| 摘要 |
<p>The present invention relates to a blind code insertion technique and extraction method which captures a digital broadcasting image, extracts a blind code on broadcasting information from the captured image, and displays the additional information of products which are shown on a digital broadcasting image from the extracted code. The present invention is to detect the blind code information and the location of an object image. For this, a detection process is performed without an original digital broadcasting image by inserting a PN-sequence into a blind code in the low frequency band by using discrete wavelet conversion. The present technique can obtain robustness even in various tests for securing the robustness of a blind code signal and detect the blind code from a seriously impaired digital broadcasting image.</p> |
