Color Correction - Nuke 101: Professional Compositing and Visual Effects - page 180

10. Click the top half of the pipe going into CurveTool1, which will enable you to
move it to the output of Merge3.
11. Double-click CurveTool1 to display its Properties panel in the Properties Bin.
Switch to the CurveTool tab (the first one), click Go! again, and click OK.
12. Switch to the MaxLumaData tab again and have a look ( FIGURE 4.33 ) .
Figure 4.33. The updated CurveTool1's MaxLumaData tab.
You can see now that the minimum values are far from being all 0. You are now
getting a true result showing the lightest and darkest pixels. Let's make use of
them.
13. Close all Properties panels in the Properties Bin to clear some room.
14. Double-click CurveTool1, and then double-click Grade1.
15. View Merge1 in the Viewer.
16. Clickthe4iconnexttoGrade1'sBlackpoint,Whitepoint,Lift,andGaintoenable
the four fields.
17. Ctrl/Cmd-dragfromCurveTool1'sMinimumLuminancePixelvalue'sAnimation
menu to Grade1's Blackpoint Animation menu and release the mouse button to
create an expression link between them.
18. Do the same from Maximum Luminance Pixel value to Whitepoint ( FIGURE
4.34 ) .
Figure 4.34. The green arrow shows the expression link between the two
nodes.