Available as a chart in the Scope panel, Vectorscope presents color and saturation data measured via the image signal. Its representation allows for accurate evaluation of color and thus aids workflows where it is challenging to judge the output by eye.
The Vectorscope pie chart is divided into six parts representing the main colors of the RGB color space (red, green, blue) as well as their inverse equivalents (cyan, magenta, yellow). The chart places signal information from the image according to where its value sits in relation to the color space. For example, if there is a significant amount of blue color in the image, its representation will appear in the region of the blue line.
Additionally, the chart includes the I line, which may be used as an aid during correcting skin tones; the idea here is to adjust skin colors in such a way that their representation sits along this line.