Single-frame image based wide dynamic range processing method and system

The invention discloses a single-frame image based wide dynamic range processing method. The method includes that the brightness component of a single-frame source image is subjected to low-pass filtering and denoising respectively, and the boundary information is extracted according to the data of two images obtained by low-pass filtering and denoising; the acquired boundary information is introduced into the brightness component of the source image information to obtain a dark image and a bright image; according to a priori curve to adjust the brightness adjustment mapping process to adjust the boundary information, and the brightness values of the dark image and the bright image are adjusted through the brightness degree adjusting and mapping processing according to the priori curve; on the basis of dark image brightness adjustment, the boundary information after the brightness adjustment is introduced to compensate for the contour information of the acquired image, and the brightness of the final image is