分辨率测试卡ISO12233增强型分辨率测试卡，除了具有标准版的所有的特点外，分辨率测试卡还加上了一些新特点,如：星状图，5°斜边。
ISO12233分辨率支持4000线。
ISO12233分辨率卡尺寸
0.5X : 10cmX17.8cm
1X: 20cmX35.6cm
2X: 40X71.1cm
4X: 80X142.2cm
8X: 160X284.4cm
适用范围
ISO12233标准适用于民用静止照片数码相机以下简称(DSC)，手机，监控摄像机等图像、视频采集设备的清晰度分析。分辨率测试卡在产品目录等中记载静止照片的分辨率时，有些产品采用此标准规定的测量方法。
引用标准及文件
在本标准中引用下列标准，它们将购成本标准规定的一部分。这些引用标准都适用其最新版本(含追加内容)。
ISO12233：2000 Photography-Electronic still-picture cameras - resolutionmeasurements
ISO7589：2002 Photography–Illuminants forsensitometry-Speccificationsfordaylight,incandescent tungsten and printer
术语及定义
a) 分辨率resolution
除锯齿外，可分辨精细图案的极限。以画面每单位高度的条数来表示。
b) 锯齿aliasing
分辨率测试卡采样频率小于图像信号最高频率的2倍时，在采样频率的高次谐波附近会产生带波重叠的噪音。
测试图表
1. ISO12233分辨率测试卡
本标准以12233为基础,测试图表也直接利用ISO12233用图表。ISO图表中包含各种样式，本标准(视觉分辨率)主要使用其中的水平方向J1、K1；垂直方向的J2、K2；倾斜45度方向的JD、KD等样式。
使用ISO图表时，不一定直接使用该图表。也可以剪出必须的部分，并经过重新拼接排列后使用。
2. ISO图表中所记载数字的含义
分辨率测试卡摄影时让图表的有效高度正好占满画面,图案的数字*100即为画面中每单位高度的条数.拍摄时不一定要让有效高度占满整个画面,但此时需要进行标定.
3. ISO图表以外的图表
也可自己制作并使用与ISO图表相同的图表。此时必须满足ISO12233中规定的如下事项。
a) 白底部分的反射率Rmax与大面积黑色部分的反射率Rmin之比为80>Rmax>Rmin>40。
b) 各个图案的位置精度相对所规定位置为0.2mm(画面高度的+-0.1%)。
c) 线宽为+-5%。
d) 双曲线图案K1、K2的最细部分(的白色部分和黑色部分)的反射率比Rmax/Rmin为18以上。但这仅为“推荐”水平(ISO12233的AnnexB)。
也可使用透射型图卡。此时上述项目的反射率应解释成透过率。使用透过型图卡时，用扩散光进行照明。分辨率测试卡无论是反射型还是透射型，评估用图卡必须呈中性分光特性。
使用帮助
ISO12233增强型分辨率测试卡包含了SFR测试、MTF测试（频率线测试）、TVLine测试（楔形线测试）三种测量方式
SFR测试必须用软件测试，频率线测试用肉眼观察即可，这里主要说明一下楔形线测试。
楔形线测试的优点：
1. 非常直观，用肉眼就可以观察；
2. 对测试要求相对SFR较低；
3. 数据覆盖面大，比频率线测试精确；
4.可以用软件辅助测试，得到更为精确的数据。
ISO12233分辨率测试卡增强型原图下载
ISO12233 enhanced resolution test card, in addition to the standard version of all the features, but also with some new features, such as: star map, 5 ° oblique edge.
ISO12233 resolution support 4000 lines.
ISO12233 resolution card size
0.5X: 10cmX17.8cm
1X: 20cmX35.6cm
2X: 40X71.1cm
4X: 80X142.2cm
8X: 160X284.4cm
The scope of application
ISO12233 standard for civilian still photo digital camera hereinafter referred to as (DSC), mobile phones, surveillance cameras and other images, video capture equipment, clarity analysis. When the resolution of a still picture is recorded in the product catalog or the like, some products use the measurement method specified in this standard.
Reference to standards and documents
The following standards are cited in this standard and they will be purchased as part of the applicable standard. These references are subject to the latest version (with additional content).
ISO12233: 2000 Photography-Electronic still-picture cameras - resolution measuresments
ISO7589: 2002 Photography-Illuminants forsensitometry-Speccificationsfordaylight, incandescent tungsten and printer
Terms and definitions
A) resolution resolution
In addition to sawtooth, can distinguish the limits of fine patterns. To the number of units per unit height to represent.
B) serrated aliasing
When the sampling frequency is less than twice the maximum frequency of the image signal, noise with overlapping waves is generated near the higher harmonics of the sampling frequency.
ISO12233 resolution test card 4000 line physical map
Test chart
1. ISO12233 resolution test card
This standard is based on 12233, the test chart is also directly used ISO12233 chart. ISO chart contains a variety of styles, the standard (visual resolution) mainly use the horizontal direction J1, K1; vertical direction of J2, K2; tilt 45 degrees JD, KD and other styles.
When using ISO charts, you do not have to use the chart directly. You can also cut out the necessary parts and use them after re-splicing.
2. The meaning of the numbers in the ISO chart
When shooting, the effective height of the chart is filled with the screen. The number of the pattern * 100 is the number of units per unit height of the screen.
Resolution test cardIt is not necessary to take the full height of the picture at the time of shooting, but the calibration is required.
3. Charts other than ISO charts
You can also make and use the same chart as the ISO chart. At this point must meet the requirements of ISO12233 the following matters.
A) The ratio of the reflectance Rmax of the white portion to the reflectance Rmin of the large area black portion is 80 & gt; Rmax & gt;
B) The positional accuracy of each pattern is 0.2 mm (+ -0.1% of the screen height) with respect to the predetermined position.
C) Line width is + -5%.
D) The reflectance ratio Rmax / Rmin of the finest portions (the white portion and the black portion) of the hyperbolic patterns K1, K2 is 18 or more. But this is only the "recommended" level (Annex12 of ISO12233).
A transmission type card can also be used. At this point the reflectance of the above items should be interpreted as transmittance. When using a through-type card, illuminate with diffused light. Whether it is reflective or transmissive, the evaluation card must be neutral spectral characteristics.
Using help
ISO12233 enhanced resolution test card contains the SFR test, MTF test (frequency line test), TVLine test (wedge line test) three measurement methods
SFR test must be tested with software, frequency line test can be observed with the naked eye,
Resolution test cardwhere the main description of the wedge line test.
Advantages of wedge test:
1. very intuitive, with the naked eye can be observed;
2. Lower test requirements relative to SFR;
3. Data coverage, accurate than the frequency line test;
4. You can use software-aided testing to get more accurate data.
ISO12233 resolution test card enhanced original download
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