Multi-projection system for extending visual element of main image

A multi-projection system comprising:

• a main projection surface on which a main image is reproduced;
• an auxiliary projection surface arranged around the main projection surface,
• a main projection device for projecting an image on the main projection surface;
• an auxiliary projection device for projecting an image on the auxiliary projection surface;
• and
• a management device for controlling the operation of the main projection device and the auxiliary projection device,
• wherein (i) the management device recognizes visual element included in the main image and determines whether the recognized visual element correspond to a predetermined specific visual element by comparing color and pattern of the recognized visual element with those of specific visual element stored in a storage unit, and (ii) when the management device determines the recognized visual element correspond to the predetermined specific visual element, the management device extracts an auxiliary image from the main image and transmits the extracted image to the auxiliary projection device,
• wherein the auxiliary projection device projects the visual element associated with the main image on the auxiliary projection surface to extend a visual effect of the image, and
• wherein the management device operates the auxiliary projection device only when the predetermined specific visual element is included in the main image.