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3D Image Processing in Structural Characterization of Electrospun Nanofibrous Membranes
Published in A. K. Haghi, K. M. Praveen, Sabu Thomas, Engineered Carbon Nanotubes and Nanofibrous Materials, 2019
Bentolhoda Hadavi Moghadam, Shohreh Kasaei, A. K. Haghi
In the final step, the texture mapping is applied to the 3D point cloud to provide a 3D surface of the SEM image. The texture mapping of the 3D model is a method for adding surface texture to a computer-generated model in computer graphics. The textures for the 3D objects are generated by using an automatically projection method. The texture coordinates are equivalent to the XYZ coordinates in the 3D spaces. Basically, the texture mapping specifies the connection between the points in a 3D object with the position of the image on the object. Due to the optical limitation of the measuring instrument, the datasets often contain nonmeasured data points (holes or voids) that requires being filled before any further analysis. The virtual surface-based 3D model was converted into a volume-based model by adding 3D points to the surface mesh with the software program.128
Augmenting Haptic Perception in Surgical Tools
Published in Terry M. Peters, Cristian A. Linte, Ziv Yaniv, Jacqueline Williams, Mixed and Augmented Reality in Medicine, 2018
Randy Lee, Roberta L. Klatzky, George D. Stetten
Rendering in computer graphics refers to the process by which images (visual stimuli) are produced from two-dimensional scenes or three-dimensional (3D) models. In the context of haptics, rendering refers to the process by which tactile stimuli—for example, forces or vibrations—are presented to a user to convey information about a virtual object (Salisbury et al. 2004). High-fidelity haptic rendering therefore requires a method to sense user interaction in terms of position, velocity, or force, in multiple degrees of freedom (DoF), and subsequently to use that interaction to generate feedback forces against the user. Most commercially available haptic renderers (e.g., Geomagic Touch, Novint Falcon) are restricted to actuating in only the three translational DoF, using motors and pulleys that act on a stylus or ball. The Magnetically Levitated Haptic Device (MLHD) from Butterfly Haptics can actuate forces in all six DoF albeit over a smaller reachable volume (Berkelman and Hollis 1997, 2000).
Digital Image Processing Systems
Published in Scott E. Umbaugh, Digital Image Processing and Analysis, 2017
A field related to image processing is that of computer graphics. Computer graphics is a specialized field within the computer science realm which refers to the creation or reproduction of visual data through the use of the computer. This includes the creation of computer images for display or print, and the process of generating and manipulating any images (real or artificial) for output to a monitor, printer, camera, or any other device that will provide an image. Computer graphics can be considered a part of image processing, insofar as many of the same tools the graphics artist uses may be used by the image processing specialist.
Three-dimensional interactive cursor based on voxel patterns for autostereoscopic displays
Published in Journal of Information Display, 2022
Vladimir Saveljev, Jung-Young Son, Choonsik Yim, Gwanghee Heo
In computer graphics, rendering is a process of creating an image based on the 3D model of the objects and their properties, such as texture. Typically, it is a view of a scene, which is photographed or calculated for a certain point in 3D, based on geometry, texture, lights, etc. In multiview imaging, this process has to be repeated for each view and then the rendered view images are displayed in a proper manner. For instance, some methods use multiple views (e.g. nine views in [13] and four views in [14]); however, to show the marker, they used to render views of the marker at each of its next locations. The rendering of multiple views is a critical, time-consuming and resource-consuming issue of 3D imaging, where special graphics processors are often used [15,16].
An overview of interactive wet cloth simulation in virtual reality and serious games
Published in Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, 2018
Ahmad Hoirul Basori, Mohammed Hazim Alkawaz, Tanzila Saba, Amjad Rehman
Computer graphics are the creation of graphics using computers. In general, it is the image’s data representation and manipulation by a computer with software and hardware support. Computer graphics can be divided broadly into two kinds: vector graphics and raster (online) graphics. In both cases, the idea is to represent an image (Rautaray & Agrawal 2015). The difference is in how the image is represented in Shirley et al. (2010).