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The American Society of Cinematographers Color Decision List (ASC CDL) is a format for the exchange of basic primary color grading information between equipment and software from different manufacturers. The format defines the math for three functions: Slope, Offset and Power.
Color grading is one of the most labour intensive parts of video editing. Traditionally, color grading was done towards practical goals. For example, in the film Marianne, grading was used so that night scenes could be filmed more cheaply in daylight. Secondary color grading was originally used to establish color continuity; however, the trend ...
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Color grading is done by varying the amount of red, green, and blue light used to expose the intermediate. The digital intermediate process uses digital tools to color grade, which allows for much finer control of individual colors and areas of the image, and allows for the adjustment of image structure (grain, sharpness, etc.).
The Lustre architecture uses CPU and GPU optimizations to obtain realtime playback on high resolution files, as required for digital cinema color grading. The original control surface was the Tangent Devices CP100. Later Autodesk developed the Autodesk Control Surface manufactured by Tangent Devices.
A Shadow Telecine in a color correction suite. The suite may have an either a non-linear editing system (NLE) or linear editing system to control the source and record device. This may be internal to the color grading device, as in a Pandora's Pogle or Da Vinci's 2k or external, as in Da Vinci's TLC (telecine controller).
In photography, mireds are used to indicate the color temperature shift provided by a filter or gel for a given film and light source. For instance, to use daylight film (5700 K) to take a photograph under a tungsten light source (3200 K) without introducing a color cast , one would need a corrective filter or gel providing a mired shift
For example, if the lightfastness of the colourant is indicated to be 5 on the Blue Wool scale, it can be expected to fade by a similar amount as the strip number 5 in the Blue Wool test strip set. The success of the test can be confirmed by comparing the test strip set with the reference set that was stored protected from the light. [12] [13]