The purpose of this study is to extract 3D information from 2D images passively. Though the voting technique is one of the passive methods to obtain the 3D information effectively, it cannot be applied to objects with smooth surfaces. It can measure only the feature points such as the edges which were previously extracted from each image. In this paper, we propose a new method to measure the 3D shape, which we call "a pixel voting method". In this method, the voting is simply done by using the information from the pixels of the images to measure the whole surface of the 3D object without feature extraction.