Shenzhen ThreeNH Technology Co., Ltd.
Shenzhen ThreeNH Technology Co., Ltd. Leader Of Color Management In China
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CERTIFICATE OECF Chart YE0270X
The YE0270X chart is similar to the YE0264 but now has two polarizing filters in the center of the chart. This feature is important for cameras that do not allow a manual adjustment of the exposure because the automatic exposure control (AEC) is fooled by modifying the density (transmission) of the central part of the test chart. Low-end cameras and mobile phone camera systems often do not have a manual exposure adjustment.
The gray patches on the YE0270X chart are made from continuous tones and material without any raster. This design is necessary for cameras with a high pixel count that don’t have manual exposure adjustment.
YE0270X version 2 (V2) uses the same data measurements as the original version, but has a different hardware design. The first version of the YE0270X 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.
Specifications
| Product name | YE0270X |
| Principle | Transparent gray scale test chart with variable center density to determine the OECF,noise, SNR and dynamic range of cameras that only offer auto-exposure and autofocus functions (e. g. mobile devices) |
| Types of pattern | gray scale, circular arranged (most optical systems are rotationally symmetric so all patches will be affected in the same way by shading) |
| Contrast | 10,000:1 (80 dB, 13 f-stops) |
| Number of steps | 20 |
| Arrangement of steps | according to ISO 14524 |
| Values that can be gathered from analysis | •OECF / gamma curve • dynamic range • noise • temporal noise • visual noise • SNR • ISO speed of the camera |
| Type | transmissive |
| Aspect ratio | 16:9 (can be used for other aspect ratios without restrictions) |
| Chart size | 320*290mm |
| Picture size | 240*135mm |
| Material | photographic film |
| Standards | ISO 14524:2009 Methods for measuring opto-electronic conversion functions (OECFs) (YE0269A V2 only) ISO 15739:2013 Noise measurements ISO 12232:2006 Determination of exposure index, ISO speed ratings, standard output sensitivity, and recommended exposure index |
Suzie Xia
International Sales Dept.
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Shenzhen ThreeNH Technology Co., Ltd
Add: 4/F, Building 8, Nangang Second Industry Zone, Xili, Nanshan District, Shenzhen, 518055 China.
Tel: 0086-755-27198826 Ext: 601
Fax: 0086-755-27190609
Mobile/WhatsApp/Wechat: 0086-13510878132
Email: y@3nh.com
Skype: y@3nh.com
Website: http://www.3nhq.com/