Affine transformation device for fractal image coding

摘要

The present invention proposes an affine transform apparatus for encoding a fractal image, and receives an image data (D) of NX1, a first transform coefficient (A) of NXN, and a second transform coefficient (B) of NX1. And an affine transformation device for fractal image encoding which performs affine transformation of the image data D according to equation W = A * D + B and outputs affine transformation data W obtained by the transformation. (D) or selectively receive the data W2 of NX1 and output the start signal S, which is an additional information indicating the input of the image data D, to the image data D. A selector to output the first transform coefficient A of the NXN, and multiplies the first transform coefficient A of the NXN data and the first control signal C1 provided by the selector; In response, a matrix for outputting the data W1 of NX1 obtained as a result of the multiplication; The multiplier receives the second transform coefficient B of NX1, adds the data W1 of NX1 and the second transform coefficient B of NX1 provided from the matrix multiplier, and adds the result. The matrix adding part for outputting the obtained data of NX1 W2 and the data W2 of NX1 provided from the matrix adding part are recorded, and in response to the second control signal C2, the data of the recorded NX1 is recorded. The convergence degree of the register section for outputting (W2) as the affine transformation data (W) and the data W2 of NX1 provided from the matrix addition section is determined according to a predetermined calculation formula, and the data of the NX1 ( When the degree of convergence of W2) is out of the preset range, the control unit outputs the first control signal C1, and in the opposite case, outputs the second control signal W2.