Method, system, and non-transitory computer readable medium for detecting time difference

A system for detecting time difference comprising:

• a transmitting device and a receiving device being in time synchronization;
• an oscilloscope detecting a time difference generated when the transmitting device and the receiving device are in time synchronization to obtain a first time difference;
• the transmitting device generating a first system time after the transmitting device and the receiving device finishing the time synchronization;
• the transmitting device, based on the first system time, generating a first image, and transmitting the first image to a display to generate a second time difference;
• an image capturing device obtaining the first image from the display and generating a first signal according to the first image, to generate a third time difference;
• the image capturing device transmitting the first signal to the receiving device, the receiving device receiving the first signal to generate a fourth time difference;
• and
• the receiving device obtaining the first system time according to the first signal and generating a second system time when obtaining the first system time, and to generate a fifth time difference.

A non-transitory computer readable medium comprising program instructions for causing a system, comprising a transmitting device, a receiving device, an oscilloscope, a display, and an image capturing device, to perform at least the follow:

• the transmitting device and the receiving device being in time synchronization, the oscilloscope detecting a time difference generated when the transmitting device and the receiving device are in time synchronization to obtain a first time difference;
• the transmitting device generating a first system time after the transmitting device and the receiving device finishing the time synchronization;
• the transmitting device, based on the first system time, generating a first image, and transmitting the first image to the display to generate a second time difference;
• the image capturing device obtaining the first image from the display and generating a first signal according to the first image, to generate a third time difference;
• the image capturing device transmitting the first signal to the receiving device, the receiving device receiving the first signal to generate a fourth time difference;
• and
• the receiving device obtaining the first system time according to the first signal and generating a second system time when obtaining the first system time, and to generate a fifth time difference.