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Download Nuke 5.1v5 User Guide
Transcript
COLOUR CORRECTION AND COLOUR SPACE NUKE 5. In the ColorLookup properties panel, press Ctrl+Alt (Cmd+Alt on a Mac) while clicking on the curve to set points at the places where the red, green, and blue lines intersect with the colour curve. sampled pixel values Figure 4-8: Viewing values from a sampled colour. 6. Edit the position of the points and adjust the tangent handles to adjust the curve shape for the colour correction. Making Hue, Saturation, and Value Adjustments For certain colour correction tasks like spill suppression, you ideally want to influence only a very narrow range of colour values. For such tasks, it’s often helpful to use effects that employ the Hue, Saturation, and Value (HSV) colour model. As its name indicates, the HSV colour model breaks colour into three components: • Hue, which refers to the colour’s location on the traditional colour wheel. • Saturation, which refers to the extent to which the colour has “soaked up” its hue. • Value, which refers to the brightness of the colour. Figure 4-9: Hue shift 143
