Test Card
テストパターン / 1934– / Style / Broadcast Design
The calibration image broadcast during setup and downtime. Color bars, grids, circles and skin-tone references answered an engineering necessity, yet they became a public geometry lodged in a generation's memory.
At a glance
Visual cues
- Color bars
- Concentric circles and grids
- A skin-tone reference image
- Waveform test patterns
Best used for
- Checking equipment or a display quickly by eye without instruments
- Standby screens that work as calibration and as decoration at once
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Dictionary entry
- Type
- Minimal monospaced lettering carrying only a name and a value
- Composition
- Circles placed to read distortion, grids placed to read linearity
- Material
- Primary bars and a neutral step wedge, no intermediate colors
- Caution
- Borrowing only the nostalgia and distorting the circles and grids until the image can no longer measure anything at all.
- Further study
- Test Card F and Carole Hersee / PM5544 and FuBK / the standards history of SMPTE bars
Related entries
- Blueprint (ブループリント)Shared effects: Technique.Compare Test Card and Blueprint
- Scanimate (スキャニメイト)Same Broadcast Design lineage.Compare Test Card and Scanimate
More from Broadcast Design
Continue through styles in the same Broadcast Design family, prioritised by shared effects.
Browse all Broadcast Design entries
Cite this entry
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- Link
- https://indexstyle.org/styles/test-card
- Markdown
- [Test Card — IndexStyle](https://indexstyle.org/styles/test-card)
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- <a href="https://indexstyle.org/styles/test-card">Test Card — IndexStyle</a>