Document enhancement system and method

1. A method, comprising:

receiving, by a first server and from a capture device, an image from a rendered document captured by the capture device;

identifying, by operation of the first server and from a corpus of documents, a first document that corresponds to the image, wherein identifying the first document comprises accessing a document index of the corpus of documents that is indexed based on document contents, and determining that the first document contains one or more textual elements of the image;

providing, by the first server and to the capture device, a document identifier for the first document;

receiving, by a second server and from the capture device, a request for an enhancement package for the first document, wherein the request includes the document identifier for the first document, wherein the enhancement package includes multiple enhancements associated with multiple portions of the first document, wherein each enhancement of the multiple enhancements corresponds to a respective portion of the multiple portions of the first document and comprises media configured for presentation by a presentation device in response to capturing the respective portion of the rendered document by the capture device and locating within the enhancement package the enhancement corresponding to the respective portion; and

in response to the request, selecting the enhancement package for the first document by the second server based at least in part on the document identifier, and providing the one or more enhancements by the second server to the capture device.

2. The method of claim 1 , wherein the media comprises an audio presentation, a video presentation, or an image presentation.

3. The method of claim 1 , wherein the first server and the second server are different servers.

4. The method of claim 1 , further comprising:

receiving, by the second server and from the capture device, a capture device identifier, wherein the enhancement package for the first document is selected by the second server based at least in part on the capture device identifier.

5. The method of claim 1 , wherein identifying the first document that corresponds to the image comprises:

generating a first digest of one or more textual elements in the image, and

determining from data associating documents with digests that the first document is associated with a digest that matches the first digest.

6. A system comprising one or more computers, the one or more computers comprising:

a first server configured to perform first operations comprising:

receiving from a capture device an image from a rendered document captured by the capture device,

identifying, from a corpus of documents, a first document that corresponds to the image, wherein identifying the first document comprises accessing a document index of the corpus of documents that is indexed based on document contents, and determining that the first document contains one or more textual elements of the image, and

providing a document identifier for the first document to the capture device; and

a second server configured to perform second operations comprising:

receiving, from the capture device, a request for an enhancement package for the first document, wherein the request includes the document identifier for the first document, wherein the enhancement package includes multiple enhancements associated with multiple portions of the first document, wherein each enhancement of the multiple enhancements corresponds to a respective portion of the multiple portions of the first document and comprises media configured for presentation by a presentation device in response to capturing the respective portion of the rendered document by the capture device and locating within the enhancement package the enhancement corresponding to the respective portion, and

in response to the request, selecting the enhancement package for the first document based at least in part on the document identifier, and providing the one or more enhancements to the capture device.

7. The system of claim 6 , wherein the media comprises an audio presentation, a video presentation, or an image presentation.

8. The system of claim 6 , wherein the first server and the second server are different servers.

9. The system of claim 6 , wherein:

the second operations further comprise

receiving, from the capture device, a capture device identifier, and

selecting the one or more enhancements based at least in part on the capture device identifier.

10. The system of claim 6 , wherein identifying the first document that corresponds to the image comprises:

generating a first digest of one or more textual elements in the image, and

determining from data associating documents with digests that the first document is associated with a digest that matches the first digest.