Palm Springs, Calif.
Thursday, Feb. 4, 2004, 9:30-12:30

Filtering, sampling, and resampling:
The mathematics of format conversion

Instructor: Charles Poynton
Duration: 1/2 day

In association with 2004 Tech Retreat

Description

Digital video, HDTV, and digital cinema all involve images represented as rows and columns of pixel values. At previous Tech Retreats, Charles has detailed the color interpretation of pixel values. In this session, we focus on the spatial aspects of pixels.

This seminar begins by introducing the theory behind the filtering and sampling operations that bring continuous scene information into the digital domain. We then explain resampling processes such as upconversion and downconversion that are implemented in the digital domain. Finally, we explain the reconstruction process that brings image data back into the continuous domain prior to - or as an intrinsic part of - image viewing.

Equipped with the theory, including an approachable explanation of the mathematics, we explore the practical implications of upconversion from SD to HD, downconversion from HD to SD, and the format conversion built into certain contemporary LCD, PDP, and DLP display devices. We review resampling schemes (such as bilinear and bicubic interpolation) common in desktop graphics applications. We examine resampling for film applications (such as downsampling from 4 K to 2 K). Finally, we will discuss whether resampling is best accomplished in linear-light (intensity) or nonlinear (perceptual) image data.

Audience: This seminar is appropriate for technical professionals who are experienced in creating and manipulating color imagery for SDTV, HDTV, or digital cinema. It is also suitable for programmers and engineers.

Materials provided: Course handouts will be provided. Portions of the seminar will be based upon Charles Poynton's book Digital Video and HDTV Algorithms and Interfaces, copies of which will be available for purchase.

Registration: USD 150, including lunch. Register through HPA; contact Hollywood Post Alliance Executive Director, Eileen Kramer at +1 626 799 1733

Charles Poynton - Courses & seminars
www.poynton.com/notes/events/
2003-12-16