The Auto Matte command generates a high-contrast matte from a clip. The controls are described as follows.
- Minimum
-
Specifies the minimum colour value for the matte. Any pixel with a luma value below the minimum value is set to black. The
minimum can be set to any value between 0 and 255 in 8-bit mode, or between 0 and 4095 in 12-bit mode.
- Maximum
-
Specifies the maximum colour value for the matte. Any pixel with a luma value above the maximum is set to white. The maximum
can be set to any value between 0 and 255 in 8-bit mode, or between 0 and 4095 in 12-bit mode.
- Gain
-
Boosts the matte. Any pixel with a luma value between the minimum and maximum values is multiplied by the Gain and the new
value is assigned to the resulting pixel. Using a low value for the Gain produces a soft matte with more grey levels. Using
a high value produces a matte with fewer grey levels. Gain is expressed as a percentage value. The default value of 100% has
no effect on the image since luma values are multiplied by 1.
To use the Auto Matte command:
- Click Auto Matte in the Processing menu.
The Auto Matte menu appears.
- Set the values in the Minimum, Maximum, and Gain fields.
- Select the source clip.
- Select the destination reel.
A matte clip appears on the destination reel.