초록 ▼

The detection process or mechanism reads each of the watermark and compares their characteristics. While wear and handling may change the characteristics of the digital watermarks in a document, the relationship between the characteristic of multiple digital watermarks in a document will never-the-l

The detection process or mechanism reads each of the watermark and compares their characteristics. While wear and handling may change the characteristics of the digital watermarks in a document, the relationship between the characteristic of multiple digital watermarks in a document will never-the-less give an indication as to whether a document is an original or a copy of an original.

대표청구항 ▼

[ We claim:] [1.]1. A method of creating a watermarked image which comprises the steps of:modifying an HSI (hue, saturation, Intensity) representation of an image to imbed a first watermark in said image and create a first watermarked image,transforming said first watermarked image to the RGB (red,

[ We claim:] [1.]1. A method of creating a watermarked image which comprises the steps of:modifying an HSI (hue, saturation, Intensity) representation of an image to imbed a first watermark in said image and create a first watermarked image,transforming said first watermarked image to the RGB (red, green, blue) color space, biasing the values which represent a second watermark toward a particular color,modifying said HSI values to imbed said biased second watermark in said image and create a second watermarked image,transforming said second watermarked image to the RGB color space, andcombining the values of said first and second watermarked images to create a final watermarked image.