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Use the Track Display panel

Tracking

Import track points

 

User Guide > Dynamics and Effects > Live > Tracking > 

Track Options panel

The Track Options control panel includes various settings that affect tracking. You may want to experiment with these options if you are having problems tracking.

Point List

Displays the list of tracked points.

Select All

Automatically selects all track points in the list.

Select None

Automatically deselects all track points in the list.

Global Illumination

When set to Corrected, Live automatically corrects for changes in global illumination. For example, if a shadow or light glare appears for some of the frames, the tracker compensates for the change in lighting. When set to Not Corrected, Live does not correct for changes in luminance. Set Not Corrected if you want the tracker to use a more exact pattern match.

Color Space

Allows you to select between Full and Reduced color space. Full uses the full color table that correlates to the original image. Reduced uses a reduced color table when matching to the original image. Full helps the tracker distinguish between features with similar shape but different colors. Reduced helps the tracker with subtle features, such as dark green leaves over dark brown ground.

NoteThe Reduced setting may cause errors if you are using images with one color channel removed, such as the blue channel. In this case, use the Full setting.

Blur Radius

By default, the tracker blurs images to compensate for interference, or noise, such as filmgrain. You don’t actually see the blur (it is done in memory only), but it helps the tracker stay on target. You can control the amount of blur by adjusting the Blur Radius. For example, if you are tracking a subtle feature, the default amount of blur may be too much. A value of zero disables the blur.

Use Rotate, Use Scale

The target box automatically adjusts in shape to compensate for rotation or scale changes in the target image. This feature helps with the most common reason for tracking failures: shape changes in the feature you are tracking. Adjust the Use Rotate and Use Scale settings to control the amount of rotation or scale. If you find the tracker is falling off target, adjusting the value for these settings may help.

Subpixel Precision

Allows you to define a resolution for subpixel tracking. Smaller values take longer, but might be more accurate.

Update Behavior

Controls the way the tracker updates the target pattern as it changes.

None

The tracker keeps the initial pattern it snapped and does not update it.

Incremental

The tracker takes a new snap of the target after a specified number of frames. It is specified in the Update Increment setting.

Smart

The tracker takes a new snap of the target only when it differs from the original target by a given threshold amount. The threshold is specified in the Update Threshold setting.

Update Threshold

Allows you to specify a threshold for determining when the track pattern updates. The Update Behavior must be Smart.

Update Increment

Allows you to specify the number of frames for determining when the track pattern updates. The Update Behavior must be Incremental.

Failure Threshold

Controls the amount of difference the tracker permits between the original target and the subsequent frames. When the tracker cannot find a match within the threshold, the track fails.

Show Progress Image

Determines whether or not to display a progress image during tracking.

Image Buffer Factor

Controls the buffer size, in pixels, that Live adds around the search region when it creates a Pointblast movie. For example, if the search region size is 50 x 60 pixels, and the factor is 1.5, the movie display is 75 x 90 pixels.

Image Zoom Factor

Indicates the magnification of the progress image

Make Movie

Determines whether or not to create and display a Pointblast movie when the tracker finishes.