The Vectorscope YUV is a specialized tool within the Lumetri Scopes panel that measures the chrominance (color information) of a video signal. It displays this data on a circular chart, or graticule, which resembles a color wheel. The angle of the signal's trace on the scope indicates the hue (the specific color), while the distance of the trace from the center represents the saturation (the intensity of the color). This allows for precise, objective evaluation of color balance, saturation levels, and specific hues like skin tones, which are typically aligned along the "I-Line" or skin-tone line.

B: Lumetri Scopes are designed to analyze rasterized video signals, not the mathematical vector data from files like Adobe Illustrator.

C: The Vectorscope specifically displays chrominance (color), not luminance (brightness). Luminance is measured by scopes like the Waveform (Luma).

D: This describes the function of a Waveform scope, which plots luminance values horizontally, corresponding to the left-to-right positions in the video frame.

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1. Adobe Premiere Pro User Guide. "Measure video with Lumetri Scopes." Adobe

Inc. Accessed May 2024.

Section: Vectorscope. The documentation states

"A vectorscope measures the hue and saturation of the colors in an image. It measures the overall chrominance of an image... The vectorscope displays a circular chart

like a color wheel

that shows the chrominance information of your video." This directly supports the description in option A.

2. Adobe Help Center (helpx.adobe.com). "Overview of Lumetri Scopes." Adobe

Inc. Accessed May 2024.

Section: Vectorscope. This resource explains

"The Vectorscope measures hue and saturation on a circular scale... The angle of the color represents the hue

and the distance from the center represents the saturation. The further out from the center the signal extends

the more saturated the color is." This confirms that the scope's function is to display chrominance on a circular chart.