显示图像的文件头和信息头，并且显示直方图，图像平滑和锐化。-show the first images of documents and information head, it also shows the histogram, image sharpening and smoothing.

Abstract We present a component-based, trainable system for detecting frontal and near-frontal views of faces in still gray images. The system consists of a two-level hierarchy of Support Vector Machine (SVM) classifiers. On the first level,