Chroma and luma keying – chroma key mode
After selecting the operating mode of the key, the next step is to choose a background color. Click on the button Chrominance Keyer below the Mode button.
A window will appear, as shown below. Now you should choose a background color. There are two options: blue and green. You can change the background color by clicking on a rectangle with a green color. The color of the rectangle also changes then.
In the case of uneven color of the keyed background, you have a button: Detect Color at your disposal. It calculates LRGB parameters of the background on the basis of automated averaging. If reception of these parameters is not successful, the user is notified via a message window and then the default color is set. The Default Color button is used to select the default color.