Why 4K? ghj / 2009.03i1 Why 4K? George Joblove Sony Pictures Technologies.

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Presentation transcript:

Why 4K? ghj / i1 Why 4K? George Joblove Sony Pictures Technologies

Why 4K? ghj / i2 Motion-Picture Distribution Studios, Distributors Motion- Picture Masters (Intermediates) Theaters Release prints

Why 4K? ghj / i3 Motion-Picture Distribution Studios, Distributors Motion- Picture Masters (Intermediates) Theaters Release prints 20th-century standard: 35-mm film

Why 4K? ghj / i4 Motion-Picture Distribution Studios, Distributors Motion- Picture Masters (Intermediates) Theaters Release prints 20th-century standard: 35-mm film 21st-century standard: DCP (Digital Cinema Package)

Why 4K? ghj / i5 Motion-Picture Distribution 2048 pixels wide 1080 pixels high 4096 pixels wide 2160 pixels high “2K”“4K”  A DCP may be either of two resolutions:

Why 4K? ghj / i6 Why 4K?  Human visual acuity  Modern cinema theater layout  Maximizing quality of our work on the screen  Maximizing quality of what goes into the vault for future use

Why 4K? ghj / i7 Human Visual Acuity 360°

Why 4K? ghj / i8 Human Visual Acuity 360° 1°

Why 4K? ghj / i9 360° 1° 1′1° Human Visual Acuity Magnification

Why 4K? ghj / i10 Human Visual Acuity  ‘Normal’ (‘20/20’ [US/UK], ‘6/6’ [EU], ‘1.5/1.5’ [JP] ) human vision resolves 30 cycles (line-pairs) per degree, or one line per arcminute  This corresponds to about: ■ 486 lines (NTSC)  576 lines (PAL) at 7 picture-heights at 6 picture-heights ■ 1080 lines (HDTV or 2K DCI 1.85:1) at 3 picture-heights ■ 2160 lines (4K DCI 1.85:1) at 1½ picture-heights

Why 4K? ghj / i11 Modern Cinema Design, Stadium Seating

Why 4K? ghj / i12 Modern Cinema Design, Stadium Seating PHOTO: BAM ROSE CINEMAS

Why 4K? ghj / i13 Today’s Demonstration  Images ■ Shot on still cameras –Sony  900 [6K  4K Bayer] and digital Hasselblad [7K  5K Bayer] ■ Gamma-converted to linear floating-point ■ Cropped to 1.85:1 and down-res’ed to DCI 4K (3996  2160) ■ Color-space- and gamma-converted from sRGB to DCI X'Y'Z' ■ Converted to 16-bit integer per channel, saved in TIFF format ■ Created left/right mirrored image by pixel swapping ■ Created DCI package (4K) from each still image and mirror

Why 4K? ghj / i14 Today’s Demonstration  Projection Screen: 20 ft (6 m) wide, matte 1.0, non-perforated Left-side projection: 2KRight-side projection: 4K4K DCP Doremi DCP2000Sony LMT-300 Christie CP2000-ZX DLPSony SRX-R320 SXRD 2048   2160 ~14.6 ftL = ~50 cd/m²