In this paper we describe a method for creating sharp features and trim regions on multiresolution subdivision surfaces along a set of user-defined curves. Operations such as engraving, embossing, and trimming are important in many surface modeling applications. Their implementation, however, is non-trivial due to computational, topological, and smoothness constraints that the underlying surfac...

Surface reflection can be used as one quality assurance procedure to inspect the defects, cracking, and other irregularities occurring on a polished surface. In this paper, we present a novel approach to the detection of defects based on analysis of surface reflection images. In this approach, the surface image is analyzed using texture analysis based on Gabor-filtering. Gabor-filters can be us...

Photometric Stereo (PMS) recovers orientation vectors from a set of graylevel images. Under orthography, when the lights are unknown, and for a single uniform Lambertian surface, one can recover surface normals up to an unknown overall orthogonal transformation. The same situation obtains if, instead of three graylevel images, one uses a single KGB image taken with at least three point or exten...

The Submicron Structures Laboratory at MIT develops techniques for fabricating surface structures with feature sizes in the range from nanometers to micrometers and uses these structures in a variety of research projects. These projects, described briefly below, fall into four major categories: (1) development of submicron and nanometer fabrication technology; (2) nanometer and quantumeffect el...

Analysing metal surfaces of massive metal instruments like boilers are tedious process, which also require very specialized equipments. To employ the surface analysis schemes at a lower cost, image processing facilitates many processing methodologies. Using the camera captured live images of the metal surface from the massive metal equipments, image processing techniques can be applied and simi...

Global surface temperatures continue to rise. In most surface temperature data sets, the years 2014, 2015 and again 2016 set new global heat records since the start of regular measurements. Never before have three record years occurred in a row. We show that this recent streak of record heat does not in itself provide statistical evidence for an acceleration of global warming, nor was it preced...

This report describes a new pyroxmangite-rhodonite occurrence visited briefly by the authors as part of a broader study o,f gemstones in British Columbia. The discovery is on the Cl-t claims, 1.5 kilometres northwest of Mount Roderick Dhu (lat. 49”12’, long. 118’37’), 13 kilometres northeasi of Greenwood (Figure 1). Rhodonite is a manganiferous semiprecious stone valued for its pink to deep red...

artists of the late Edo period (1615–1868), has been described as “cocky, quarrelsome, restless, aggressive, and sensational.” He obsessed with his art to the extent that he would move frequently rather than clean or repair his cluttered houses. During an artistic career that spanned 7 decades, he signed his works with more than 30 different names—typically in tandem with a shift in his artisti...

The evaluation of micromilled parts quality requires detailed assessments of both geometry and surface topography. However, in many cases, the reduced accessibility caused by the complex geometry of the part makes it impossible to perform direct measurements. This problem can be solved by adopting the replica molding technology. The method consists of obtaining a replica of the feature that is ...