In this week we learn how to use 3D Tracking.
LensDistortion
The LensDistortion node (NukeX and Nuke Studio only) estimates the lens distortion in a given image, either through Grid Detection or manual Line Detection. The warp can then be used to add or remove distortion or produce an STMap in the motion channel for use elsewhere.
STMap
The STMap node allows you to move pixels around in an image. STMap uses two channels to figure out where each pixel in the resulting image should come from in the input channels. You can use the Copy node to merge the two distortion channels in with your image channels and then select the two channels in the U and V selection boxes. The U and V values are the absolute position of the source pixel. The values are normalized to be between 0 and 1, where 0 is the bottom left corner of the input image, and 1 is the top right corner.
Simple 3d Scene and Complex 3d Sense
Camera Tracker
CameraTracker (NukeX and Nuke Studio only) is designed to provide an integrated camera tracking or matchmoving tool, allowing you to create a virtual camera whose movement matches that of your original camera. Tracking camera movement in a 2D footage enables you to add virtual 3D objects to your 2D footage.
Writegeo
Writes out geometry to a specified file. You can export:
- OBJ files
- FBX files containing meshes, point clouds, cameras, lights, and axes.
- Alembic (.abc) files containing meshes, point clouds, cameras, or axes.
You can write the geometry by clicking the Execute button and specifying a range of frames you want written or by running the Nuke script with the -x switch.