1. An article of manufacture for authorized distribution of multimedia content comprising a non-transitory machine-readable medium having stored thereon instructions adapted to be executed by a processor, the instructions which, when executed, results in the processing comprising:
receiving at least one copy of content to be imperceptibly encoded with at least one digital watermark;
encoding the digital watermark into one or more locations in the content utilizing a key associated with a plurality of functions describing how the digital watermark is to be encoded and
detecting at least one digital watermark using the key.
2. The article of manufacture of claim 1, wherein said key is selected from the group comprising: a random key; a pseudo-random key; a candidate key; a watermark key; a watermarking key; a private key; a public key; a semiprivate key; a master framework key; and, a digital watermark key.
3. The article of manufacture of claim 1, wherein the encoded at least one digital watermark is associated with title, ownership, payment, distribution parameters, or uniquely identifiable information.
4. The article of manufacture of claim 1, wherein the encoded at least one digital watermark is integral with the encoded content.
5. The article of manufacture of claim 1, wherein a plurality of digital watermarks is encoded into one or more locations in the content.
6. The article of manufacture of claim 5, wherein at least one of the plurality of digital watermarks is accessible by a separate key.
7. The article of manufacture of claim 5, wherein each of the pluarilty of digital watermarks is encoded using separate keys.
8. The article of manufacture of claim 1, wherein at least one of the plurality of functions is upgradeable.
9. The article of manufacture of claim 1, further comprising an processor to generate information to identify the key used for encoding.
10. The article of manufacture of claim 1, further comprising a processor to generate information to reduce the computational expense to identify a key in a likely set of keys corresponding to the at least one key utilized in the encoding step.
11. The article of manufacture of claim 10, wherein the processor is bound by one of either heuristics or search scoring to reduce computational expense.
12. The article of manufacture of claim 1, further comprising a detector to detect or decoder the encoded at least one digital watermark.
13. A system for authorizing content comprising:
a receiver to receive a potentially watermarked signal;
a selector to select a portion of the potentially watermarked signal to detect a digital watermark; and,
a processor to determine the contents of the detected digital watermark with a key comprising at least one access privilege to the contents of the detected digital watermark.
14. The system of claim 13, wherein the detected digital watermark is hashed, encrypted, time stamped or signed.
15. The system of claim 13, wherein the detected digital watermark is authenticated, certified or verified by a third party to authorize the corresponding encoded content.
16. The system of claim 13, wherein said key is selected from the group of keys comprising: a random key; a candidate key; a pseudo-random key; a watermark key; a watermarking key; a private key; a public key; a semiprivate key; a master framework key; and, a digital watermark key.
17. The system of claim 13, wherein a plurality of digital watermarks are encoded in the potentially watermarked signal.
18. The system of claim 17, wherein each of the plurality of the digital watermarks is accessible using separate keys.
19. The system of claim 18, wherein said separate keys are selected from the group comprising: a random key; a candidate key; a pseudo-random key; a watermark key; a watermarking key; a private key; a public key; a semiprivate key; a master framework key; and, a digital watermark key.
20. The system of claim 13, wherein the key describes how the digital watermark is encoded in the potentially watermarked signal.
21. An article of manufacture for authorizing content comprising a non-transitory having stored thereon instructions adapted to be executed by a processor, the instructions which, when executed, results in the process comprising:
receiving a potentially watermarked signal;
selecting a portion of the potentially watermarked signal to detect a digital watermark; and,
determining the contents of the detected watermark with a key comprising at least one access privilege to the contents of the detected digital watermark.
22. The system of claim 13, wherein one of the key, the digital watermark, or both the key and digital watermark comprise information to upgrade the system.
23. A device for authorizing distribution of multimedia content comprising:
a receiver for receiving at least one copy of content to be imperceptibly encoded with at least one digital watermark;
an encoder for encoding the digital watermark into one or more locations in the content utilizing a key associated with a plurality of functions describing how the digital watermark is to be encoded; and
a detector to detect or decode at least one digital watermark using a key.
24. The device of claim 23, wherein said key is selected from the group comprising: a random key; a pseudo-random key; a candidate key; a watermark key; a watermarking key; a private key; a public key; a semiprivate key; a master framework key; and, a digital watermark key.
25. The device of claim 23, wherein the encoded at least one digital watermark is associated with title, ownership, payment, distribution parameters, or uniquely identifiable information.
26. The device of claim 23, wherein the encoded at least one digital watermark is integral with the encoded content.
27. The device of claim 23, wherein a plurality of digital watermarks is encoded into one or more locations in the content.
28. The device of claim 27, wherein at least one of the plurality of digital watermarks is accessible by a separate key.
29. The device of claim 27, wherein each of the plurality of digital watermarks is encoded using separate keys.
30. The device of claim 23, wherein at least one of the plurality of functions is upgradeable.
31. The device of claim 23, further comprising a processor to generate information to identify the key used for encoding.
32. The device of claim 23, further comprising a processor to generate information to reduce the computational expense to identify a key in a likely set of keys corresponding to the at least one key utilized in the encoding step.
33. The device of claim 32, wherein the processor is bound by one of either heuristics of search scoring to reduce computational expense.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A system for generating a reconstruction of an object of interest, comprising
a shape model generator (1) for generating a shape model representing a shape of the object in dependence on a plurality of projections of the object; and
a reconstructor (2) for reconstructing the object, based on the projections, in dependence on the shape model to obtain the reconstruction of the object.
2. The system according to claim 1, wherein the reconstructor (2) comprises a clipping subsystem (3) for clipping an outside of the object from the reconstruction, based on the shape model.
3. The system according to claim 1, wherein the reconstructor (2) is arranged for reconstructing only an inside andor boundary of the object as defined by the shape model.
4. The system according to claim 3, wherein the reconstructor (2) comprises a back-projection reconstructor arranged for back-projecting the projection images only to voxels of the reconstruction which belong to the inside andor a boundary region of the object as defined by the shape model.
5. The system according to claim 1, wherein the reconstructor comprises
a soft-tissue reconstructor (4) for generating a reconstruction favoring soft tissue, based on the plurality of projections; and
a sparse reconstructor (5) for generating a reconstruction of sparse objects, based on the plurality of projections.
6. The system according to claim 5, wherein the soft-tissue reconstructor (4) is arranged for performing a back-projection or an iterative reconstruction on the basis of a regularization favoring soft tissue, andor the sparse reconstructor (5) is arranged for performing an iterative reconstruction on the basis of a regularization which favors sparse objects.
7. The system according to claim 5, wherein the reconstructor (2) further comprises a reconstruction combiner (6) for combining the soft-tissue reconstruction and the sparse reconstruction into a combined reconstruction showing the soft tissue with enhanced visualization of the sparse objects.
8. The system according to claim 1, wherein the object comprises at least part of an organ of a subject.
9. The system according to claim 8, wherein the object further comprises skin surface.
10. A medical workstation, comprising the system according to claim 1.
11. A medical image acquisition apparatus, comprising a scanner for acquiring projections, and a system according to claim 1.
12. A method of generating a reconstruction of an object of interest, comprising
generating (202) a shape model representing a shape of the object in dependence on a plurality of projections of the object; and
reconstructing (203) the object, based on the projections, in dependence on the shape model to obtain the reconstruction of the object.
13. A computer program product comprising instructions for causing a processor system to perform the method according to claim 12.