Digital Cinematography, 2nd Edition

Understanding Digital Theory 7

industries, while the Cineon le format is more

specic to digital lm.

Figure 1.17 Cineon 10-bit log encoding curve.

10-Bit Log Cineon/DPX File Format

In a Cineon (.cin) or (.dpx) le, each channel

(R, G, B) is encoded with 10 bits, typically in a

range from a “black point” at code value 95 to

“diffuse white” at code value 685 on the 0–1023

scale of code values. Code value 685 diffuse

white is mapped to record a diffuse white reec-

tion, such that rays incident on a white surface

are scattered at many angles in a Lambertian

reection, equal in luminance ...