We introduce a new technology for lossy compression of continuous tone images and video sequences. The Normal Forms representation is based on picture decomposition in the geometric domain and is composed of two parts: background and superimposed elements (normal forms) capturing low scale picture details. This representation provides a very high compression ratio, with minimal or no visual degradation; it allows for instantaneous application of image processing operations on compressed data or during the compression process; it is inherently extendable to video sequences compression.
"Normal forms representation: a technology for image compression", Proc. SPIE 1903, Image and Video Processing, (8 April 1993); doi: 10.1117/12.143128; https://doi.org/10.1117/12.143128