Projection system and automatic setting method thereof

An automatic setting method, adapted to a projection system, wherein the projection system comprises a processing device and at least one projector, the projector comprises a projection unit and an image capturing unit, and the automatic setting method comprises:

• projecting an image frame onto a projection plane by the projection unit, wherein the image frame comprises a grid point array;
• capturing the image frame on the projection plane according to a plurality of setting parameters by the image capturing unit, so as to obtain a plurality of captured images corresponding to the setting parameters;
• analyzing the captured images to determine whether the captured images meet a preset image condition;
• when one of the captured images meets the preset image condition, selecting one of the captured images meeting the preset image condition as a desired captured image;
• and
• setting one of the setting parameters corresponding to the desired captured image as a desired setting parameter, and setting the image capturing unit according to the desired setting parameter.