杭州奥弦科技有限公司

摄像机测量一站式平台 专业的品质和优秀的技术团队 专业的标准化测试光源 工匠精神,精益求精!
产品搜索
在线客服
 工作时间
周一至周五 :9:00-17:00
 联系方式
韩先生:13395817847
联系方式

联系人:韩先生

电 话:13395817847

邮箱:sales@aoxiankj.com

     1768482490@qq.com

地 址:杭州市临丁路699号创业园1401-1403


产品详情
德国爱莎测试卡TE265
分享到:
德国爱莎测试卡TE265
编号: ESSER-TE-265
市场价: 0.0
产品详情

德国爱莎测试卡TE265 ,可更好的测量SFR指标,是目前最科学合理的SFR测试卡。


The TE265 Dead Leaves Target is used for the analysis of 'texture loss', which is the loss of low contrast,

fine details in images due to noise reduction or other image processing techniques.


The TE265 consists of four items:

• Background

All following items are placed on a neutral gray background with a gray level of 18%

• Registration marks

Four registration marks are placed on the test chart, one in each corner. These marks are used for

the automatic registration in analysis software, e.g. the Image Engineering iQ-Analyzer

• Gray patches

The chart contains 16 gray patches. The reflection of these patches is linear spaced between the

brightest patch and the darkest patch.

• Dead Leaves Pattern

The main item is the so called Dead Leaves pattern. This pattern consists of circles stacked on top

of each other with a known distribution of position, radius and gray level. The gray levels are limited

to a maximum contrast of 80% of the maximum achievable contrast.


Recommended usage:

We recommend to reproduce the chart with the device under test in that way, that the chart fills not more

than 1/3 of the image height.


In case this chart fills 1/3 of the image height it can be used for cameras with a sampling rate of up to 30

Megapixels.


The Dead Leaves pattern and its properties are described in this paper:

"Occlusion Models for Natural Images: A Statistical Study of a Scale-Invariant Dead Leaves Model"

by Ann Lee, David Mumford, and Jinggang Huang , International Journal of Computer Vision 41(1/2), 35-59,

2001

For the software based analysis of images, captured of the TE265, you can use the Image Engineering

iQ-Analyzer Version 5 and newer. This software will provide the Spatial Frequency Response (SFR)

measured on this target.