AN WATERMARKING METHOD FOR DIGITAL CONTENTS USING DIGITAL HOLOGRAPHY

摘要

PURPOSE: A watermarking method of digital content which uses a digital hologram is provided to satisfy non-visibility without the deformation of a digital content image due to an inserted watermark. CONSTITUTION: A hologram mark generating unit converts a depth image watermark into a digital hologram(S10). A wavelet converting unit filters a content image into four images by a sub band(S20). A hologram mark inserting unit converts one image by sub band into the hologram mark(S30). A comparing unit confirms the insertion of the watermark by comparing an inserted hologram mark with an original hologram mark(S40).