Results 251 to 260 of about 12,066,747 (304)

Surface quality of intraocular lenses

Journal of Cataract and Refractive Surgery, 1989
We observed circular furrow-like patterns on the implanted intraocular lens surface in postoperative follow-up examination by specular microscopy. The patterns may have been deep lathe-cut marks or compression-related marks on the optics. Specular microscopy, polarized light microscopy, and scanning electron microscopy detected a similar circular mark ...
K, Ohara, K, Okada, T, Akahoshi
openaire   +2 more sources

Surface Quality Prediction in Aluminum Extrusion

Key Engineering Materials, 2011
The surface quality of aluminium extrusion products can be hampered by undesired surface features like die lines and pickups. In particular the presence of pickups is considered as undesirable. Surface pickups appear as intermittent torn marks on the aluminium extrusion products, often terminated with a protruding lump rising above the surface up to ...
Rooij, M.B. de, Ma, X., Bakker, A.J. den, Werkhoven, R.J.   +3 more
openaire   +4 more sources

Quality Control of Manufactured Surfaces

2010
Recent literature on statistical process monitoring pointed out that the quality of products and processes can be often related to profiles, where the function relating a response to one or more location variables (in time or space) is the quality characteristic of interest.
COLOSIMO, BIANCA MARIA, F. Mammarella, PETRO', STEFANO   +2 more
openaire   +3 more sources

Quality Improvement of Surface Triangulations

2006
This paper presents a new procedure to improve the quality of triangular meshes defined on surfaces. The improvement is obtained by an iterative process in which each node of the mesh is moved to a new position that minimizes certain objective function.
Rafael Montenegro, José María Escobar, Gustavo Montero, Eduardo Rodríguez 0001   +3 more
openaire   +3 more sources

Surface mesh qualities

Proceedings of the International Conference on Computer Graphics Theory and Applications and International Conference on Information Visualization Theory and Applications, 2013
3D surface models are often stored as indexed face sets, whereas algorithms can typically treat only a subset of the so-representable surfaces. Besides this gap between "potential" input and "allowed" input, more and more algorithms specify their input requirements at a high level of abstraction (e.g.
openaire   +4 more sources

Objective assessment of the surface quality of coated surfaces

Insight - Non-Destructive Testing and Condition Monitoring, 2011
A novel procedure has been developed for the assessment of the surface finish of in-mould gel-coated fibre-reinforced polymer matrix composites. The technique involves photographing the reflection from a coated surface on an opaque screen and analysing the image using fractal dimensions.
Q Labrosse, C P Hoppins, J Summerscales
openaire   +1 more source

High Quality Triangulation of Implicit Surfaces

Ninth International Conference on Computer Aided Design and Computer Graphics (CAD-CG'05), 2006
We present a new high quality tessellation method for implicit surfaces in this paper. The approach can handle arbitrary implicit functions and dynamic implicit surfaces based on skeletal primitives. We first samples the implicit surface uniformly using particle fission and floating, then reconstructs a triangular mesh from the sample points using ball
Shengjun Liu 0002, Xuehui Yin, Xiaogang Jin 0001, Jieqing Feng   +3 more
openaire   +1 more source

Visual inspection of weld surface quality

Journal of Intelligent & Fuzzy Systems, 2020
Welding is an important method for modern material processing. In actual processing, due to the influence of processing accuracy and welding thermal deformation, various defects often appear in the appearance of the weld. At present, visual inspection is mainly used for the appearance inspection of welds. The detection of weld defects mainly depends on
Yan Li, Miao Hu, Taiyong Wang
openaire   +2 more sources

Image statistics and the perception of surface qualities

Nature, 2007
The world is full of surfaces, and by looking at them we can judge their material qualities. Properties such as colour or glossiness can help us decide whether a pancake is cooked, or a patch of pavement is icy. Most studies of surface appearance have emphasized textureless matte surfaces, but real-world surfaces, which may have gloss and complex ...
Isamu, Motoyoshi, Shin'ya, Nishida, Lavanya, Sharan, Edward H, Adelson   +3 more
openaire   +2 more sources

Spectroscopic Evaluation of the Surface Quality of Apple

Journal of Agricultural and Food Chemistry, 2003
Different spectroscopic techniques based on infrared and Raman were used to evaluate the natural wax and related surface quality of apple fruit. Transmission near-infrared (NIR) spectroscopy was applied to solutions of single wax components and extracted apple wax. Fourier transform infrared (FTIR) spectroscopy was used for transmission measurements of
E A, Veraverbeke, J, Lammertyn, B M, Nicolaï, J, Irudayaraj   +3 more
openaire   +2 more sources