IMAG (Image Magnification)

Understanding IMAG

Image Magnification (IMAG) is the practice of capturing live video of performers, speakers, or action and displaying it on large screens throughout a venue. This allows audiences in large spaces to see facial expressions and details that would be invisible from their seats.

When IMAG is Necessary

**Viewing Distance Thresholds:**

• Under 50 feet: Direct viewing usually sufficient
• 50-100 feet: IMAG recommended
• 100+ feet: IMAG essential for engagement
• Stadium scale: Multiple IMAG screens required

IMAG Technical Requirements

**Camera Systems:**

• Broadcast cameras for primary positions
• PTZ (pan-tilt-zoom) for additional angles
• SDI connectivity (HD-SDI minimum, 3G-SDI preferred)
• Genlock capability for multi-camera switching

**Video Switching:**

• Production switcher for live cuts
• Multi-view monitors for director
• Recording capability for archival
• Graphics overlay system

**Signal Path to LED:**

• Switcher output → Processor → LED wall
• Maintain proper color space throughout
• Minimize latency (critical for sync with live audio)

IMAG Best Practices

**Camera Positioning:**

• Center camera for straight-on shots
• Side cameras for alternative angles
• Follow-spot positions for consistent lighting

**Framing Guidelines:**

• Headroom appropriate for motion
• Rule of thirds for composition
• Tighter shots for impact
• Wide shots for context

**LED Wall Considerations:**

• Brightness matched to venue lighting
• Color temperature consistent with stage
• Refresh rate suitable for camera capture
• Processing latency minimized

Common IMAG Challenges

**Audio Sync:** LED processing adds 1-2 frames of latency. For venues where audience sees both performer and screen, this delay is usually acceptable. For broadcast, frame-accurate sync is required.

**Lighting Conflicts:** Stage lighting designed for live audience may not suit cameras. IMAG-ready events add camera-friendly front light.

**Screen Placement:** Screens should not compete with live performers but should be visible to all seating sections.