Blackmagic Design Video Assist Manual De Instalación Y Funcionamiento página 26

Vectorscope
The vectorscope measures the overall range of color hue and saturation within an image.
Blackmagic Video Assist has a traditional vectorscope, emulating a trace drawn graph,
with 100 percent color bar saturation targets positioned at the graticule markers surrounding
the graph.
Heavily saturated colors in the frame stretch those parts of the graph closer to the edge, while
less saturated colors remain closer to the center of the vectorscope, which represents
0 saturation. By judging how many parts of the vectorscope graph branch out at different
angles, you can see how many hues there are in the image, with the specific angle of each part
of the graph showing you which hues they are.
Additionally, by judging how well centered the middle of the vectorscope graph is relative to the
center of the vectorscope, you can get an idea of whether there is a color imbalance in the
image. For example, if the vectorscope graph is off centered, the direction in which it leans lets
you know that there is a color cast or tint in your image.
While color balance can be monitored on both the RGB parade display and vectorscope
display, color balance issues will often be easier to see in the vectorscope display.
The vectorscope displays the overall range of
color hue and saturation within the image
TIP When monitoring a video signal that contains skin tone, you will want to keep
your warm color saturation along a line at approximately 10 o'clock on the vectorscope.
This is known as the "fleshtone line" and is based on the color of blood beneath the
skin's surface. The fleshtone line is therefore applicable to all skin pigmentations and
is the best way to ensure the skin tones look natural.
Zooming into the Vectorscope Graph
The 'zoom' feature on the vectorscope display lets you magnify the graph so you can get a
closer look at the color information in your image. This is helpful when monitoring images that
are desaturated, as they can typically appear as a small cluster of data around the center of
the chart.
Changing Settings 26