Abstract
Transformational methods of picture encoding, expand the signal realization on a certain orthogonal basis with subsequent pixel-wise quantization of the resultant signal representation coefficients. Supplementing transformational encoding by encoding a sequence of coefficient magnitudes in a decreasing order of magnitudes results in a two-stage transformational encoding method. When this method is applied to two-dimensional pictures, the method approximates the sequence of transform coefficient magnitudes as a decreasing function which is parametrically described by very few numbers. By using cosine transformation a reduction to 1.0 - 1.5 bit/pixel was achieved.
Original language | English |
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Pages (from-to) | 546-547 |
Number of pages | 2 |
Journal | IEE Conference Publication |
Issue number | 307 |
State | Published - 1989 |
Externally published | Yes |
Event | Third International Conference on Image Processing and its Applications - Coventry, Engl Duration: 18 Jul 1989 → 20 Jul 1989 |