1. An image correction method, for outputting a corrected image according to an image to be corrected, the corrected image comprising a plurality of corrected pixel blocks, the image to be corrected being captured by a fisheye lens camera, the image correction method performing a plurality of pixel value computations, each pixel value computation being utilized for generating a pixel value of each corrected pixel within a corrected pixel block, and comprising: establishing a coordinate transformation relation between the image to be corrected and the corrected image, such that a first coordinate value of each corrected pixel within the corrected pixel block corresponds to a second coordinate value within the image to be corrected, wherein the coordinate transformation relation is determined by at least a perspective distortion correction coordinate transformation, and in the perspective correction distortion coordinate transformation, an angle parameter corresponding to an object plane and an image plane is determined by an incidence angle of an incident beam corresponding to the image to be corrected, where the incident beam passes through an optical center of the fisheye lens; according to the coordinate transformation relation, determining a pixel block to be corrected including a plurality of pixels, which corresponds to the corrected pixel block, and selecting a pixel block to be processed which comprises at least the pixel block to be corrected from the image to be corrected; and utilizing the second coordinate value corresponding to the corrected pixel for determining a plurality of specific pixels to be processed that correspond to the corrected pixel, and generating a pixel value of the corrected pixel by performing an interpolation computation upon a plurality of pixel values of the specific pixels to be processed.