METHOD AND DEVICE FOR THE TRANSFORMATION AND METHOD AND DEVICE FOR THE REVERSE TRANSFORMATION OF IMAGES

摘要

Disclosed are a method and device for the transformation and a method and device for the reverse transformation of images. According to one embodiment of the present invention, the method for the transformation of images involves acquiring a reduced transformation matrix by selecting a predetermined frequency domain for the frequency transformation of an MxN input block and by then selecting elements for generating a transformation coefficient corresponding to the frequency domain which was selected from among the elements of the MxN transformation matrix used in the frequency transformation of the MxN input block, and involves generating a transformation coefficient corresponding to the selected frequency domain by carrying out frequency transformation in which the reduced transformation matrix is applied to the MxN input block.