Patent ID: 6263120
Filing Date: 2001-07-17
Classification: G06T

Abstract:
An image-data interpolation processing method comprising:extracting a partial objective image from an input image;converting the extracted partial objective image into frequency data;dividing a frequency-conversion coefficient matrix equivalent in size to the frequency-converted partial objective image into plural frequency domains;calculating mean values of coefficients of the respective frequency domains;discriminating whether the partial objective image includes an edge-portion according to the mean values of the respective frequency domains determined by the calculating step;interpolating the partial objective image by selectively applying one of the predetermined interpolation processes according to the result by the discriminating step; andwherein the converting step uses a discrete cosine transformation and the calculating step includes processing for dividing an alternating current component of the coefficient of the discrete cosine transformation at matched horizontal and vertical positions in a matrix in a direction from a low-frequency component to a high-frequency component.