# Grids and Test Patterns

# Distortion and Siemens Star

#### Siemens Star

[![siemensstar.png](https://videng.wiki/uploads/images/gallery/2026-07/scaled-1680-/siemensstar.png)](https://videng.wiki/uploads/images/gallery/2026-07/siemensstar.png)

#### Distortion Grid

[![3. Distortion Grid.png](https://videng.wiki/uploads/images/gallery/2026-07/scaled-1680-/3-distortion-grid.png)](https://videng.wiki/uploads/images/gallery/2026-07/3-distortion-grid.png)

#### Distortion Checkerboard

[![3. Distortion Checkerboard.png](https://videng.wiki/uploads/images/gallery/2026-07/scaled-1680-/WVd3-distortion-checkerboard.png)](https://videng.wiki/uploads/images/gallery/2026-07/WVd3-distortion-checkerboard.png)

# BARS

SMPTE HD Bars (Note: bars should really be produced by a test pattern generator so the values are directly generated rather than from an image)

[![SMPTE_Color_Bars_16x9.svg.webp](https://videng.wiki/uploads/images/gallery/2026-07/scaled-1680-/smpte-color-bars-16x9-svg.webp)](https://videng.wiki/uploads/images/gallery/2026-07/smpte-color-bars-16x9-svg.webp)