Matrox MXO2 Guia do Utilizador descarregar pdf (Página 129)

109

Creating a Matrox primary color correction

Click the R, G, or B button to select the curve corresponding to the color channel

you want to adjust, or click the

Master button for the master curve, and then drag

the curve to obtain your desired effect. For example, click the

R button and drag

the top right end point towards the top left of the grid to increase the slope of the

curve and add red to the clip. Drag that same point towards the bottom right of

the grid to decrease the slope of the curve and remove red from the clip. Clicking

the

Enable button will show/hide any adjustments you have made to the RGB

channels at any time (you do not need to click

Enable to start adjusting the

curves).

¥Tip For increased precision, hold down the ALT key while you drag the curve,

or the

CRTL key to change your cursor into a crosshair that will help you align

your curve to the grid.

You can add up to 14 control points to each curve in addition to the two default

end points. These control points act as anchors that allow you to lock your curve

so adjustments can be applied only to specific tonal ranges. Click on a curve to

add control points, and hold the

SHIFT key while clicking a control point to

delete it (end points cannot be deleted). Adjusting the points in the top right area

of the grid affects highlights, the middle area affects midtones, and the bottom

left area affects shadows. For example, the following S-shaped master curve adds

contrast in the midtones range, without creating any completely black or white

areas.

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Matrox MXO2 Guia do Utilizador Página 129