Presentation system, material presenting device, and photographing device for presentation

A presentation system comprising:

• a photographing section for photographing a material;
• a pointing mark photographed by the photographing section;
• a control section for generating a point image by transforming the position of the pointing mark to screen coordinates of an image displaying device;
• an image synthesizing section for synthesizing the point image with an image supplied by the photographing section or an image maintaining device other than the photographing section;
• and
• an image outputting section for outputting the image synthesized by the image synthesizing section to the image displaying device.

A material presenting device comprising:

• a material mounting device on which material which may be a document is mounted;
• a photographing device for photographing the material on the mounting device;
• and
• an optical path switching device which switches a direction of an optical path in which light enters into the photographing device to a direction different from a material photographing optical path.

A material presenting device comprising:

• a material mounting device on which a document is mounted;
• a displaying device for displaying an image which is provided on or adjacent to the mounting device;
• and
• a photographing device for photographing the displaying device;
• a pointing device for pointing on the displaying device;
• and
• a control device for displaying a plurality of command images on the displaying device and for performing a process specified by the command image when an operation of indicating a process on one of the command images is performed by the pointing device.