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Full gamut colour recovery
Richard Russell, 5th May 2008 As Andrew Steer and I have demonstrated, colour recovery has proved to be remarkably straightforward, so long as you don't need to know the signs of U and V -
Ongoing developments
In the latter part of 2008 developments to the Colour Recovery software application had to take second place to actually using it to process programmes such as the Dad's Army and Doctor Who episodes -
Full gamut colour recovery (continued)
...continued from Full gamut colour recovery Richard Russell, 30th May 2008 -
Tools and utilities
In addition to the main Colour Recovery software application, a number of associated software tools have been developed. Use of those tools can considerably improve the quality of the final colour-recovered programme. This utility -
How colour recovery works
This page describes the method of operation of Richard Russell's Colour Recovery process. When a PAL-coded colour signal is viewed as a composite signal (for example on a monochrome television monitor) the chrominance -
Richard Russell's early experiments
Richard Russell, 29th April 2008 Encouraged by Andrew Steer's results, I thought I would have a go at reproducing something myself. I only received the DVDs from James yesterday and all the code has -
Processed programmes
On this page are listed those programmes that have undergone Colour Recovery processing: Processed: October 2021 Duration: 45 minutes Broadcast 25th December 2021, BBC2, 19:45 -
The Unofficial Colour Recovery Wiki
I have set up this Wiki, not in competition with the official Colour Recovery Working Group Wiki, but to provide an alternative place to record developments in Colour Recovery technology which is independent of any -
Response curves
This page shows the response curves of the main filters used in Richard Russell's Colour Recovery process (software versions 1.30a and later; in earlier versions the chrominance bandpass filters were wider: the horizontal -
Full gamut colour recovery (yet more)
...continued from Full gamut colour recovery (continued) 18th June 2008 -
Source file specification
The input file containing source material for Colour Recovery should accord with the following specification: 1.1 The Colour Recovery process uses input frames sampled at 1920 pixels per line and 1080 lines per frame -
Spectra of film recordings
Here are some 2D spectra of film recordings containing'chroma patterning'. They are of particular interest because they show, amongst other things, the amount of chrominance energy present at 216 c/aph (essential to the -
Process noise spectra
The following 2D spectra show the various stages in the Colour Recovery process, with the input file consisting of white noise. In all cases DC is in the centre of the plot, the horizontal frequency -
Limitations of the process
Because of these and other effects one can only determine how successful the process will be in a particular case by trying it. The film recorders used seem to have been quite variable, resulting in -
Software versions
This page records the major versions of Richard Russell's Colour Recovery software application: The contents of the ZIP file should be extracted to a suitable location on your PC, preferably a dedicated folder created
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