Archive:Kdenlive/Manual/Effects/Misc/Vectorscope
Misc - Vectorscope
This is the frei0r.vectorscope plugin.
Not to be confused with View>Vectorscope described on Granjow's blog
It is recommended to use the vectorscope from View>Vectorscope, because the effect Misc - Vectorscope is not correct - it uses a graticule from an analog NTSC vectorscope, but equations from digital video (Source: this forum post.)