|
|
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
|
|
|
|
Session An Archivist's Introduction to Digital Image Science Presenter Charles Poynton
Abstract ..
..Download Presentation ..
Image archivists are faced with a bewildering array of digital image capture, storage, and display devices. The characteristics of these devices have a strong influence on image quality, but it is often unclear to the archivist how to choose among competing devices, and what device parameters to use for capture, duplication, storage, or display of particular kinds of imagery.
In this tutorial, we will present the fundamental aspects of image science as it applies to digital continuous-tone imagery (both still and moving). We will explain how tone, color and detail are represented in the digital domain. We will explain the importance of the nonlinear coding of lightness in digital image systems, and outline the foundations of accurate reproduction of color. We will explain the capture, storage, and display of spatial detail, culminating by explaining why sharp images are not always good and blurry images are not always bad. Upon the completion of the tutorial, you will be able to estimate how many megabytes (or megabytes per second) are required to represent imagery at a given quality level.
Charles Poynton graduated with a degree in Mathematics from Queen's University in Kingston, Ontario. Subsequently, he studied at the Ontario College of Art in Toronto. He was invited to become a faculty member at OCA; he taught electronics to art students.
From 1981 to 1988, Mr. Poynton was proprietor of Poynton Vector Corporation. He and his colleagues designed and built the digital video equipment used at NASA's Johnson Space Center to convert video from the Space Shuttle into NTSC for recording and distribution.
While at Sun Microsystems in California, from 1988 to 1995, he initiated Sun's HDTV research project, and introduced color management technology to Sun.
He has contributed to many SMPTE and ITU-R standards, including Rec. 601, SMPTE RP 145, SMPTE 170M, and Rec. 709. He was the document editor for SMPTE 274M, the foundation for all of SMPTE's HDTV studio standards. Mr. Poynton has organized and presented many popular courses and seminars, including HDTV Technology at SIGGRAPH 91, Concepts of Color, Video and Compression at ACM Multimedia 93, and color technology courses at SIGGRAPHs from 1994 through 2004.
Poynton's book, A Technical Introduction to Digital Video, was published in 1996 by John Wiley, and reached fifth printing. In February 2003, his second book Digital Video and HDTV Algorithms and Interfaces, was the 3,339th most popular item at Amazon.com.
He now works as an independent contractor, specializing in the physics, mathematics, and engineering of digital color imaging systems, including digital video, HDTV, and digital cinema (D-cinema).
