Beijing Silk Road Enterprise Management Services Co., Ltd.
| Payment Terms | T/T,Paypal |
| Supply Ability | 1000pcs/month |
| Delivery Time | within 3-5 working days after payment confirmed |
| Packaging Details | Standard Export Package |
| Brand | SineImage |
| Usage | use a screening to form the gray levels |
| Light Source | Can be equiped with light box |
| Standard | ISO 14524 |
| Model | TE270X D |
| Value | Luminance and Density Data |
| Brand Name | SineImage |
| Model Number | COLOR CAMERA GRAY SCALE TEST CHART |
| Certification | CE&RoHS&TUV&FCC&ISO9001 |
| Place of Origin | China |
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Product Specification
| Payment Terms | T/T,Paypal | Supply Ability | 1000pcs/month |
| Delivery Time | within 3-5 working days after payment confirmed | Packaging Details | Standard Export Package |
| Brand | SineImage | Usage | use a screening to form the gray levels |
| Light Source | Can be equiped with light box | Standard | ISO 14524 |
| Model | TE270X D | Value | Luminance and Density Data |
| Brand Name | SineImage | Model Number | COLOR CAMERA GRAY SCALE TEST CHART |
| Certification | CE&RoHS&TUV&FCC&ISO9001 | Place of Origin | China |
| High Light | camera resolution chart ，camera lens test chart | ||
| Step |
Measured Density |
Reference Density |
Deviation |
| 1 | 0.03 | ||
| 2 | 0.10 | ||
| 3 | 0.17 | ||
| 4 | 0.24 | ||
| 5 | 0.32 | ||
| 6 | 0.41 | ||
| 7 | 0.50 | ||
| 8 | 0.59 | ||
| 9 | 0.70 | ||
| 10 | 0.81 | ||
| 11 | 0.94 | ||
| 12 | 1.08 | ||
| 13 | 1.23 | ||
| 14 | 1.41 | ||
| 15 | 1.61 | ||
| 16 | 1.85 | ||
| 17 | 2.15 | ||
| 18 | 2.53 | ||
| 19 | 3.08 | ||
| 20 | 4.03 | ||
| Background | 1.38 |
The specification of TE270X D is derived from ISO 14524.
Standard versions of OECF charts use a screening to form the gray levels. This may lead to increased noise levels or artefacts in the images of high resolution cameras that can resolve the screening but cannot defocused slightly (e. g. mobile phones). TE270X uses continuous tone film and therefore does not show these structures.
The center of the is equipped with two polarizing filters. For cameras that do not allow a manual adjustment of the exposure, the automatic exposure control (AEC) is fooled by modifying the density (transmission) of the central part of the chart. So the correct exposure of the chart can be reached. This feature is especially made for cameras and camera modules in mobile devices which often do not have a manual exposure adjustment.
OECF MEASUREMENT
The opto electronic conversion function (described in ISO 14524) is one of the most important characteristics of a digital camera. It describes how the camera transforms luminance values of an object or illuminance values on the sensor plane into digital code values in the digital image.
The OECF is typically measured from a gray scale. Depending on the type of camera different versions of test charts are used. It is a test chart with a circular arrangement of the gray levels. These may be affected by lens and camera related shading but since most optical systems are rotationally symmetric they will fall on the same shading level for all patches.
ISO 14524 describes how the densities to manufacture the chart are calculated. The
An integrating sphere like the LE6 or LE7 provides the best uniformity for the illumination of the OECF targets. Although the targets usually come with density levels and the integrating sphere has a build in illuminancemeter we recommend to use a luminance meter in combination with the charts because the conversion to luminances from densities and illuminances requires a calibration factor. A low cost but accurate device is the Gossen Mavo Monitor.
Note: Do not use a teleluminance meter for the measurements!!! These devices are affected by stray light and do not deliver accurate values for the dark patches!!!
The measured values for the patches can be used to create your specific reference file for the evaluation in the iQ-Analyzer. To type in the values use the “Luminance and Density Data” button in the advanced settings of the OECF module.
Images taken from a single gray scale target can be used to answer all of the following questions:
• What is the maximum contrast in a scene that can be captured by the camera in all its tonal details (dynamic range)?
• Is the white balancing o.k.?
• Does the camera use all possible digital values in the image?
• Is there a gamma or tonal correction applied to the captured linear image?
• What is the signal to noise ratio for different gray levels?
• What is the ISO speed of the camera?
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About Us:
Contact Information:
Contact Person: Clara Liu;
Email: L001@Silk.com;
Wechat & Whatsapp ID: +8613510310267;
Skype: clara.Silk
Company Details
Business Type:
Manufacturer
Year Established:
1998
Total Annual:
10000-50000
Employee Number:
100~200
Ecer Certification：
Active Member
The company is also the authorized agent of Philips and Sylvania. All products are widely used in plastic electronics, paint and ink, textile and dyeing, printing paper, food, medicine, cosmetics, scientific research, schools, laboratories, optical image testing ,and other fields. The company has ga... The company is also the authorized agent of Philips and Sylvania. All products are widely used in plastic electronics, paint and ink, textile and dyeing, printing paper, food, medicine, cosmetics, scientific research, schools, laboratories, optical image testing ,and other fields. The company has ga...
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