Patent ID: 8566892

Claim:
A network system comprising: an image projection apparatus that projects image data; a first terminal; and a second terminal, connected with each other via a network, wherein the first terminal includes an original image data storing unit that stores original image data, an image data generating unit that generates image data for projection, for which an amount of information is reduced from the original image data, from the original image data, a corresponding information generating unit that generates corresponding information in which image identification data of the image data for projection capable of identifying the original image data and terminal identification data for identifying the first terminal correspond with each other, a first sending unit that sends the image data for projection with the respective corresponding information to the image projection apparatus, a reading unit that reads, upon receiving a request for delivering the original image data including the image identification data from the image projection apparatus, the original image data from the original image data storing unit based on the image identification data included in the request, a second sending unit that sends the original image data read by the reading unit to the image projection apparatus, wherein the second terminal includes an image obtaining unit that sends a request for delivering image data being projected by the image projection apparatus to the image projection apparatus, and obtains the original image data which is obtained by the image projection apparatus from the first terminal in response to the request from the image projection apparatus, and wherein the image projection apparatus includes a storing unit that stores the image data for projection in correspondence with the corresponding information sent from the first sending unit, an image projection unit that projects the image data for projection, a request sending unit that sends, upon receiving the request for delivering the image data being projected from the second terminal, the request for delivering the original image data including the image identification data, which is included in the corresponding information stored in the storing unit, to the first terminal, an original image receiving unit that receives the original image data in response to the request sent by the request sending unit from the first terminal, and an original image sending unit that sends the original image data received by the original image receiving unit to the second terminal.