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The Crop feature

From: Nuke 6 New Features

Video: The Crop feature

You can add holdout and garbage mattes to Keylight as well as crop the green screen. You can play along too by getting these two images out of the Keylight media folder. The Crop feature in Keylight is mainly used when you have a situation like this where the green screen doesn't fill the entire frame. So let's take a look at how it's used. With this selected, we will go to the Keyer tab, add the Keylight mode and it hooks into the Source input and hookup the background input.

The Crop feature

You can add holdout and garbage mattes to Keylight as well as crop the green screen. You can play along too by getting these two images out of the Keylight media folder. The Crop feature in Keylight is mainly used when you have a situation like this where the green screen doesn't fill the entire frame. So let's take a look at how it's used. With this selected, we will go to the Keyer tab, add the Keylight mode and it hooks into the Source input and hookup the background input.

Now unfold the Crops menu and here we set the Left, Right, Top and Bottom margins of the crop, the color of the crop and how are we going to do the crop. I will start by setting the Edge Colour to a bright red. That will make it easier to follow. I move the Left slider here to define the left edge of the crop, and the Right slider to move the right edge of the crop and of course we have a Bottom and Top slider. The idea is to set the Edge Colour to match the color of the green screen and we can do that by turning on the Eyedropper and doing the Alt+Command+Click and that of course will flood-fill the colored edges with the same color you pick off the green screen.

You can also open the color picker and dial in any color that you want. So we will close that, and now let's pull a key. We will select the Screen Colour eyedropper, we will do Shift+Alt+Command to drag a color sample box and put that into the screen color. I will turn off the Eyedropper and close the color sample box. At the moment, the method used for the horizontal crop or the X Method is Colour.

Let's switch over to looking at our Screen Matte to see the results. I can choose one of four methods for the horizontal crop right here. The default is Colour. If I do Repeat, that means it's going to take the edge pixels along the crop and just repeat them all the way to the edge of the frame. If I choose Reflect, it draws a line down the edge and does a mirror image. If I choose Wrap, this edge is really been picked up from this corner over here, the whole image was being picked up and copied over here.

Same thing on the other side. You can also set the Y Method for any one of four techniques you want. In the next video, we will take a look at holdout mattes and garbage mattes.

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This video is part of

Image for Nuke 6 New Features
Nuke 6 New Features

59 video lessons · 5821 viewers

Steve Wright
Author

 
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  1. 7m 45s
    1. Welcome
      1m 56s
    2. What is NukeX?
      5m 0s
    3. Using the exercise files
      49s
  2. 1h 11m
    1. Learning the interface
      5m 15s
    2. Drawing shapes
      1m 41s
    3. Editing shapes
      5m 1s
    4. Keyframe animation
      6m 4s
    5. Property panel tabs
      7m 8s
    6. The shape list
      4m 26s
    7. Output settings
      1m 11s
    8. Workflow examples
      5m 33s
    9. Creating garbage mattes
      4m 55s
    10. Drawing strokes
      4m 16s
    11. Editing strokes
      4m 30s
    12. The Clone tool
      1m 37s
    13. Editing the Clone tool
      2m 54s
    14. The Reveal tool
      9m 2s
    15. The Blur tool
      2m 21s
    16. The output mask
      2m 57s
    17. The Dodge tool
      2m 32s
  3. 27m 38s
    1. Basic compositing
      3m 51s
    2. Using the Screen controls
      2m 50s
    3. Using the Screen Matte controls
      3m 37s
    4. The Crop feature
      2m 28s
    5. Holdout and garbage mattes
      2m 19s
    6. The Tuning controls
      1m 58s
    7. The Bias controls
      2m 37s
    8. Screen replacement
      2m 15s
    9. Multipass keying
      4m 37s
    10. Color-correcting the foreground
      1m 6s
  4. 17m 8s
    1. Basic setup
      3m 24s
    2. The Ultimatte workflow
      5m 18s
    3. Using the matte tools
      4m 16s
    4. Spill suppression
      4m 10s
  5. 28m 8s
    1. Overview
      2m 42s
    2. Pre-processing the greenscreen
      3m 25s
    3. Creating specialized keys
      7m 14s
    4. The preliminary composite
      6m 14s
    5. Creating supplemental keys
      6m 22s
    6. Alternative workflows
      2m 11s
  6. 24m 39s
    1. Editing control points
      4m 49s
    2. Editing the warp grid
      2m 52s
    3. Keyframe animation
      4m 42s
    4. Morphing
      10m 7s
    5. Additional tabs
      2m 9s
  7. 33m 20s
    1. Drawing splines
      6m 3s
    2. Drawing open splines
      2m 0s
    3. Limiting the warp
      7m 1s
    4. Warping to a target image
      5m 54s
    5. Morphing
      8m 1s
    6. The correspondence points
      4m 21s
  8. 9m 3s
    1. The MotionBlur2D node
      5m 55s
    2. Using the VectorBlur node
      3m 8s
  9. 10m 29s
    1. The ZBlur node
      6m 33s
    2. Image-based blurs
      3m 56s
  10. 11m 13s
    1. Navigating the Dope Sheet
      5m 17s
    2. Shifting keyframes
      5m 56s
  11. 5m 22s
    1. Making a group
      2m 50s
    2. Making a gizmo
      2m 32s

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