Reports from the Field

Working Beyond RGB

On one hand, as it is current practice since years in other fields of fine arts’ conservation and restoration, there is an increasing interest in working with multispectral content for moving images as well.

On the other hand, when working with old colour processes, like the additive ones used during the first half century of cinema, it’s often more effective to handle independently the luma Y′ component and the chroma C1 and C2 components. Working with CO and CG is easier than working with the common CB and CR, because the de-correlation of the colour planes is better and the transcoding from and to R′G′B′ is faster. Therefore one can check quicker the results on modern monitors.

Some good reasons to look at colours in film conservation and restoration from a wider point of view!

When and Where

A short talk with demonstrations by Reto Kromer, followed by an informal Q&A session and light refreshments, on Friday the 14th of June 2019, starting at 11 o’clock sharp, at AV Preservation by reto.ch in Écublens (a suburb of Lausanne, Switzerland).

As usual, the admission is free, but an inscription by email is required, because only six places are available at our small facility. Note that this will be a technical meeting and the attendees should be familiar with high-school maths, including functions, linear transformations and elementary matrix operations.


2019–06–02