R&D Report 1966-13 : Electrical correction for colour errors due to lack of far-red sensitivity in Plumbicon colour cameras. G.D. Monteath
Lack of sensitivity in the long-wavelength reds causes errors to chrominance and luminance in colour television camera employing plumbicon tubes. A simple non-linear matrix provides a useful degree of correction by adding to the red signal a proportion of the difference between the red and green signals when this difference is positive. Some extensions of this proposal are also suggested.