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HANS DEHLINGER ON FIBO

GENERATIVE ART AND ITS HISTORY

Hans Dehlinger (*1939, Germany) began working with programming languages and computers in the early 1960s during his studies in architecture at the University of Stuttgart (Dipl.Ing.). He continued his education at the University of California, Berkeley (M.Arch., Ph.D.), where he also worked as an environmental planner and architect. In 1980, he became Professor of Industrial Design at the University of Kassel, Germany, where he taught until his retirement in 2004.

He studied architecture in Stuttgart where Max Bense lectured at the "Studium Generale," a gathering of students from various faculties. The focus was on exploring concrete poetry, language types, and the essence of art itself. Bense advocated replacing the term "art" with "aesthetic event" to avoid loaded connotations. Bense illustrated this concept with a metal figure that dissolved in acid, challenging perceptions of art. These lectures delved into defining art, sparking intense discussions among diverse listeners. Despite the allure of computational art with Frieder Nake, personal responsibilities kept him focused on his architectural studies at the time.

In the early 1980s, he began to explore computers artistically, with a focus on algorithmically generated line drawings. The majority of his generative artwork is based on procedures and computer code executed on pen plotters. It thus has aspects of both electronic and physical art. The lines can form delicate structures, dense textures, or even evoke an “unsharp” impression from sharp lines.

In conversation with Anika Meier, Hans Dehlinger discusses his first long-form generative art project titled FIBO, derived from the name of the mathematician Fibonacci. With FIBO, Dehlinger explores the relationship between mathematical order and aesthetic beauty. The well-known Fibonacci sequence, characterized by each number being the sum of the previous two, serves as the foundation for this exploration. By incorporating the hypothetical concept that order contributes to beauty in artistic creations, Dehlinger aims to generate an infinite number of aesthetic events akin to those envisioned by Max Bense. Key parameters of the program, including grid and line numbers, utilize the Fibonacci sequence to experiment with the fusion of mathematical order and artistic expression.

Anika Meier: When and how did you learn to code?

Hans Dehlinger: I first learned how to code in the early 1960s, when I was enrolled as a student of Architecture at the Technische Hochschule in Stuttgart, Germany.

Before entering the TH, I worked as a certified craftsman (cabinetmaker). Due to a historical change in the educational system it became possible for me to enter the Technische Hochschule in Stuttgart by attending and passing a 3-year preparatory system. I was grateful to be given this opportunity.

Computers were already around, but a Computer Center did not yet exist. An ALGOL programming class for engineering students was offered by the Institute of Numerical Mathematics, and I enrolled in it for a semester.

This was my first experience with a computer-programming language. I applied it to a small design project by programming a combinatorial system of design parameters. Today I would call this a "morphology". It caused a huge discussion among my professors and became a lifelong unforgotten, important beginning of sorts for me. But that's a different story of its own.

At the time, me and my fellow architecture students (we were a class of 80) were immersed in this academic setting without being aware of how unique it was. In the early 1960s, the Technische Hochschule in Stuttgart was a hotspot – worldwide – for Computer Art and in other aspects as well. From today’s perspective, this is a historical fact, but we lived in it without quite realizing it.

Hans Dehlinger, Fibo #86, algorithm (still), 2024. In the collection of thefunnyguys.

AM: Over the last couple of years, you got interested in learning more about generative art on the blockchain. What has surprised you the most?

HD: It has surprised me the most over the last couple of years that art, in addition to all the manifold formats in which we encounter it, could now also exist as an entirely digital entity.

AM: You were keen on exploring the possibilities to release generative art on the blockchain yourself and therefore learned a new programming language. How was the experience of learning a new programming language at the age of 84? Was it difficult?

HD: It has been interesting, surprising, and exciting to see completely new formats for generative art emerge through blockchain technology. Of course, the emergence of new art forms has happened throughout art history.

Designing an art piece for the blockchain and releasing it is undoubtedly a significant step for an artist. Given my age, I am very happy to be able to participate and create in this very contemporary art format. New ideas are already coming to mind, which may lead to further explorations in this direction.

Many programming languages I learned in the past are no longer in use. Therefore, I have learned new ones since my days with ALGOL, and it has become somewhat normal. Learning a new programming language is (and has always been) an effort, but it is also a pleasure to delve into this type of work to expand one’s toolkit. While I may be getting slower now, there is no age limit to learning a new programming language.

Hans Dehlinger, Fibo, algorithm (still), 2024.

AM: Let’s take a deep dive into FIBO. What does the name stand for?

HD: FIBO are the first four letters of the name of the Italian mathematician FIBONACCI (born around 1170). The well-known Fibonacci sequence (0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, etc.) is a sequence of numbers where the next number is the sum of the previous two numbers. As frequently found in mathematics, a distinct law is responsible for the "order" in such a sequence. According to Kirchhoff, Order over Complexity, mathematically O/C (if it can be calculated) could provide an "aesthetic measure."

A simple formula to calculate beauty is not known, to my knowledge. But, as a working hypothesis, we can follow this concept by assuming that some kind of order, if present, may contribute to beauty in an aesthetic object. Mathematics is full of structures with "order of some kind," and if we succeed in transforming this order somehow artistically into an object, we may succeed in creating an "aesthetic event" in the sense of Max Bense. 

FIBO is an experiment in this direction. Significant parameters the program uses for creating images, such as the underlying grid and the number of lines in each "aesthetic event," follow the Fibonacci sequence.

AM: How did you approach working on the project? Is there a historical project of yours FIBO is connected to?

HD: I have worked with the Fibonacci sequence for many years and on very different topics. A quick search showed works back to 2010, but older projects may be in my files.

Hans Dehlinger, Fibo_3B, 16 x 16 cm, plotter drawing, pencil on paper, 2013.
Hans Dehlinger, Fibo_a1.2, 16 x 16 cm, plotter drawing, pencil on paper, 2013.
Hans Dehlinger, Fibo_D2_rot-2016, from a series of algorithmic drawings from python programs to which color (by judgment, not by algorithm) was applied, 116 x 127 cm, print on Forex, 2016.
Hans Dehlinger, D2_02 [fuzzy fibonacci], 19 x 19 cm, digital print on archival paper, 2016.
Hans Dehlinger, Fibonacci_fragment_10, 2018.
Hans Dehlinger, M02-1, 2018.
Hans Dehlinger, CodeF01_MUD, 2024.

HD: Compared to these earlier works, FIBO is exclusively digital and also includes motion for the first time. When viewing it, one can see how the program explores the endless possibilities of generating "aesthetic events" based on the underlying mathematical rules and with the help of another basic mathematical concept: randomness.

AM: How did you select the colors for FIBO?

HD: The color scheme of each individual event within FIBO is a combination of a background color, which is, with the exception of black, which occurs more often, randomly selected from the full RGB color spectrum, and a color spectrum for the layers.

There are a number of different basic colors that serve as spectrum for the layers. If, let’s say, the spectrum is determined to be grayscale, then the shading of each layer will be determined randomly within that scale.

It took some experimentation to arrive at the current colors. For example, I initially included an increased likelihood for white backgrounds as well, but those events often had an "unfinished" look to them, as if a canvas had not been fully painted. So I took them out, but they can still appear (with a very small probability) as part of the RGB spectrum.

Hans Dehlinger, Fibo #37, algorithm (still), 2024. In the collection of Roope Rainisto.

AM: You visited Shanghai earlier this year to attend the opening of your first solo show in China at MUD Gallery. They exhibited your historical plotter drawings and your most recent explorations of generative art in the digital realm. How do you feel when you see your historical work in an exhibition while you continue to explore new artistic territories?

HD: The exhibition in Shanghai was a real highlight. As you know, we—me as artist and you as curator—were originally approached by MUD Gallery for a show of historic plotter drawings. A few weeks before the opening, we were offered the opportunity to use a total of 13 screens that are installed in the gallery in addition, some of them several meters high.

It was great that we could show new, exclusively electronic works on these screens in addition to the historical works in the show. I felt it definitely created a more complete overall impression.

When I think of this show, I am filled with gratitude in so many aspects—going back to when I was a student even. I’m lucky to have had teachers at the university who inspired me and suggested to me what and how to learn. I was in China multiple times to give lectures and workshops after I became a teacher myself, and some of my colleagues, friends, and students from those times came to the opening in Shanghai—some from far away.

The artworks were presented with extraordinary care at the gallery, which is located in a huge, light-filled space in a gallery quarter. I was also really lucky that I could travel at all, since I had fallen off a ladder and landed myself in the hospital only a few weeks earlier.

And last but not least, thank you, Anika—the show wouldn’t have been possible without you!

Hans Dehlinger's solo exhibition LINE ART at MUD Gallery in Shanghai, 9 March – 9 May 2023.

AM: How does it feel after all these years to be recognized as an artist?

HD: It feels good, but it can also be distracting and doesn't help with focus.

AM: What are your plans?

HD: My plan is to stay healthy and fit to be able to continue my work and further explore the universe of generative art.

AM: Thank you for taking the time to discuss FIBO!

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