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O_DepthToDisparity

Many Ocula nodes rely on disparity maps to produce their output. Usually, disparity maps are created using a combination of the O_Solver and O_DisparityGenerator nodes.

However, if you have a CG scene with stereo camera information and z-depth map available, you can also use the O_DepthToDisparity node to generate the disparity map. Provided that the camera information and z-depth map are correct, this is both faster and more accurate than using the O_Solver and O_DisparityGenerator nodes.

Inputs and Controls

Connection Type	Connection Name	Function
Input	Camera	A Nuke stereo Camera node. This is the camera the scene was rendered with. In most cases, you would import this into Nuke from a third-party 3D application. For information on how to do this, see the Nuke User Guide.
Depth	This is a stereo pair of images (usually, a scene you’ve rendered from a 3D application). In the depth channel, there should be a z-depth map for each view. TIP: If this input is an .exr file, the z-depth map may already be embedded in the clip. If you’re using another file format and have saved the depth map as a separate image, you can use a Nuke Shuffle node (Channel > Shuffle) to get the z-depth map in the depth channel of the Depth image. For information on how to do this, see the Nuke User Guide.

Connection Type

Connection Name

Function

Input

Camera

A Nuke stereo Camera node.

This is the camera the scene was rendered with. In most cases, you would import this into Nuke from a third-party 3D application. For information on how to do this, see the Nuke User Guide.

Depth

This is a stereo pair of images (usually, a scene you’ve rendered from a 3D application). In the depth channel, there should be a z-depth map for each view.

TIP: If this input is an .exr file, the z-depth map may already be embedded in the clip.

If you’re using another file format and have saved the depth map as a separate image, you can use a Nuke Shuffle node (Channel > Shuffle) to get the z-depth map in the depth channel of the Depth image. For information on how to do this, see the Nuke User Guide.

Control (UI)	Knob (Scripting)	Default Value	Function
O_DepthToDisparity Tab
Views to Use	viewPair	Dependent on Source	Sets the two views you want to use to create the disparity map. These views will be mapped for the left and right eye.