Resumen
The article focuses on the importance of computer graphics in 3-Dimensional (3D) models. Computer graphics allows to render realistic images of the 3D world. But before these images can be generated, graphics models of the world have to be available. Traditionally, these models are obtained through 3D modeling packages-a time-consuming process that produces only limited detail and realism. 3D models are therefore increasingly obtained by sampling the world. A number of approaches are available. Best known are probably laser range scanners and other devices that project light onto the object and obtain 3D information by observing the reflection. Another consists of using images of a scene or objects one wishes to reconstruct, for example, a picture can be used as a texture map for a 3D model. Along with appearance, an estimate of the 3D shape can also be extracted from images. The simplest way to understand how a 3D shape can be obtained is by considering the innate perception of the 3D world. Depth can be perceived by observing 3D environment from two slightly different viewpoints.