A Three-Dimensional Virtual Simulation System of Spinning Production Line

Abstract

<p class="Abstract"><span lang="EN-US">This study takes a chemical fiber factory&rsquo;s spinning production line as the prototype to realize a three-dimensional virtual simulation system. Geometric three-dimensional models are constructed by exploiting the image-based three dimension reconstruction technology, in which Harris algorithm is utilized to detect corners of the modeling objects. 3DSMAX is used to give each model a highly imitative material, and deploy panoramic lighting. For virtual interaction, OGRE is utilized to realize the roaming and interaction of the virtual scene, thus finally completes a virtual simulation system for the spinning production line. Experimental results show that the system achieves a high degree of simulation of three-dimensional virtual scene and gives the user great sense of immersion, which meet the needs of virtual reality.</span></p

Depth from Defocus Based on Geometric Constraints

“…whereσ is also called the spread of PSF, 0 r is the radius of lens aperture, 0 v is the image plane-to-lens distance, and ρ is a camera constant that depends on the sampling resolution on the image plane. According to (1) Generally, the problem of DFD can be formulated as the minimization of the discrepancy between the measured defocused images and the defocused model images in (2) [5][6][7][8]. However, this requires the estimation of an additional unknown, the radiance.…”

“…Depth measurement is an important research field in computer vision, and it has been one of the key techniques in many fields, such as medicine, robotics and remote-sensing [1][2]. This paper focuses on the method to recover the depth map from multiple defocused images (typically two) with different camera parameters (i.e.…”