Checkerboard Photographic Multi-Size Test Chart
The Checkerboard Photographic Multi-Size Test Chart is produced on high resolution photographic paper and is designed to work with the Checkerboard module. This module enhances testing of varying distances by supplying more testable regions to provide automated measurements of sharpness, lateral chromatic aberration, and distortion from images.
This chart is of particular interest for endoscope and medical device manufacturers, as the always-on, embedded light sources of these instruments often prevent the use of a high-resolution transmissive target.
Learn more about the Checkerboard Module.
Description
The Checkerboard Photographic Multi-Size Test Chart is compatible with both Visible Spectrum and Near Infrared sensors. This pattern is produced at a 4:1 contrast ratio on a Semi-Matte Photographic Media. For extremely high resolution systems, or systems where an onboard light source can be disabled, Chrome on Glass Checkerboard Targets are also available at sizes ≤ 4″ with 10:1 contrast ratio.
Learn more about the Checkerboard Module.
Paper Size and Active Area;
The paper size for this pattern is 9″ x 9″ and includes the following frequencies (square size) and Active Areas;
| Frequency | Active Area |
|---|---|
| 8mm | 96mm x 96mm (3.78″ x 3.78″) |
| 4mm | 100mm x100mm (3.94″ x 3.94″) |
| 2mm | 50mm x 50mm (1.97″ x 1.97″) |
| 1mm | 50mm x 50mm (1.97″ x 1.97″) |
| 0.5mm | 50mm x 50mm (1.97″ x 1.97″) |
Documentation and software support
Checkerboard can be run either through the highly-interactive Rescharts interface or as a batch-capable fixed module. The key documentation for getting started is Using Checkerboard Part 1, found in the Checkerboard section of the Documentation page. Checkerboard provides the most accurate distortion measurements.
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