1. A pedestrian detector including a camera provided on a vehicle and arranged to take an image in front of the vehicle; and an image analyzer connected to the camera so as to receive the image from the camera and comprising: a composite feature-extracting module comprising: a histogram of oriented gradients (HOG) feature-extracting module that extracts contour features of the image; a granule-based comparison feature-extracting module that extracts variations of brightness in an array of granules of the image with granules considered both individually and as combined with other granules and creates a 10-dimensional vector to overcome errors related to poor quality of the image; and a feature-combination module that combines the extracted contour features of the image with the extracted variations of brightness in granules of the image and create a single feature vector that includes the extracted contour features and the extracted variations of brightness in granules of the image; and a support vector machine that determines whether there is a pedestrian based on the single feature vector and whether there is a pedestrian in front of the vehicle.