SEMI-TRANSPARENT EMBEDDED WATERMARKS

A watermark image may be generated that includes a first set of encoded pixels each of which is assigned a first transparency value and a second set of encoded pixels each of which is assigned a second transparency value, the second transparency level being different from the first transparency level. The encoded pixels may be distributed among a set of blank pixels such that each encoded pixel neighbors one or more blank pixels in the watermark image, and in particular at least two blank pixels in the watermark image. Herein, each blank pixel may be assigned the second transparency value. Thewatermark image may be overlaid and blended over a background source image to create an encoded source image. A decoder system may recover encoded information from the encoded source image. 可以生成水印图像，该水印图像包括第一组编码像素和第二组编码像素，第一组编码像素中的每一个被分配第一透明度值，第二组编码像素中的每一个被分配第二透明度值，第二透明度级别不同于第一透明度级别。编码像素可以分布在一组空白像素之间，使得每个编码像素与水印图像中的一个或多个空白像素相邻，具体地，与水印图像中的至少两个空白像素相邻。这里，每个空白像素可以被分配第二透明度值。水印图像可以覆盖和混合在背景源图像上，以创建经编码的源图像。解码器系统可以从编码的源图像恢复编码信息。