Method for checking a terminal of a metal plate and a rolling method using the same

A method for checking a terminal of a metal plate and a rolling method using the same are provided. In the method for checking a terminal of a metal plate, at first an image-capturing device is used to capture a plurality of roll images. Then, a thresholding method is performed on the roll images to obtain a plurality of thresholded images. Thereafter, a plate terminal image is determined from the thresholded images in accordance with a gray level threshold value. Then, a plate terminal region is defined in the plate terminal image. Thereafter, a terminal raising value and a terminal raising direction are determined in accordance with the plate terminal region. Then, it is determined that if the terminal of the metal plate is abnormally bended in accordance with the plate terminal raising value and the terminal raising direction. In the rolling method, at first the method for checking the terminal of the metal plate is performed. Then, a rolling machine is tuned in accordance with the plate terminal raising v