If you don’t want to track all regions of your image, for example, if there are moving objects or reflections in the image, you can attach a matte to the Mask input to define image regions that should not be tracked. You can also use the source input’s alpha channel as a matte.
| 1. | If you want to use a separate matte for masking, connect it to the Mask input in the Node Graph. |
| 2. | In the properties panel, set Ignore Mask to the component you want to use as a mask: |
• None - Track features in the whole sequence.
• Source Alpha - Use the alpha channel of the source clip to define which areas to ignore.
• Source Inverted Alpha - Use the inverted alpha channel of the source clip to define which areas to ignore.
• Mask Luminance - Use the luminance of the mask input to define which areas to ignore.
• Mask Inverted Luminance - Use the inverted luminance of the mask input to define which areas to ignore.
• Mask Alpha - Use the mask input alpha channel to define which areas to ignore.
• Mask Inverted Alpha - Use the inverted mask input alpha channel to define which areas to ignore.
NOTE: PointCloudGenerator can track multiple ranges, adding the new points to the existing cloud, so feel free to mask and re-track as much as necessary.