Patent ID: 6307569
Filing Date: 2001-10-23
Classification: G06T

Abstract:
A method for enlarging a digital image comprising:selecting an initial image having a size N.times.N;determining a low frequency portion and a high frequency portion of the initial image;defining a model image having fixed bounds for each pixel therein;estimating a final image having a size pN.times.pN;determining a low frequency portion and a high frequency portion of the estimated final image;determining a pN.times.pN FFT;replacing the low frequency portion of the estimated final image with the low frequency portion of the initial image to form an intermediate estimated image; andmodifying the intermediate estimated image by I-FFT to form a modified estimated image, correcting each pixel in the modified estimated image by a corresponding pixel in the model image to limit variation from the model image until the pixels of a final image are within the bounds of the model image.