A vehicle environment recognition system comprises an input section for forming an input electronic image of a forward road ahead of a vehicle, and an image processing section for detecting another vehicle ahead or a configuration of the forward road from the image. The processing section prepares a set of integrand images from two or more input images, and produces a new integral image by superposing the integrand images. From information supplied from the input section, the processing section detects a lateral position of the vehicle relative to the road, and adjusts the lateral positions of the integrand images in accordance with the detected lateral vehicle position before the integration to produce the integral image. The recognition system can therefore integrate images without undesirable lateral deviation and detects an object region accurately from the integral image.