Concepedia

O. Johnsen

OJ

Statistics

Publications

7

Citations

174

H-Index

7

Active since

1976

Affiliations

École Polytechnique Fédérale de Lausanne(Current)

O. Johnsen is an author at École Polytechnique Fédérale de Lausanne specializing in coding theory, digital imaging, and data compression.

Publications per year

1976–2004

7

Publications

7

On the redundancy of binary Huffman codes (Corresp.)

O. Johnsen · IEEE Transactions on Information Theory · 1980 · 55 citations

Engineering, Computer Science, Mathematics +13

Coding of Two-Level Pictures by Pattern Matching and Substitution

O. Johnsen, Jakub Segen, Glenn L. Cash · Bell System Technical Journal · 1983 · 39 citations

Computing, Computer Science, Computer Graphics +11

A technique for the efficient coding of the upper bands in subband coding of images

O. Johnsen, O.V. Shentov, Sushmita Mitra · International Conference on Acoustics, Speech, and Signal Processing · 2002 · 29 citations

Engineering, Electrical Engineering, Computer Vision +16

Adaptive block scheme for source coding of black-and-white facsimile

Frédéric de Coulon, O. Johnsen · Electronics Letters · 1976 · 19 citations

Engineering, Computer Engineering, Computer Science +14

An Extension of the CCITT Facsimile Codes for Dithered Pictures

O. Johnsen, Arun N. Netravali · Bell System Technical Journal · 1981 · 11 citations

Computing, Computer Engineering, Computer Science +17

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