OECF 36 Chart (following ISO 14524/15739 and IEC 62676-5)
TE269 version 2 (V2) uses the same data measurements as the original version but has a different hardware design. The first version of the TE269 uses two plates of glass built around the chart film. On occasion, we encountered a few problems with stray light and reflections from the glass. Version 2 replaces the glass with a metal frame, which greatly reduces the chance of stray light and reflections.
When working with high dynamic range cameras, it is normal to use OECF charts with patch densities according to ISO 14524. However, many of these charts have large gaps between the high-density patches because they are calculated using the cube root formula.
Our 36 patch OECF TE269B V2 chart presents a solution to this problem. While these charts still closely follow IS0 14524, it also implements additional steps to address the higher density levels. High dynamic ranges up to 1.000.000:1 / 120 dB are attainable using these charts. In addition, they also benefit from having a stable production process and being strongly neutral.
Transparent test charts are best illuminated using a uniform illumination device such as the high-powered LG3 light box.
The iQ-Analyzer software can be used for obtaining more accurate results of OECF, dynamic range, SNR, noise, temporal noise, and visual noise.
- These transparent test charts are available in size D280
- The aspect ratio of the test pattern is 16:9 with integrated markers for 4:3 and 3:2 formats
- 36 patches with densities from 0.03 up to more than 6 (for 1.000.000:1 / 120 dB and higher)
- The standard version of TE269 V2 uses a screening to form the gray levels
The three variants available are:
Gray patches according to ISO 14524.
Better differentiation of the dark patches. The steps are based on the supporting points of the TE264 (20 patch chart) with a spreading of the steps in between.
This version has been adapted to the requirements of the standard IEC 62676-5: Video surveillance systems for use in security applications – Part 5: Data specifications and image quality performance for camera devices.
*For TE269C V2 we recommend using with a strong illumination device, e.g., LG3