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2 Do one or both of the following:
■ Enable Plot and then sample the result clip.
To:You can:
Sample a single pixel in the image. You can drag through the image until you locate
the pixel you want to sample.
Click-drag
Sample an average taken from a range of colours in the image.Ctrl-drag
A red vertical line appears in the 2D luma histogram indicating the luma of the sample. The sampled
colour is also outlined in red in the 2D or 3D vectorscope. In the 2D vectorscope, you see the sample
in terms of hue and saturation. In the 3D vectorscope, you see it in terms of HLS. If you are plotting
a colour in a 16-bit floating point image that is out of the 0:1 range, the red outline appears outside
of the vectorscope.
■ Enable Ref and then sample the reference clip.
To:You can:
Sample a single pixel in the image. You can drag through the image until you locate
the pixel you want to sample.
Click-drag
Sample an average taken from a range of colours in the image.Ctrl-drag
A yellow vertical line appears in the 2D luma histogram and the sampled colour is outlined in yellow
in the 2D or 3D vectorscope. If you are referencing a colour in a 16-bit floating point image that is out
of the 0:1 range, the yellow outline appears outside of the vectorscope.
Selecting Colour Ranges for Colour Correction
With some images or clips, you may need to perform selective colour correction—where you modify a range
of colour, as opposed to the entire clip or image. Use the tools in the Selective menu to create selectives.
Selectives are generated mattes used to isolate colour ranges for selective colour correction.
In the Selective menu, you can:
■ Create and refine a matte using tolerance and softness to define the range you want to modify.
■ View a matte, a selected colour range, or the result.
■ Enable mattes to apply the selective colour correction to the result image. Disable mattes to remove the
selective colour correction from the result image.
TIP Set the image window to 2-Up view (Alt+2) so that you can create your matte in one viewport while
simultaneously monitoring the result in the other.
Generating Mattes
Mattes can be used for several purposes. For instance, use a matte to remove colour spill, hue shift an object
in an image for artistic effect, or match colours in a specific range. Use mattes to define the range of colour
you want to modify in the result clip.
You can generate up to three mattes using the Selective menu.
About the Colour Warper | 815