Image dark corner removing method and device for large visual field camera

The invention dioceses an image dark corner removing method and device for a large visual field camera. Whether a dark corner exists in an image or not is judged according to symmetry of radial gradient distribution of the image; the dark corner is estimated through statistic features of the whole image; and different from a traditional method of estimating the dark corner by selecting a square area with a fixed size, the method is applicable to the images of different resolutions and is applicable to the images with relatively large dark corners, and a possibility of occurring deviation is relatively low. According to the method and the device, parameters are designed according to the to-be-corrected image, the universality is high, the method and the device are applicable to the images with different dark corner effects formed under different illumination and different environments, the application range is relatively wide, and a special camera is not limited. According to the method and the device, model p