1. An image processing method, comprising: capturing an original image; obtaining a high-bright image, a medium-bright image, and a low-bright image from the original image; determining a high-bright weight array, a medium-bright weight array, and a low-bright weight array according to the high-bright image, the medium-bright image, and the low-bright image; and obtaining a high-dynamic-range image according to the high-bright image, the medium-bright image, the low-bright image, the high-bright weight array, the medium-bright weight array, and the low-bright weight array.