解析度測試卡ISO12233增強型解析度測試卡₪│▩✘·，除了具有標準版的所有的特點外₪│▩✘·，解析度測試卡還加上了一些新特點,如✘╃：星狀圖₪│▩✘·，5°斜邊☁✘₪▩▩。
ISO12233解析度支援4000線☁✘₪▩▩。
ISO12233解析度卡尺寸
0.5X : 10cmX17.8cm
1X: 20cmX35.6cm
2X: 40X71.1cm
4X: 80X142.2cm
8X: 160X284.4cm
適用範圍
ISO12233標準適用於民用靜止照片數碼相機以下簡稱(DSC)₪│▩✘·，手機₪│▩✘·，監控攝像機等影象☁◕↟₪☁、影片採集裝置的清晰度分析☁✘₪▩▩。解析度測試卡在產品目錄等中記載靜止照片的解析度時₪│▩✘·，有些產品採用此標準規定的測量方法☁✘₪▩▩。
引用標準及檔案
在本標準中引用下列標準₪│▩✘·，它們將購成本標準規定的一部分☁✘₪▩▩。這些引用標準都適用其最新版本(含追加內容)☁✘₪▩▩。
ISO12233✘╃：2000 Photography-Electronic still-picture cameras - resolutionmeasurements
ISO7589✘╃：2002 Photography–Illuminants forsensitometry-Speccificationsfordaylight,incandescent tungsten and printer
術語及定義
a) 解析度resolution
除鋸齒外₪│▩✘·，可分辨精細圖案的極限☁✘₪▩▩。以畫面每單位高度的條數來表示☁✘₪▩▩。
b) 鋸齒aliasing
解析度測試卡取樣頻率小於影象訊號最高頻率的2倍時₪│▩✘·，在取樣頻率的高次諧波附近會產生帶波重疊的噪音☁✘₪▩▩。
測試圖表
1. ISO12233解析度測試卡
本標準以12233為基礎,測試圖表也直接利用ISO12233用圖表☁✘₪▩▩。ISO圖表中包含各種樣式₪│▩✘·，本標準(視覺解析度)主要使用其中的水平方向J1☁◕↟₪☁、K1；垂直方向的J2☁◕↟₪☁、K2；傾斜45度方向的JD☁◕↟₪☁、KD等樣式☁✘₪▩▩。
使用ISO圖表時₪│▩✘·，不一定直接使用該圖表☁✘₪▩▩。也可以剪出必須的部分₪│▩✘·，並經過重新拼接排列後使用☁✘₪▩▩。
2. ISO圖表中所記載數字的含義
解析度測試卡攝影時讓圖表的有效高度正好佔滿畫面,圖案的數字*100即為畫面中每單位高度的條數.拍攝時不一定要讓有效高度佔滿整個畫面,但此時需要進行標定.
3. ISO圖表以外的圖表
也可自己製作並使用與ISO圖表相同的圖表☁✘₪▩▩。此時必須滿足ISO12233中規定的如下事項☁✘₪▩▩。
a) 白底部分的反射率Rmax與大面積黑色部分的反射率Rmin之比為80>Rmax>Rmin>40☁✘₪▩▩。
b) 各個圖案的位置精度相對所規定位置為0.2mm(畫面高度的+-0.1%)☁✘₪▩▩。
c) 線寬為+-5%☁✘₪▩▩。
d) 雙曲線圖案K1☁◕↟₪☁、K2的最細部分(的白色部分和黑色部分)的反射率比Rmax/Rmin為18以上☁✘₪▩▩。但這僅為“推薦”水平(ISO12233的AnnexB)☁✘₪▩▩。
也可使用透射型圖卡☁✘₪▩▩。此時上述專案的反射率應解釋成透過率☁✘₪▩▩。使用透過型圖卡時₪│▩✘·，用擴散光進行照明☁✘₪▩▩。解析度測試卡無論是反射型還是透射型₪│▩✘·，評估用圖卡必須呈中性分光特性☁✘₪▩▩。
使用幫助
ISO12233增強型解析度測試卡包含了SFR測試☁◕↟₪☁、MTF測試（頻率線測試）☁◕↟₪☁、TVLine測試（楔形線測試）三種測量方式
SFR測試必須用軟體測試₪│▩✘·，頻率線測試用肉眼觀察即可₪│▩✘·，這裡主要說明一下楔形線測試☁✘₪▩▩。
楔形線測試的優點✘╃：
1. 非常直觀₪│▩✘·，用肉眼就可以觀察；
2. 對測試要求相對SFR較低；
3. 資料覆蓋面大₪│▩✘·，比頻率線測試精確；
4.可以用軟體輔助測試₪│▩✘·，得到更為精確的資料☁✘₪▩▩。
ISO12233解析度測試卡增強型原圖下載
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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