Methods to evaluate images, video and documents
The present invention relates generally to steganographic encoding and/or digital watermarking. In one embodiment, a method is provided including: obtaining an image or video; encoding a first steganographic component in the image or video, wherein the first steganographic component comprises a first set of properties that are designed to be affected in a first manner when transformed from a first color gamut to a second color gamut; and encoding a second steganographic component in the image or video, wherein the first steganographic component comprises a second set of properties that are designed to be affect in a second manner when transformed from the first color gamut to the second color gamut. Other implementations and embodiments are provided and claimed as well.
1. A method comprising:
obtaining an image or video;
encoding a first steganographic component in the image or video, wherein the first steganographic component comprises a first set of properties that are designed to be affected in a first manner when transformed from a first domain to a second domain; and
encoding a second steganographic component in the image or video, wherein the first steganographic component comprises a second set of properties that are designed to be affected in a second manner when transformed from the first domain to the second domain.
2. The method of claim 1 wherein the first set of properties comprises a signal to noise ratio.
3. The method of claim 1 wherein the second set of properties comprises a signal to noise ratio.
4. The method of claim 1 wherein the second set of properties comprises a signal bias.
5. The method of claim 1 wherein the first set of properties or the second set of properties comprises a power level.
6. The method of claim 1 wherein the first set of properties or the second set of properties comprise at least one property associated with pixels.
7. The method of claim 6 wherein the one property comprises pixel alignment.
8. The method of claim 6 wherein the second set of properties comprises a random assignment of pixels.
9. The method of claim 1 wherein the first set of properties or the second set of properties comprise at least one property associated with grain.
10. The method of claim 1 wherein the first domain or the second domain comprises a transform frequency domain.
11. The method of claim 1 wherein the first domain comprises a first color gamut and the second domain comprises a second color gamut.
12. A method comprising:
obtaining an image or video;
hiding a first component in the image or video, wherein the first component is designed to change in a first manner when transformed from a first domain to a second domain; and
hiding a second component in the image or video, wherein the second component is designed to change in a second manner when transformed from a first domain to a second domain.
13. The method of claim 12 wherein the first domain or the second domain comprises a transform frequency domain.
14. The method of claim 12 wherein the first domain comprises a first color gamut and the second domain comprises a second color gamut.
15. The method of claim 12 wherein said acts of hiding are accomplished with digital watermarking.
16. A method comprising:
obtaining an image or video, the image or video including a first component and a second component hidden therein, wherein the first component is hidden to change in a first manner when transformed from a first domain to a second domain, and the second component is hidden to change in a second manner when transformed from the first domain to the second domain;
analyzing properties associated with the first component and the second component;
determining from at least said act of analyzing whether the image or video has undergone a transformation from the first domain to the second domain.
17. The method of claim 16 wherein the properties comprise a signal to noise ratio.
18. The method of claim 16 wherein the properties comprise a signal bias.
19. The method of claim 16 wherein the properties comprise a power level.
20. The method of claim 16 wherein the properties comprises a random assignment of pixels.
21. The method of claim 16 wherein the first domain or the second domain comprises a transform frequency domain.
22. The method of claim 16 wherein the first domain comprises a first color gamut and the second domain comprises a second color gamut.