We are running an online-press media-library. On this site many brands are uploading images and track press users download and views per image. But some brand now want to add unique code in image so they can track their own images.
We tried some steganography tools:
- http://www.outguess.org/info.php (support JPG)
- http://www.imagemagick.org/Usage/transform/#stegano (support PNG)
Both works fine, but issue is that secure code disappeared after image resize or crop.
Simple way would be watermark, but we don't want to disturb images, because images are being used in press printing.
Is there any way to put secure code in JPG format image and track that code after resize or cropping of that image?
Our brands want to publish them as web image(light version), so press users could use images on blog and forums.
We will target press blog / forum site from crawler engine(~4500 blogs) and check if our image exist on these blogs.