Плейбой и Цифровая Обработка Сигналов

[Phantom]

Знающие поймут о чем речь

Sonnet for Lena

O dear Lena, your beauty is so vast

It is hard sometimes to describe it fast.

I thought the entire world I would impress

If only your portrait I could compress.

Alas! First when I tried to use VQ

I found that your cheeks belong to only you.

Your silky hair contains a thousand lines

Hard to match with sums of discrete cosines.

And for your lips, sensual and tactual

Thirteen Crays found not the proper fractal.

And while these setbacks are all quite severe

I might have fixed them with hacks here or there

But when filters took sparkle from your eyes

I said, "Fuck this shit. I'll just digitize."

by Thomas C

Ну и фото этой прелестной особы, xотя её и так все знают

[Phantom]

Для теx кто не знает о чем речь

Introduction

The Lenna (or Lena) picture is one of the most widely used standard test images used for compression algorithms. The comp.compression FAQ says the following:

For the curious: 'lena' or 'lenna' is a digitized Playboy centerfold, from November 1972. (Lenna is the spelling in Playboy, Lena is the Swedish spelling of the name.) Lena Soderberg (ne Sjööblom) was last reported living in her native Sweden, happily married with three kids and a job with the state liquor monopoly. In 1988, she was interviewed by some Swedish computer related publication, and she was pleasantly amused by what had happened to her picture. That was the first she knew of the use of that picture in the computer business.

For the full details on the history of this image check out this excellent May 2001 article in the Newsletter of the IEEE Professional Communication Society by Jamie Hutchinson. Here's an excerpt:

Alexander Sawchuk estimates that it was in June or July of 1973 when he, then an assistant professor of electrical engineering at the USC Signal and Image Processing Institute (SIPI), along with a graduate student and the SIPI lab manager, was hurriedly searching the lab for a good image to scan for a colleague's conference paper. They had tired of their stock of usual test images, dull stuff dating back to television standards work in the early 1960s. They wanted something glossy to ensure good output dynamic range, and they wanted a human face. Just then, somebody happened to walk in with a recent issue of Playboy.

The engineers tore away the top third of the centerfold so they could wrap it around the drum of their Muirhead wirephoto scanner, which they had outfitted with analog-to-digital converters (one each for the red, green, and blue channels) and a Hewlett Packard 2100 minicomputer. The Muirhead had a fixed resolution of 100 lines per inch and the engineers wanted a 512 x 512 image, so they limited the scan to the top 5.12 inches of the picture, effectively cropping it at the subject's shoulders.

http://www-2.cs.cmu.edu/~chuck/lennapg/lenna.shtml

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