To Set Up a Chroma Key in Advanced Mode

Tip: The Color Map feature gives you a visual representation of the areas in the video signal that fall within all the adjustment ranges.
Tip: Once you have set up the chroma key how you want it to appear, you can press and hold CHROMA KEY and press the KEY MEM button to store these settings. Pressing the KEY MEM button again will recall these setting for the chroma key.
  1. Press the SEL button on the Keyers module for the key you want to set up and select a video source on the Key bus.
  2. Press CHROMA KEY.
  3. Use the Key Mode knob to select Advanced.
  4. Use the Color knob select the color you want to key out. This is the background color of your Chroma Key that will be replaced.
  5. Press Initialize Key.
  6. Press Shadow and use the Range and Gain knobs to extract a shadow from the background. This is the actual shadow that the foreground subject is casting onto the screen.
    • Range — adjust the range of the Shadow colors. Increasing the range value widens the Shadow area by including lower-luminance background colors. The increased range comes as a result of colors moving from the Translucent area to the Shadow area. Decreasing the range value narrows the Shadow area by excluding high-luminance colors. These excluded colors move back into the Translucent area.
    • Gain — adjust the shadow appearance. Increasing the gain value creates darker shadows, and decreasing the gain value creates lighter shadows.
  7. Press Translucency and use the Gain knob to adjust the appearance of clear items such as eye-glass lenses.
    • Range — adjust the range of the Translucent colors. Increasing the range value widens the Translucent area by including more hues from the Background range (the lower-end of the range is defined by the Shadow range you just set). Decreasing the range value narrows the Translucent area by excluding hues.
    • Gain — adjust the appearance of the Translucent colors. Increasing the Gain value causes the translucent colors to appear more opaque. Decreasing the Gain value causes the translucent colors to appear more transparent.
  8. Press Transition and use the Gain knob to adjust the appearance of the Transition area. The Transition area is the range of pixels that are left over (i.e. not in the Shadow or Translucency area).
    • Gain — adjust the appearance of the Transition colors. Increasing the gain value makes the Transition area pixels more opaque. Decreasing the gain value makes the Transition area pixels more transparent.
  9. Press Background and use the Sat Range, Positive Hue, and Negative Hue to adjust the Background area. Background elements are those pixels in the source video that are the same color as the one you chose to key out. Note that the Shadow and translucent areas are completely contained within the Background area.
    • Sat Range — adjust the saturation range of the background color. Increasing the saturation range value includes a wider range of saturation values to be included in the background. Decreasing the saturation range value includes a narrower range of saturation values to be included in the background.
    • Positive Hue — adjust the range of hues that are included in the Background, expanding clockwise around the color wheel.
    • Negative Hue — adjust the range of hues that are included in the Background, expanding counter-clockwise around the color wheel.
  10. Press More.
  11. Press Foreground and use the Clip, Hue, and Reject knobs to adjust the Foreground area. The Foreground settings allow you to adjust the range of colors which are considered Foreground colors, and are keyed fully on.
    • Clip — adjust the foreground clipping. Increasing the clip value removes lower-saturated colors from the Foreground image. Decreasing the clip value includes lower-saturated colors in the Foreground image.
    • Hue — select the central, or base, color for the foreground. Increasing the hue value moves counter-clockwise around the color wheel to select a base color. Decreasing the hue value moves clockwise around the color wheel to select a base color.
    • Reject — include or reject hues adjacent to the base color. Increasing the reject value decreases the amount of adjacent hues that are included in the foreground. Decreasing the reject value increases the amount of adjacent hues that are included in the foreground.
  12. Press Spill Suppress and use the Clip, Hue, and Reject knobs to adjust the amount of background color that is spilling over into the foreground (green color cast on the foreground from a green-screen for example)
    • Clip — adjust spill suppress clipping. Increasing the clip value removes higher-saturated colors from spill suppress correction. Decreasing the clip value includes higher-saturated colors in spill suppress correction. If your foreground image contains bright-colored areas that are suffering from background spill, decrease the clip value to have it corrected.
    • Hue — select the central, or base, color for spill suppress correction. If the color spill does not appear to be the same color as the background, use this control to adjust which hue is considered to be “spilled” into the foreground. Increasing the hue value moves counter-clockwise around the color wheel while selecting a base color. Decreasing the hue value moves clockwise around the color wheel while selecting a base color.
    • Reject — include or reject adjacent hues to the base. Increasing the reject value increases the amount of adjacent hues that are included in spill correction. Decreasing the reject value decreases the amount of adjacent hues that are included in spill correction.
  13. Press Edge Softness and use the Softness, Width, and Sensitivity knobs to adjust the edges of the foreground.
    Note: If the Width adjustment is set greater than Off, the Sensitivity is automatically set to Low. The Sensitivity is set back to what it was before when Width is set back to Off.
    Tip: The default Width and Sensitivity settings can be adjusted using the Edge Width Default setting on the Personality menu.
    • Softness — add or remove edge softening of the foreground image and alpha channel. Increasing the softness value increases the amount of softness applied to the foreground edges and alpha channel. Decreasing the softness value decreases the amount of softness applied to the foreground edges and alpha channel.
    • Width — adjust the outside edge of the foreground image and alpha channel. Increasing the width value increases the amount that the key encroaches onto the foreground image. Decreasing the width value decreases the amount that the key encroaches onto the foreground image.
    • Sensitivity — set the edge sensitivity.
      • Low — reduce the level of detail in the edges of the chroma key. This option will reduce the overall noise in the key image that can be the result of certain lighting conditions or high detail camera settings.
      • High — include the maximum detail in the edges of the chroma key.
  14. Press Luminance and use the Reflections and Bkgd Luma knobs to adjust the luminance, or brightness. The luminance settings allow you to adjust the overall brightness of the Shadow, Translucent, and Transition areas to change the appearance of reflections from semi-transparent objects and to match Shadow and Transition area brightness with the Foreground brightness.
    • Reflections — change the brightness of semi-transparent reflections (like reflections from glasses). Increasing the reflections value increases the brightness of semi-transparent reflections. Decreasing the reflections value decreases the brightness of semi-transparent reflections.
    • Bkgd Luma — change the overall brightness of Shadow, Translucent, and Transition areas. Increasing the background luminance value increases the brightness of Background, Translucent, and Transition areas. Decreasing the background luminance value decreases the brightness of Background, Translucent, and Transition areas.