13. A system for selecting portions of an image for display on a computing device, the system comprising: a computer system; an interface of the computer system that is configured to receive a request from a computing device for a first electronic document that includes an image; means for determining coordinates of a plurality of portions of the image based on optical analysis of the image by the computer system, wherein the optical analysis identifies items in the image that are visually distinct from other items in the image; an image extractor of the computer system that is configured to use the determined coordinates to identify a plurality of sub-images of the image in a first arrangement, the plurality of sub-images corresponding to the plurality of portions; and a document generator of the computer system that is configured to generate a second electronic document that includes the plurality of sub-images in a second arrangement, the second arrangement being different than the first arrangement, wherein the second arrangement groups the plurality of sub-images based on one or more attributes of the sub-images, wherein the one or more attributes based upon which the sub-images are grouped in the second arrangement include image size and image shape; wherein the interface is further configured to provide the generated second electronic document to the mobile computing device.
13. A system for selecting portions of an image for display on a computing device, the system comprising: a computer system; an interface of the computer system that is configured to receive a request from a computing device for a first electronic document that includes an image; means for determining coordinates of a plurality of portions of the image based on optical analysis of the image by the computer system, wherein the optical analysis identifies items in the image that are visually distinct from other items in the image; an image extractor of the computer system that is configured to use the determined coordinates to identify a plurality of sub-images of the image in a first arrangement, the plurality of sub-images corresponding to the plurality of portions; and a document generator of the computer system that is configured to generate a second electronic document that includes the plurality of sub-images in a second arrangement, the second arrangement being different than the first arrangement, wherein the second arrangement groups the plurality of sub-images based on one or more attributes of the sub-images, wherein the one or more attributes based upon which the sub-images are grouped in the second arrangement include image size and image shape; wherein the interface is further configured to provide the generated second electronic document to the mobile computing device. 14. The system of claim 13 , further comprising means for generating an image map for the image based on the determined coordinates; wherein the plurality of sub-images are created based on the generated image map.