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1895

1895. 2000. diagramme de la CIE chromophores PAL / SECAM. couleurs additives. couleurs soustractives. couleurs additives : écran RVB. balayage. =. =. =. =. =. pixels. codage direct. 255 100 0. 50 150 100. 128 0 128.

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1895

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  1. 1895 2000

  2. diagramme de la CIE chromophores PAL / SECAM

  3. couleursadditives couleurs soustractives

  4. couleurs additives : écran RVB balayage = = = = = pixels

  5. codage direct 2551000 50150100 1280128 pixel 1,1 Rpixel 1,1 Vpixel 1,1 Bpixel 1,2 Rpixel 1,2 Vpixel 1,2 Bpixel 1,3 Rpixel 1,3 Vpixel 1,3 Bpixel 2,1 Rpixel 2,1 Vpixel 2,1 B... 25510005015010012801282550255... 2550255 51204204 0255255 2552040 255153204 01280 image numérique image visuelle fichier

  6. codage indexé 11 6 9 1 2552040 2 1532040 3 01280 4 0255255 5 51204204 6 51153102 7 255153204 8 2550255 9 1280128 10 255204153 11 2551020 12 153510 8 5 4 1 7 3 pixel 1,1pixel 1,2pixel 1,3pixel 2,1pixel 2,2pixel 2,3pixel 3,1pixel 3,2pixel 3,3 1169854173 image numérique fichier table des couleursLUT image visuelle

  7. image en pseudo-couleurs 420 35 200 160 260 360 400 115 160 LUT index image numérique pixel 1,1pixel 1,2pixel 1,3pixel 2,1pixel 2,2pixel 2,3pixel 3,1pixel 3,2pixel 3,3 42035200160260360400115160 pixel 1,3 pixel 1,3 valeur fichier 0 100 200 300 400 image visuelle correspondance

  8. vraies couleurscodage direct vraies couleurscodage indexé pseudo-couleurs

  9. résolution spatiale 25 x 25 100 x 100 50 x 50 200 x 200

  10. résolution en intensité 2 NG 8 NG 4 NG 256 NG

  11. histogramme 500 0 0 128 256

  12. palettes

  13. fenêtrage

  14. Lena Sjööblom, Playboy's Miss November 1972. In the early Seventies, an unknown researcher at the University of Southern California working on compression technologies scanned in the image of Lena's centerfold. Since that time, images of the Playmate have been used as the industry standard for testing ways in which pictures can be manipulated and transmitted electronically. Over the past 25 years, no image has been more important in the history of imaging and electronic communications.

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