Computer-generated metamorphoses evolve
Article Abstract:
Morphing has becoming a popular technology for conversion of one filmed 3D image to another in a computer's 2D domain. The technology is being used in such Hollywood movies as 'Terminator2: Judgement Day' and such music videos as Michael Jackson's 'Black or White.' Morphing was originated by Tom Brigham at the New York Institute of Technology in 1982 and improved by such companies as the Industrial Light and Magic subsidiary of LucasArts Co (Los Angeles, CA) and Pacific Data Images. The technology works by stretching identified points on beginning and final images towards an intermediate shape. Two converging sequences are then combined. Successful morphing sequences require the creative eye of an animator to determine the visually most effective intermediate transformation steps. Morphing differs from computer 'metamorphosis' technology, which consists of a 3D transformation of one 3D computer-rendered graphic into another, with the result subsequently superimposed on film.
Publication Name: IEEE Spectrum
Subject: Engineering and manufacturing industries
ISSN: 0018-9235
Year: 1992
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Computer benchmarking: paths and pitfalls
Article Abstract:
Measuring computing power is an imprecise art. A widely used technique is called benchmarking, which is the practice of running a well-known set of programs on more than one machine and comparing performance. Any performance evaluation should include: accurate characterization of the workload; initial tests using simple programs; and further tests with jobs that characterize the everyday workload. There are a number of common mistakes in benchmarking that can lead to problems: neglecting to characterize the workload; selecting kernels that are too simplistic; using programs adapted to a specific system; running under inconsistent conditions; selecting inappropriate workload measures; neglecting the special needs of users; and ignoring the difference between frequency and duration of execution. Overall evaluation of a system must go beyond benchmarking to include qualitative evaluations as well.
Publication Name: IEEE Spectrum
Subject: Engineering and manufacturing industries
ISSN: 0018-9235
Year: 1987
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