Abstract—Considering complexity of products, new geometrical design and investment tolerances that are necessary, measuring and dimensional controlling involve modern and more precise methods. Photo digitizing method using two cameras to record pictures and utilization of conventional method named ―cloud points‖ and data analysis by the use of ATOUS software, is known as modern and efficient in mentioned context. In this paper, benefits of photo digitizing method in evaluating sampling of machining processes have been put forward. For example, assessment of geometrical integrity surface in 5-axis milling process and measurement of carbide tool wear in turning process, can be can be brought forward. Advantages of this method comparing to conventional methods have been expressed. Keywords— photo digitizing, tool wear, geometrical integrity, cloud points I. INTRODUCTION ome of influenced phenomena in machining processes include: roughness, surface torsion, geometrical integrity of surface, residual stresses, machining forces, temperature resulted from machining process, metallographic changes, hardness of subsurface, tool wear and tool life. To measure these phenomena, measuring tools such as profile meter, strain gage, dynamo meter, thermometer, SEM, ultrasonic method, interferometer are applied. These methods bear some limitations including shortage of measurement amplitude, impressibility of environment temperature. Lack of portability of equipments and impossibility of using them to measure freeform and sculpture work pieces[1, 2, 3, 4]. It should be said that in many of these methods, 3D measuring is not possible and consecutive 2D sampling is performed. Besides, efficacy of conventional methods is confined to measurement theme. Now by the aid of photo digitizing method, operator can conquer listed problems. On the other hand special ability will emerge. This important ability is benefit of this method in developing CAD data from sample to apply them in maintenance, reconfiguration and creation of change. R. Alipour is with the mechanical engineering, Islamic Azad University of Mahshahr, Iran, (e-mail: r.alipour@mahshahriau.ac.ir). F. Nadjarin, is lecture in mechanical engineering (f_nadjarian@yahoo.com) A. Alinaghizade is with the mechanical engineering, Islamic Azad University of Semnan, Iran, (e-mail: Alinaghizadeh_11425@yahoo.com). Modeling and supplying computer data from prior products that you don’t have access to pervious pl an or file, are known as applications of these methods as well. II. EQUPMENTS Equipments that are necessary for this method include a light source for radiating on work pieces, two cameras for recording pictures resulted from light reflection that are able to change lens and focus on picture, granite desktop and fixtures for work pieces, Linux software by the aid of ATOUS software can proper a final and perfect picture of model surface. ATOUS software is able to correspond, received image from both cameras. Equipments needed for this method are produced only by few companies in the world. In this paper utilized equipments have been made by GOM Company in Germany. Figure 1 shows cameras, granite desktop and fixture of work piece. Figure 1- equipment of photo digitizing system III. METHOD OF TEST Primarily, surface of models are covered with a dimmer powder in order that they can be totally dimmed. It is due lack of intense light reflection reflected on surface to scan model. In order to correspond images from two cameras and Inspection of geometrical integrity of work piece and measurement of tool wear by the use of photo digitizing method F. Nadjarian S