Focusing and Defocusing Vision System (SIVEDI)

Machine vision has been made easier by the development of computer systems capable of processing information at high speeds and by inexpensive camera-computer systems. A Camera-Computer system called SIVEDI was developed based in the shape from focusing technique (SFF) as proposed by Jenn [1] and a shape from defocusing technique (SFD) developed in this research. The SIVEDI system has as entries the images captured by the camera, the number of steps of the focus mechanism, and the user specifications. The focus mechanism used is the internal one of the camera. To control it an interface computer-camera was designed and developed. An equation is introduced to obtain the measure of relative defocus among many images. A 3D image is produced as the result of the system. SIVEDI consist of a number of modules, each one implementing a step in the system model. The modules are independent of each other and could be easily modified to improve the system. As SIVEDI was developed in MatLab environment, it can be used in any computer with this software on it. These characteristics offer the user to access the intermediate results and to control the system internal parameters. Results show that the 3D image reconstruction has an acceptable quality.