Patent ID: 6850624
Filing Date: 2005-02-01
Classification: G06T,H04N

Abstract:
1. A data embedding apparatus for embedding data into image data, having a color information storing region for storing information of colors used in an image in association with respective index numbers corresponding thereto, and a pixel information storing region for storing one of said index numbers in association with each pixel of the image, said data embedding apparatus comprising: means for dividing said color information storing region into a plurality of subregions in which color values and the order in which the color values are stored are identical for each subregion, and for editing the color values and color value order in said color information storing region such that the respective subregions maintain mutually identical color values and color value order; means for defining a bit value corresponding to each of said subregions; and means for selecting a color existing in said pixel information storing region corresponding to one of the bit values as embedded data, for each pixel stored in said pixel information storing region.