| 摘要 |
<p>A method and circuitry for correcting discreet values transmitted in blocks. Circuitry performs at least one multiplication as of matrixes to obtain at least one product value having a plurality of digits, while limiting the number of digits. The correction value is then added to the product value. In the preferred embodiment, multiplication is of matrixes representing blocks of chromaticity or gray values by a transformation matrix and the multiplication produces matrixes in the frequency region. In this embodiment, only a single correction value is calculated, which is added to the mean value element of the matrix obtained by the multiplication and which corresponds to a multiple of the arithmetic mean of all of the elements of the image region matrix.</p> |
