Image shadow correction method, system and device

The invention discloses an image shadow correction method, system and device. The method comprises the following steps: acquiring an optical center coordinate of a camera unit and establishing an optical center coordinate system; acquiring first array image data based on the camera unit; performing coordinate conversion based on the first array image data and generating second array image data under an optical center coordinate system; and based on the second array image data, generating a correction coefficient taking the distance between the pixel point coordinate and the optical center coordinate as an independent variable. According to the method, the array image data under the optical center coordinate system is extracted, the light intensity attenuation coefficient model is called to fit the pixel points on the light intensity distribution curved surface point by point, the correction coefficient with the distance between the pixel point coordinates and the optical center coordinates as an independent v