Brain and Cognitive Sciences, Massachusetts Institute of Technology. His site includes many other startling illusions that explore the nature of perception and interpretation of reality (see his Illusions and Demos), as well as technical papers explaining his theories and findings. Adelson's site is a must-see for all photographers who "believe" they know all there is to know about appearance, reality, and the true nature of tonal gradations.

Additional references (and illusions) appear on the
Perceptual Sciences Group homepage.

Cymatics: Revealing Nature's Hidden Patterns

Cymatics (from the Greek kyma, meaning "wave" and ta kymatica, meaning "matters pertaining to waves"), is the study of wave phenomena, pioneered by Swiss medical doctor and natural scientist Hans Jenny (1904-1972). Over the course of more than ten years, Jenny conducted landmark experiments pumping energy into, and animating, otherwise inert powders and liquids into life-like, flowing forms that mimic patterns found throughout nature, art and architecture. All of these patterns are a direct physical manifestation of pure tone vibration: dynamic form induced by material vibration.

Jenny's work builds upon much earlier work by Ernst Chladni who, in 1787, published "Discoveries Concerning the Theory of Music." This work introduced the basic physics of acoustics (the science of "sound"). One of Chladni's many practical (and aesthetic) discoveries was a way to make sound waves visible . By using a violin bow, stretched perpendicularly across the edge of flat plates covered with sand, he produced the patterns and shapes that today go by the term Chladni figures.

Jenny's work also overlaps a bit with the work of mathematician Nathaniel Bowditch, who was among the first to study the patterns generated by parametric sinusoidal waves called Bowditch curves, but are more often called Lissajous figures.

Apart from the incredible innate beauty of Jenny's patterns, there lies perhaps an even deeper, and deeply mysterious, "beauty" that has to do with the underlying patterns of nature. As Cathie E. Guzetta puts it so eloquently in "Music Therapy: Nursing the Music of the Soul"..."The forms of snowflakes and faces of flowers may take on their shape because they are responding to some sound in nature. Likewise, it is possible that crystals, plants, and human beings may be, in some way, music that has taken on visible form." You can read more in the article Cymatics: The Science of the Future.

More recently, work on oscillons has revealed many of the same mysterious features, including that of effective atomic and crytaline structures. The physics of "small" granular media (sand, powder, BBs from a toy shotgun,...) that sit between the microscopic (atomic) and macroscopic (and cosmic) is in its infancy. A great technical survey on oscillons: Patterns and Collective Behavior in Granular Media.

Camera Obscura

The camera obscura (Lat. dark chamber), the basic principles of which have been known since antiquity, is essentially just a box (which may be room sized: see discussion below) with a small hole on one side. Light passes through the hole and forms an image on the opposite wall (the sharpness of which depends on the size of the hole, and with very small holes leading to problems stemming from diffraction; as the hole becomes smaller, light sensitivity also naturally decreases).

The camera obscura has long been a favorite of artists because the artist can use the projected image as the base on which to draw; since the image is in perfect perspective, the realism of the rendered image is thus hightened. Pinhole cameras are camera obscuras with light-sensitive film.

Now we come to the reason for this Blog entry: to highlight the work of a master photographer - Cuban-born Abelardo Morell - who uses a room-size camera obscura to record wall-size images of Manhattan, New York, San Francisco, CA, and the cityscape of Havana, Cuba (among many other locations). Interested viewers are encouraged to explore Morell's complete Camera Obscura gallery.

His full (and extensive) on-line gallery of photographs (including some of his early work) can be viewed here. His most recent publications include Camera Obscura, and A Book of Books. See also Abelardo Morell (by Richard B. Woodward).

Local fused w/Global via Video Feedback

Talysis (a 9 min DVD, made for the Crystalpunk Workshop for Soft Architecture held in Utrecht, Holland in Autumn 2005) navigates the "possibility of a sentient geometry to produce a stream of geometric archetypes, a collective unconscious for emergent dynamical systems, a video feedback language system for scrying and pattern recognition."

This is not "new age" silliness;-), but rather a very serious attempt to, essentially, blur the distinction between local behaviors and rules, and global patterns. As Paul Prudence (the scientist/artist behind Talysis) describes on his site, the program combines aspects of symmetry with digital video feedback, resulting in highly recursive geometric structures, including ones that are eerily reminiscent of cellular automata patterns. Cellular automata (CA) are simple discrete dynamical systems whose agents (typically endowed with a discrete set of states, such as ON and OFF) evolve according to strictly local rules. Some CA (such as the well known two-dimensional Life rule, introduced by mathematician John Conway) are known to be universal computers, and so harbor a fundamentally irreducible level of complexity (see Wolfram's New Kind of Science).

What Prudence's Talysis shows is that video feedback can mimic the calculations of recursive algorithms; which begs the question whether it can also behave as a universal computer? (Prudence claims on his site that some patterns reproduce those of the Life rule, and conjectures that video feedback therefore can act as a computer).

Prudence says..."Many of the forms generated in Talysis appear to model biological morphogenesis and suggests that at the heart of all biological growth lies some degree of feedback of information to the system. At first glance many of the stills from Talysis might have been taken from an atlas of biology. There are neural networks, synapses, biological tissues, capillaries, plant structures, and embryonic forms. All of these images were arrived at from pointing a DV camera at its own output, they are entirely self-generative."

A quote from a classic paper on the space-time dynamics of video feedback (by James Crutchfield, published in Physica, 1984): "One goal in studying video feedback is to see whether it could be used as a simulator for dynamics in other fields. Turing’s original proposal of reaction-diffusion equations for biological morphogenesis comes to mind, as well as the image processing and hallucinogenic dynamics of the visual cortex."

I have always suspected that life-like "complexity" (true nested systems-of-systems autopoietic self-organized systems) lies at the Godelian-like cusp where local and global fuse; the Godelian-loop reaching into itself and pulling itself up to higher dimensions by its own bootstraps. Video feedback may just prove to be the practical/conceptual tool with which to visualize a bit of this fundmanetal bootstrapping. Absolutely fascinating!

Additional resources can be found at this link.

Microworlds

Hidden Beauty: Microworlds Revealed, by France Bourely, is one of the finest examples I've seen of a synergy of art and science (as well as a bit of philosophy); extraordinarily beautiful images of the microworld await the lucky reader who purchases this amazing book.

Some of the photographs (captured using a scanning electron microscope), if judged on a purely aesthetic level, arguably rank with some of the great abstract photographs that have ever been taken! Indeed, I am tempted to equate what Dr. Bourely has accomplished here to what Ansel Adams accomplished for the American West with his magnificent large format photography. What Adams represents for the macroscopic world, Dr. Bourely represents for the microscopic one. She is that good...as a guide, as a scientist, as photographer, and as a visionary artist of the highest caliber.

Quite simply this is one of the most beautiful books I've ever had the pleasure of owning and I shall treasure it for a long, long time to come. If you love photography, or science, or abstraction, or philosophy, or ever simply marvel at the ineffable mystery we call the universe, you owe it to yourself to get this book. It is destined to be a classic.

Space, Time, and Perception

The Hirshhorn Museum is currently exhibiting a career survey of Hiroshi Sugimoto (b. 1948, Tokyo), a master of using photography to explore the nature of space, time and perception. The exhibit runs between February 16, 2006 and May 14, 2006.

Sugimoto is known for his starkly minimalist, conceptual images of seascapes, movie theaters, natural history diaramas and architecture, that often border on the mystical. While, at one level, his images are "simple" (his seascapes for example sometimes offer little or no contrast between object and background at all!), at another, deeper level, they all compell the viewer to ponder such questions as "What is time?", "What is space?" and "What is real?"

According to the Hirshhorn site, the Smithsonian's Arthur M. Sackler Gallery will feature Hiroshi Sugimoto: History of History (from April 1, 2006 through July 30).

Here are two online galleries of some of Sugimoto's work (the first includes an interview with the photographer): Eyestorm & Robert Klein Gallery.

A generous sampling of his images (that require much time to slowly digest, emotionally, cognitively, and spiritually) appear in the book Hiroshi Sugamoto, by Kerry Brougher.

Harry Callahan: The Photographer at Work

Harry Callahan: The Photographer at Work, is a magnificent new book by Britt Salvesen (with an introduction by John Szarkowski) on the creative life of one of the 20th century's most creative photographic artists. It is so much more than a "mere" biography.

What sets this biography (which a generous sampling of Callahan's work) apart from other books in this genre, is its elegant focus on the creative aspects of photography. In discussing Callahan's dedication to constant experimentation, choice of subject matter, his visual approaches to a particular shot, selection of themes and improvisations, sequential ordering, and the all important print process, the book provides a rare invaluable resource to the inner reflections of an artist at work (and play). Callahan's lifelong body of work is testament to the fact that an artist need not travel to the ends of the earth to find beauty; beauty is not just in the eyes of the beholder, but in the dedication and loving attention to craft and creative experimention in one's backyard.

Bytes of Science

A good friend of mine, David Mazel, who is extremely well versed in science and engineering (indeed, he is making a comfortable living with a Ph.D. in Electrical Engineering), has a wonderfullly informative and entertaining site called Bytes of Science.

On it, you will find commentary and links to such topics as infinite minimal surfaces, satellite tracking, chaos for encryption, and video fly-bys of some of M.C. Escher's graphic works (among many others).

What makes the Blog special is David's passion for all things relating to math and science, and a unique gift for teaching and writing; you will likely not even notice how much serious math or science you've picked up while you're simply immersed in the shear pleasure of reading one of David's short passages. Highly recommended.

Gregory Bateson and "Seeing" with the Mind's Eye

Some of the most important basic lessons of learning to see in photography do not come directly from the masters of photography (though they obviously impart quite a bit of wisdom;-) For example, consider a deep lesson that is taught by anthropologist, Gregory Bateson...

Bateson was one of the last century’s most original thinkers. Trained as an anthropologist, Bateson made deep and lasting contributions to biology, cybernetics, and systems theory. He was also a gifted teacher. One of Bateson’s central ideas is that of the “Pattern that Connects,” or metapattern, which means, literally, a pattern of patterns.

This idea was first introduced in Bateson’s masterwork — Mind and Nature — in a story about how he sometimes pulled out a freshly cooked crab out of a bag and asked his students (who were typically nonscientists) to argue that the object represents the remains of a living being. The object of the Socratic exercise was to force his students to ponder the question, “What is the difference between the living and nonliving?” To answer this question, the students had to learn such concepts as relationship, symmetry and topology as they apply both within an organism (or object) and outside an organism (on higher levels). The deeper lesson was taking their first step toward appreciating the need for “discarding of magnitudes in favor of shapes, patterns, and relations.”

What does this have to do with photography and seeing? Well, one can begin by drawing a lesson from Bateson’s concept of metapatterns. A uniquely personal aesthetic grammar may be developed by following these three steps: (1) recognize that all conventional distinctions between objects are essentially arbitrary (i.e. learn to see the world as shape, pattern and relation rather than purely form), (2) draw your conscious attention to the visible boundaries between conventional forms that make up a photographic scene, and then (3) use your unconscious intuition to guide the camera, as a compositonal tool, to recompose the scene as if it were made up of visual elements of your own choosing. In short, decompose the world into its basic building blocks, then build it back up the way you really see it.

Another great book by Bateson (coauthored with his daughter Catherine Bateson, is Angels Fear: Towards An Epistemology Of The Sacred.

Photography and the Creative Process

Three exceptional new DVDs, released by Arte Video (and a coproduction of Arte France, KS Visions and The National Center for Photography), explore the creative process behind the works of some master photographers. Each DVD consists of about 10 short (10-15 min long) "essays" focusing on one photographer, using images (contact sheets, proofs, prints, or slides) with commentary by the artist himself. Together, these films provide an unparalleled excursion into the creative process of photography.

Contacts Volume 1: The Great Tradition of Photojournalism includes Henri Cartier-Bresson, William Klein, Raymond Depardon, Mario Giacomelli, Josef Koudelka, Robert Doisneau, Edduard Boubat, Elliot Erwitt, Marc Riboud, Leonard Freed, Helmut Newton, and Don McCullin.

Contacts Volume 2: The Renewal of Contemporary Photography includes Sophie Calle, Nan Goldin, Duane Michals, Sarah Moon, Nobuyoshi Araki, Hiroshi Sugimoto, Andreas Gursky, Thomas Ruff, Jeff Wall, Lewis Baltz, and Jean-Marc Bustamante.

Contacts Volume 3: Conceptual Photography includes John Baldessari, Bernd & Hilla Becher, Christian Boltanski, Alain Fleischer, John Hilliard, Roni Horn, Martin Parr, Georges Rousse, Thomas Struth, and Wolgang Tillmans.