Image sharing system and related computer program product

A computer program product, stored in a non-transitory storage device of an image playback device of an image sharing system, when executed by a control circuit of the image playback device, enabling the image playback device to generate a GUI, wherein the image sharing system comprises an image providing server and the image playback device, the image providing server being configured to operably store a site location data and a site orientation data of a target site, multiple image data, and multiple photographing position data respectively corresponding to the multiple image data, to operably calculate a photographing positions distribution information representing a spatial distribution of the multiple photographing position data according to the site location data, the site orientation data, and the multiple photographing position data, and to operably transmit the photographing positions distribution information through Internet after receiving an image enquiry request transmitted from the image playback device, wherein each of the multiple image data is photographed within a predetermined distance from the target site or contains at least a portion of image content of an event occurred at the target site;

• the image playback device comprises a communication circuit, a display device, an input device, and the control circuit, the computer program product comprising:
• a receiving module, for utilizing the communication circuit to receive the photographing positions distribution information transmitted from the image providing server through the Internet;
• an option object generating module, for utilizing the control circuit to generate multiple option objects respectively corresponding to the multiple image data;
• an arranging module, for utilizing the control circuit to arrange the multiple option objects according to the photographing positions distribution information so as to generate a graphic user interface (GUI) containing the multiple option objects and one or more reference indicators;
• a displaying control module, for utilizing the display device to display the GUI;
• and
• a transmitting module;
• wherein when the display device displays the GUI, if a moving command issued by the user is received by the input device, the displaying control module controls the display device to move at least part of the multiple option objects in the GUI toward a same side and to correspondingly change position or content of at least one of the one or more reference indicators, and if an option object selection command corresponding to a target option object in the GUI is received by the input device, the transmitting module controls the communication circuit to transmit an image data request corresponding to the target option object to the image providing server through the Internet;
• wherein when the image data request is received by the image providing server, the image providing server transmits a target image data out of the multiple image data to the communication circuit through the Internet, and when the target image data is received by the communication circuit, the control circuit controls the display device to display the target image data.