Patent ID: 8565554
Filing Date: 2013-10-22
Classification: G06F,G06T,G09G

Abstract:
1. A computer-implemented process for resizing a digital image, comprising: using a computer to perform the following process actions: inputting an original image which is to be resized according to a prescribed image scaling factor f, wherein the original image comprises an array of pixels having a particular pixel resolution, and each pixel comprises a luminance value; re-sampling the original image according to f, resulting in an initial resized image; generating a probability of text (POT) map for the initial resized image, wherein the POT map specifies a POT value for each pixel in the initial resized image, each of said POT values estimating the probability of the associated pixel being either a text pixel or a graphics pixel, and each of said POT values being determined using a luminance value histogramming procedure; generating a weighting factor (WF) map which maps each different smoothed POT value to a particular WF value, said generating comprising, using the WF map to calculate an adjusted luminance value for each pixel in the initial resized image, resulting in a final resized image.