Camera Tech and Colour Science
Taught by Charles Poynton
- Course Number:
- Software Version:
- Original Run Date:
- January 2012
- 7 hours 55 minutes
How many stops of exposure latitude does a digital camera offer? What exposure index should be used? What is the“film look” and where should it be imposed? Why does noise arise, and what can be done to minimize it? Should I record and process “log” or “linear”? Is there one kind of “log” and one kind of “linear,” or are those terms ambiguous? Is it valuable to have an on-set display? Where do the LUTs go, and who should determine their content? Under what conditions is on-set colour grading useful?
Poyton will discuss logarithmic coding, camera sensitivity and ISO/EI ratings. He will describe the zone system, and discuss what aspects of that system are valuable in connection with digital acquisition. In addition, the course will cover the tone scale and colour modifications that impart the “film look,” and the roles of camera controls (gamma, knee, slope) and 1D and 3D lookup tables in achieving these modifications.
This course will be suitable for people involved with:
- Cinematographers, assistant cinematographers, and colourists
- HD engineers and Digital Imaging Technicians (DITs)
- Post-production and visual effects supervisors, and post/VFX engineers
- Digital cinema, digital video, and CGI/VFX software developers
- The course will be technical and it will show many graphs and several equations!
Class 1Understanding the colour spectrum and the theory of how colours can be represented electronically.
Class 2Subtractive filter mixing.
Class 3Color transforms
Class 4Lightness/Colour/Video terminology, code 100 issue in linear coding and different notions of LOG/LIN.
Class 5Perceptual uniformity and Video/HDTV camera "Gamma" controls.
Class 6Display gammas for different viewing conditions.
Class 7Power functions of gamma and video color coding.
Class 8Appearance effects and how to compensate for them; Wide colour gamut
Class 9Color management, LUTs and profile building.
Class 10The ACES workflow.