![]() ![]() The image spread to over 100 different domains, particularly. The use of the photo in electronic imaging has been described as "clearly one of the most important events in history". The scan became one of the most used images in computer history. The peak of image hits on the internet was in 1995. This drew the attention of Playboy to the potential copyright infringement. But in July 1991, the image featured on the cover of Optical Engineering alongside Peppers, another popular test image. The image's reach was limited in the 1970s and 80s, which is reflected in it initially only appearing in. The Muirhead had a fixed resolution of 100 lines per inch and the engineers wanted a 512×512 image, so they limited the scan to the top 5.12 inches of the picture, effectively cropping it at the subject's shoulders. 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. Just then, somebody happened to walk in with a recent issue of Playboy. ![]() ![]() They wanted something glossy to ensure good output dynamic range, and they wanted a human face. They got tired of their stock of usual test images, dull stuff dating back to television standards work in the early 1960s. Intended for high resolution color image processing study, the Lenna picture's history was described in the May 2001 newsletter of the IEEE Professional Communication Society, in an article by Jamie Hutchinson: Īlexander Sawchuk estimates that it was in June or July of 1973 when he, then an assistant professor of electrical engineering at the University of Southern California 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. Roberts used two cropped six-bit grayscale facsimile scanned images from Playboy's July 1960 issue featuring Playmate Teddi Smith, in his MIT master's thesis on image dithering. History īefore Lenna, the first use of a Playboy magazine image to illustrate image processing algorithms was in 1961. "I didn't want to be called Leena ," she explained. ![]() The spelling "Lenna" came from the model's desire to encourage the proper pronunciation of her name. Forsén herself has asked for the image to be retired. The continued use of the image has attracted controversy, on both technical and social grounds, and many journals have discouraged or banned its use. It is a picture of the Swedish model Lena Forsén, shot by photographer Dwight Hooker, cropped from the centerfold of the November 1972 issue of Playboy magazine. Lenna (or Lena) is a standard test image used in the field of digital image processing starting in 1973, but it is no longer considered appropriate by some authors. (Click on the image to access the actual 512×512px standard test version.) Image of Lena Forsén used in many image processing experiments. For other uses, see Lenna (disambiguation). ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |