Affine transformation device for fractal image coding

摘要

The present invention proposes an affine transform apparatus in fractal image coding. The apparatus receives an image data D of NX1, a first transform coefficient A of NXN, and a second transform coefficient B of NX1 , An affine transformation device for performing fractal transformation of the image data (D) according to the expression W = A * D + B and outputting the affine transformation data (W) obtained by the transformation, (D) or NX1 data (W2), and selectively outputs the data (D2), when the start signal (S), which is additional information indicating the input of the image data (D) Wherein the NXN receives the first conversion coefficient A and outputs the first conversion coefficient A of the NXN and the NX1 data provided from the selection unit in response to the first control signal C1, And outputting the data W1 of NX1 obtained as a result of the multiplication, And multiplies the data W1 of NX1 provided from the matrix multiplier and the second transform coefficient B of NX1 by receiving the second transform coefficient B of the NX1, (W2) of NX1 provided from the matrix plus section and outputs the data W2 of the recorded NX1 (W2) in response to the second control signal (C2) W2) to the affine transformation data (W), and a degree of convergence of the data (W2) of NX1 provided from the matrix multiplier; and a degree of convergence of the data (W2) of the NX1 And a control unit for outputting the first control signal C1 in the case of exceeding the preset range and outputting the second control signal C2 in the opposite case and outputting the second control signal C2 in the opposite case .