三恩时SkypeTM/Lync视频质量MTF检测测试卡

图像测试卡

SFRplus图：40"X60"，5×7，磨砂，双色

SFRplus图：24"X34"，5×7，磨砂，双色

圆点图案测试图表-中-大（15点高）

圆点图案测试图表-XLL（15点高）

爱色丽色卡经典图

高精度的8x10"胶片36补丁动态范围测试图

ISO-14524数码相机对比图ST-52-RM

溢出硬币（枯叶）测试图-中 -哑光3：1单

溢出硬币（枯叶）测试图-大哑光3：1单 

请注意，在2013年Skype的规范进行了修订。在这次修订的测试图的表面类型已从亚光/光泽改为磨砂，作为一项较少镜面反射的措施。

图卡是有黑色和白色组成的，其中一个聚焦星、20块级别卡以及包含10:1和2:1对比度。使用图卡太小会导致高分辨率传感器测量MTF摄像系统的图像MFT退化。

Please note that in 2013, the Skype Specification was revised. In this revision the surface type of the test charts has been changed from Semi-Gloss/Luster to Matte, as a measure to reduce specular reflection.
Charts are black and white, including a focus star, 20 patch step chart, and include 10:1 as well as 2:1 contrast ratios.
As shown on our blog, these charts are first mentioned in Version 5.0 of the Skype™ Hardware Certification Specification.
Skype™ is a registered trademark of Skype Limited.
Lighting Setup for ITDR-36
As written in the specification, "This chart needs an uniform light emitting surface below the chart, such as a dedicated light box." For this purpose we recommend the GL-16E Lightbox Viewer. This lightbox provides even illumination and features a high frequency ballast to eliminate flicker.
Ink Jet Chart Resolution

This chart, and all our ink jet printed charts have an approximate MTF50 of 5 cycles/mm.  Please keep this in mind when choosing the size of chart.  Using a chart that is too small with a high-resolution sensor can result in the MTF of the chart degrading the measured MTF of the camera system.

三恩时SkypeTM/Lync视频质量MTF检测测试卡