OECF 36 Chart (following ISO 14524/15739 and upcoming IEC 62676-5)
YE0269 version 2 (V2) uses the same data measurements as the
original version, but has a different hardware design. The first
version of the YE0269 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 YE0269B V2 chart presents a solution for 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.
Principle
Transparent gray scale test chart to determine the OECF, noise, SNR
and dynamic range especially of digital high dynamic range cameras.
Values that can be gathered from analysis
• OECF / gamma curve
• dynamic range
• noise
• temporal noise
• visual noise
• SNR
• ISO speed of the camera
Technical information
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 / 120dB and higher)
The standard version of YE0269 V2 uses a screening to form the gray
levels
The three variants available are:
YE0269A V2
Gray patches according to ISO 14524.
YE0269B V2
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.
YE0269C V2*
According to the upcoming standard IEC 62676-5: Video surveillance
systems for use in security applications – Part 5: Data
specifications and image quality performance for camera devices,
this chart is adapted to the postulated requirements.
*For YE0269C V2 we recommend using with a strong illumination
device, such as T25900. | Gray scale No. | YE0269A | YE0269B | YE0269C |
| Reference density | Reference density | Reference density |
| 1 | 0,03 | 0,03 | 0,03 |
| 2 | 0,07 | 0,06 | 0,13 |
| 3 | 0,11 | 0,10 | 0,23 |
| 4 | 0,15 | 0,14 | 0,33 |
| 5 | 0,19 | 0,17 | 0,53 |
| 6 | 0,23 | 0,25 | 0,73 |
| 7 | 0,27 | 0,33 | 0,93 |
| 8 | 0,32 | 0,42 | 1,13 |
| 9 | 0,36 | 0,52 | 1,33 |
| 10 | 0,41 | 0,62 | 1,53 |
| 11 | 0,46 | 0,73 | 1,73 |
| 12 | 0,52 | 0,85 | 1,93 |
| 13 | 0,57 | 0,99 | 2,13 |
| 14 | 0,63 | 1,14 | 2,33 |
| 15 | 0,69 | 1,31 | 2,53 |
| 16 | 0,75 | 1,50 | 2,73 |
| 17 | 0,82 | 1,68 | 2,93 |
| 18 | 0,88 | 1,83 | 3,13 |
