Image correction system and method

An image correction system, which is applicable to an image to be corrected, the image correction system comprising:

• a camera configured to obtain the image to be corrected;
• and
• a processor configured to generate a first extrapolation line segment and a second extrapolation line segment correspondingly based on a first straight line segment and a second straight line segment in the image to be corrected,
• wherein the processor also determines whether a slope value of the first extrapolation line segment and a slope value of the second extrapolation line segment are the same, and when the processor determines the slope value of the first extrapolation line segment and the slope value of the second extrapolation line segment are different, the processor rotates the image to be corrected by a rotation angle to obtain a preliminary corrected image, wherein the first extrapolation line segment and the second extrapolation line segment of the preliminary corrected image have the same slope value,
• wherein when the processor determines the first extrapolation line segment and the second extrapolation line segment have the same slope value or obtains the preliminary corrected image, the processor performs a keystone correction process to generate a corrected image;
• wherein the image to be corrected have a first boundary and a second boundary which are opposite of and parallel with each other, and the processor generating the first extrapolation line segment and the second extrapolation line segment comprises:
• the processor extending the first straight line segment and the second straight line segment to generate a first extending straight line segment and a second extending straight line segment, wherein both the first extending straight line segment and the second extending straight line segment intersect the first boundary and the second boundary, the processor also performs an extrapolation process to obtain the first extrapolation line segment and the second extrapolation line segment according to a plurality of intersection points of the first extending straight line segment intersecting the second extending straight line segment at the first boundary and the second boundary, a first center point of the first boundary, a second center point of the second boundary and a half side length of the first boundary, wherein the half side length is a length between the first center point and an end of the first boundary, and the first extrapolation line segment and the second extrapolation line segment passes the end and an another end of the first boundary, respectively.