(PECL imagick 2, PECL imagick 3)
Imagick::steganoImage — Hides a digital watermark within the image
Hides a digital watermark within the image. Recover the hidden watermark later to prove that the authenticity of an image. Offset defines the start position within the image to hide the watermark.
watermark_wand
offset
成功時(shí)返回 true。