Patent Document ID: 20140270460
Application ID: 14352302
Patent Status: 0

Claim One:
1. A method for identifying a paper-like medium, comprising: acquiring a group of pixel grayscale values of an image of an inputted paper-like medium, wherein the group of pixel grayscale values is a set of grayscale values of sampling pixels in a region of the inputted paper-like medium; acquiring an average of all pixel grayscale values in the group of pixel grayscale values as a first average grayscale value; comparing the first average grayscale value with an aging threshold to determine an aging level of the inputted paper-like medium; acquiring a stain depth for each of N regions of the inputted paper-like medium, wherein the N is an integer greater than or equal to 1; and determining a stain level of the inputted paper-like medium according to the stain depth, the area and a stain threshold of each of the N regions, the stain threshold being associated with the aging level.