Waveform monitor display showing chrominance values in YUV color space with six primary color target points at 60° intervals; used for color correction and broadcast compliance.
Technical Details
The vectorscope operates with the YUV color space, displaying the U and V components (Cb/Cr in digital signals) on the horizontal and vertical axes. The six primary and secondary colors (red, magenta, blue, cyan, green, yellow) are positioned at 100% saturation as fixed target markers at 60° intervals. Modern digital vectorscopes operate with 10-bit resolution and support various broadcast standards like Rec. 709, Rec. 2020, and DCI-P3. Scaling is typically done in IRE units (Institute of Radio Engineers), with 75% and 100% bars serving as reference values.
History & Development
Tektronix developed the first commercial vectorscope Model 520 for the television industry in 1968. The breakthrough came in 1974 with the Model 1480 Waveform/Vector Monitor, which combined both measurement devices. In the 1980s, vectorscopes became established as standard in television studios for compliance with FCC transmission standards. The transition to digital technology brought software-based vectorscopes in editing systems like Avid Media Composer and later in DaVinci Resolve starting in 2000.
Practical Application in Film
During the color grading of "Mad Max: Fury Road" (2015), Colorist Eric Whipp used vectorscopes to control the extreme orange-blue contrasts in the desert scenes. DoPs use vectorscopes on set to monitor skin tones, which should be located on a characteristic line between orange and red at approximately the 11 o'clock position. In post-production, the vectorscope enables precise color matching between different cameras or shots. Broadcast standards like EBU R103 prescribe maximum color deviations that can only be maintained through vectorscope control.
Comparison & Alternatives
While the waveform monitor displays brightness distribution, the vectorscope focuses exclusively on color information. RGB parades display the three color channels separately, whereas the vectorscope visualizes color relationships holistically. Modern false-color displays overlay exposure information directly in the camera image but do not replace the precise color analysis of the vectorscope. In HDR workflows, gamut scopes complement the traditional vectorscope with expanded color spaces.