With Carbonite, setup is quick and intuitive—choose your key color, initialize, dial in spill suppression, and fine-tune with advanced controls in seconds. Trusted by the biggest names in broadcast.

What UltraChrome Delivers

• Fast setup: select key color, initialize, and adjust spill suppression in seconds.
• Precision control: fine-tune edges, shadows, highlights, and translucency.
• Consistent results: professional quality keys across virtual studios, weather sets, and eSports broadcasts.

Chroma Key Modes

UltraChrome operates in two modes, selectable from the Personality menu as your preferred default:

Note: Switching modes applies each mode’s own image correction. Moving from Basic to Advanced may change the image as Advanced parameters engage at defaults.

Set Up a Chroma Key (Step-by-Step)

1. Select the chroma key output on a keyer so you can view results while adjusting parameters.
2. Click Navigation Menu > Live Assist > Chroma Key.
3. Click CK X for the chroma key engine you want to use.
4. Click CK Source and choose the video source (physical input, Media-Store, MediaWipe, or an Aux Bus with a valid source).
5. Click the Color button and select your background color (e.g., green or blue screen).
6. Click Init to automatically remove the selected background color. Further tweaks are optional.
7. Choose a Key Type:
   • HR Wedge Key — standard chroma keying based on color vector angle/level discrimination.
   • HR Detail Key — adds luminance dependency with a 3D spherical color discriminator.
   • HR Combination Key — blends Wedge + Detail for high-luma edge capture and compensation where foreground/background levels are similar.

All adjustments are available regardless of the selected mode; some may not be applied by a specific mode.

Wedge Key Parameters

• Gain — Set Angle to 100 and Lift to 0, then raise until the background is fully removed with a reasonable edge. Too much gain hardens edges.
• Bkgd Luma Suppress — Compensates for uneven color/lighting to fully suppress the background.
• Angle — Adjusts the wedge shape used to classify fill (foreground) vs alpha (background) along the chosen color vector. Helps address heavy spill without hard edges.
• Lift — Amplifies the generated alpha to fill areas of transparency.
• Highlight Correction — Lifts areas with high luminance at edges caused by lighting, camera setup, or subject.

Tips: Balance Gain with Bkgd Luma Suppress. Use a box mask on the keyer to compare backgrounds; masked areas show the source without key settings.

Detail Key Parameters

• Clip — Sets the threshold between foreground and background. Aim for complete background removal; too high reduces edge quality.
• Gain — Lifts the fill to achieve solid content; setting too high may introduce dark boundaries.
• Shadow Sensitivity — Adjusts dark image areas, especially cast shadows.
• Shadow Density — Tunes the apparent lightness of dark/shadow regions in concert with Shadow Sensitivity.
• Highlight Sensitivity — Fills areas with specular highlights (e.g., reflective surfaces) that may reveal background.

Global & Miscellaneous Parameters

• Chroma Angle — Selects the detected fill color considered spill. Typically no adjustment needed.
• Re-Spill — Use Re-Spill Color and Re-Spill Sat to add back a color near the average background/lighting to areas contaminated by spill.
• Edge Softness — Filters edges to avoid hard, unnatural borders and adds depth-of-field realism.
• Bkgd Norm Adjust — Offsets detected chroma background level for fine tuning.

Tip: Fine details (e.g., hair) with luminance close to the chroma background can be challenging—use the advanced controls to prioritize separation and edge quality.

Interested in Ross? Let’s build your next production setup together.

Call us at (512) 251-7778 or email sales@omegabroadcast.com.

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