József Denes

Between 1964 and 1969, he was the head of the mathematical research group of the Central Physical Research Institute (KFKI). – From 1964, he was also an external collaborator of the Mathematical Research Institute of the Hungarian Academy of Sciences.

Between 1969 and 1988, he was the head of the Mathematics Laboratory (MAL) at the Computer Science Coordination Institute (SZKI); the Laboratory dealt with narrow and wideband image transmission and raster image processing. His individual research in this regard was related to error detection and error correction codes, as well as source coding.
He is credited with the development of the universal image digitizing device, the Colour Display Processor (CDP). In the 1970s, under his leadership, the Laboratory developed an image processing system suitable for processing space and aerial images, which was also used in space experiments.
The Unified Computing System (ESZR) was also the head responsible for research into digital audio and video processing and transmission in Hungary.
In 1979, he was in Japan as a UN expert.

He has made significant contributions to the applications of mathematics, especially in the fields of logical computer security and cryptography.
He is the author of more than a hundred scientific articles and three patents.

He was an invited lecturer and honorary associate professor at ELTE from 1964. He held special courses for mathematics students entitled Practical Applications of Algebra.
In 1976 and 1987 he was a visiting professor at the University of Wisconsin (Madison, (USA), and in 1989 he was a research professor at the University of Surrey (England). He was also an invited lecturer at other universities in Europe, the USA, Canada, Israel and Japan.

He retired from the SZKI in 1988 as an independent scientific advisor to the Institute. He worked as an independent advisor for government organizations and banks both in Hungary and abroad.

He was a member of the editorial boards of two Hungarian and one Polish scientific journals, and an external expert of the refereed journals Zentralblatt für Mathematik and Mathematical Reviews.
He was a member of the Bolyai János Mathematical Society, the American Mathematical Society, and the New York Academy of Sciences.