We are running online press media library, in 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 own images.
We tried some steganography tools:
- http://ift.tt/1GsIrOQ (support JPG)
- http://ift.tt/1GsIpXs (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?
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