Video image enhancement method and device, and parking assisting system

Provided are a video image enhancement method and device, and a parking assisting system. The method comprises extracting a gray level component image in original images collected by a camera in real time; according to relative light and shade relations between pixel points of the gray level component image and the pixel points in the gray level component image after Gaussian smoothing, carrying out gray level correction on the pixel points of the gray level component image; and compiling the gray level component image after the gray level correction, thus to obtain an enhanced image. According to the above technical scheme, the gray level of the pixel points of the gray level component image is compared with that of the pixel points of the image after Gaussian smoothing, and gray level correction is carried out on the gray level component image, such that the image obtained after enhancement is constant in color and high in contract ratio and definition.