O_VerticalAligner Example

In this example, we correct the vertical alignment of a stereo image using the Global Alignment mode. The image used here can be downloaded from our website. For more information, please see Example Images.

Step by Step

1.

Launch Nuke. Open the project settings (press S on the Node Graph), select the Views tab, and click the Set up views for stereo button.

2.

Import the steep_hill.exr image and connect it to a Viewer. The image includes both the left and the right view.

3.

Select Ocula > Ocula 4.0 > O_Solver to insert an O_Solver node after the stereo clip. See Solver for more information.

4.

Click Key Frame to set at least one keyframe.

5.

Insert an O_VerticalAligner (Ocula > Ocula 4.0 > O_VerticalAligner), followed by an Anaglyph node (Views > Stereo > Anaglyph) after O_Solver.

Note:  The Anaglyph node is for illustrative purposes in this example. You could just as easily use the DisparityReviewGizmo to view the alignment.

6.

By default, O_VerticalAligner is in Global alignment mode with the Local alignment checkbox disabled. In this mode, O_VerticalAligner applies a global image transform to align the feature matches generated by the upstream O_Solver node. In Global alignment mode, O_VerticalAligner does not need disparity vectors upstream.

7.

To see the effect more accurately, select the O_VerticalAligner node and press D repeatedly to disable and enable the node. With the node disabled, the views remain vertically misaligned. However, when you enable the O_VerticalAligner node, the views align nicely.

The zoomed in image with the O_VerticalAligner node disabled.	The zoomed in image with O_VerticalAligner enabled.