Communication apparatus, communication system, data communication method, and program

A receiving apparatus comprising:

• an image acquisition section capturing a projected image by a projector, detecting an event which is a luminance change equal to or greater than a prescribed threshold, and outputting event information including a pixel position and occurrence time of an event occurrence pixel;
• an event analysis section to which the event information is input and which detects a communication data image contained in the projected image on a basis of an event occurrence interval;
• and
• a data analysis section acquiring communication data from the communication data image.

A communication system comprising:

• a transmission apparatus;
• and
• a receiving apparatus, wherein
• the transmission apparatus includes
• a projector outputting an image, and
• an output image generation section generating the image output from the projector,
• the output image generation section generating a communication data image that records communication data,
• the projector performing an output process for outputting a viewing image and the communication data image generated by the output image generation section, and
• the projector outputting the viewing image and the communication data image by setting an output time period of the communication data image to be longer than an output time period of each of sub-frame images that configure the viewing image, and
• the receiving apparatus includes
• an image acquisition section capturing a projected image by the projector, detecting an event which is a luminance change equal to or greater than a prescribed threshold, and outputting event information including a pixel position and occurrence time of an event occurrence pixel,
• an event analysis section to which the event information is input and which detects a communication data image contained in the projected image on a basis of an event occurrence interval, and
• a data analysis section acquiring communication data from the communication data image.

A data communication method executed by a transmission apparatus, wherein

• the transmission apparatus includes
• a projector outputting an image, and
• an output image generation section generating the image output from the projector,
• the output image generation section generating a communication data image that records communication data,
• the projector performing an output process for outputting a viewing image and the communication data image generated by the output image generation section, and
• the projector outputting the viewing image and the communication data image by setting an output time period of the communication data image to be longer than an output time period of each of sub-frame images that configure the viewing image.

A program for causing a transmission apparatus to execute a data transmission process, wherein

• the transmission apparatus includes
• a projector outputting an image, and
• an output image generation section generating the image output from the projector,
• the program causes the output image generation section to generate a communication data image that records communication data, and
• the program causes the projector to perform an output process for outputting a viewing image and the communication data image generated by the output image generation section, and to output the viewing image and the communication data image by setting an output time period of the communication data image to be longer than an output time period of each of sub-frame images that configure the viewing image.

A program for causing a receiving apparatus to execute a data receiving process, comprising:

• causing an image acquisition section to execute an image acquisition process for capturing a projected image by a projector, for detecting an event which is a luminance change equal to or greater than a prescribed threshold, and for outputting event information including a pixel position and occurrence time of an event occurrence pixel;
• causing an event analysis section to execute an event analysis process for causing the event information to be input to the event analysis section, and for detecting a communication data image contained in the projected image on a basis of an event occurrence interval;
• and
• causing a data analysis section to execute a data analysis process for acquiring communication data from the communication data image.