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SMPTE EG 1-1990 Color Bars: Used for calibrating video monitor brightness, contrast, hue, and saturation. Adjust monitor contrast until top 75% bars are vibrant. Use the bottom PLUGE pulse to set true black level.
Generate standard SMPTE EG 1-1990 color bars with 75% intensity white, yellow, cyan, green, magenta, red, blue, plus PLUGE (-4%, 0%, +4%) pulses for precise monitor brightness and contrast calibration.
Verify display gamma curve, shadow detail recovery, and highlight clipping with continuous 256-step linear luminance ramps and 10-step discrete grayscale calibration blocks.
Align camera focus, projector geometry, aspect ratio distortion, and lens convergence with high-contrast grid lines, center crosshair, and framing circle guides.
Check color accuracy, camera white balance, and monitor colorimetry against standard 24-patch reference color patches based on real-world spectral reflectance values.
Optionally generate a 1000 Hz reference audio tone (-20 dBFS) or intermittent 1kHz audio bleep synced to a visual flash marker for audio-video sync latency testing.
Instantly download crystal-clear static PNG test cards up to 4K resolution, or export encoded MP4 video loops (5s, 10s, 15s) rendered 100% locally in your browser.
Frequently Asked Questions
SMPTE color bars are standard video test patterns used by television stations, video editors, and AV technicians to calibrate monitor brightness, contrast, hue, and chroma levels according to NTSC/ATSC broadcast standards.
PLUGE (Picture Line-Up Generation Equipment) consists of sub-black (-4%), true black (0%), and super-black (+4%) vertical bars at the bottom of SMPTE bars. It is used to calibrate monitor black level/brightness so sub-black blends into true black while super-black remains visible.
Yes! Enable the 1kHz Audio Tone option with Sync Pulse to output a periodic visual flash accompanied by a 1kHz audio bleep to measure lip-sync and audio delay.
No, all pattern rendering, audio synthesis, and MP4 encoding take place entirely inside your browser using HTML5 Canvas, Web Audio API, and MediaRecorder.
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