| 摘要 |
When processing an image it is often necessary to combine parts of its matrix mathematically, e.g. to multiply a part of this matrix with a given weighting function. In this context scalar products of vectors are important operations. The invention provides a coding procedure wherein two of the elements of two vectors are transformed to one encoded element, respectively, and are then stored. This has the result that the calculation of the scalar product requires two encoding operations of the elements and one multiplication of the encoded elements. When calculating another scalar product with at least partly the same elements the encoding operations of a number of elements are already done and the stored encoded elements can be used. This has the consequence that the calculation of this other scalar product requires at least partly no encoding operations but only multiplications of the stored encoded elements.
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