7. A system for image-based retrieval and rendering, the system comprising: a first physical device comprising hardware, the first device extracting a plurality of distinctive local descriptors from the content of a digital image; a second physical device comprising hardware, the second device indexing a set of digitally-stored documents by extracting a plurality of distinctive local descriptors from the content of each document in the set; a third physical device comprising hardware, the third device matching the digital image against the set of digitally-stored documents by using near-duplicate image detection to compare corresponding distinctive local descriptors of the digital image and each document in the indexed set, wherein near-duplicate image detection comprises using locality-sensitive hashing; a fourth physical device comprising hardware, the fourth device retrieving a digitally-stored document from the set of digitally-stored documents that matches the digital image, the retrieved digitally stored document comprising a composite of images of a plurality of articles in a defined layout, wherein each of the plurality of articles has a corresponding article layout; a fifth physical device comprising hardware, the fifth device retrieving, after the digital image is matched and the digitally-stored document is retrieved, from the composite of images, one article from the plurality of articles that corresponds to the digital image based on overlapping areas associated with the plurality of articles, wherein for each article of the plurality of articles, the overlapping area is between the boundary of the corresponding article layout of the article and the boundary of the complete digital image, the retrieved article having the greatest overlapping area among the overlapping areas; and a sixth physical device comprising hardware, the sixth device rendering the retrieved article for output to a user device, wherein rendering includes at least one of: converting the retrieved article to text and converting the text to speech, and converting the retrieved article for Braille output.
7. A system for image-based retrieval and rendering, the system comprising: a first physical device comprising hardware, the first device extracting a plurality of distinctive local descriptors from the content of a digital image; a second physical device comprising hardware, the second device indexing a set of digitally-stored documents by extracting a plurality of distinctive local descriptors from the content of each document in the set; a third physical device comprising hardware, the third device matching the digital image against the set of digitally-stored documents by using near-duplicate image detection to compare corresponding distinctive local descriptors of the digital image and each document in the indexed set, wherein near-duplicate image detection comprises using locality-sensitive hashing; a fourth physical device comprising hardware, the fourth device retrieving a digitally-stored document from the set of digitally-stored documents that matches the digital image, the retrieved digitally stored document comprising a composite of images of a plurality of articles in a defined layout, wherein each of the plurality of articles has a corresponding article layout; a fifth physical device comprising hardware, the fifth device retrieving, after the digital image is matched and the digitally-stored document is retrieved, from the composite of images, one article from the plurality of articles that corresponds to the digital image based on overlapping areas associated with the plurality of articles, wherein for each article of the plurality of articles, the overlapping area is between the boundary of the corresponding article layout of the article and the boundary of the complete digital image, the retrieved article having the greatest overlapping area among the overlapping areas; and a sixth physical device comprising hardware, the sixth device rendering the retrieved article for output to a user device, wherein rendering includes at least one of: converting the retrieved article to text and converting the text to speech, and converting the retrieved article for Braille output. 11. The system of claim 7 , wherein the sixth device rendering the retrieved article for output to a user device further includes converting the retrieved article for visual display.