(亞傑科技) 全新 三恩時 3nh 對數灰階測試圖反射型/透射型5階灰階測試圖卡客製chart圖示定板
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測試卡說明
兩個5級逆流灰度排列在灰色背景上（D≈0.83），灰階依正向對數分等級。相關的灰階密度：伽瑪=0.45。相關的緩解值（亮度）：伽瑪= 2.2，即恰好是伽瑪= 0.45的倒數值。
背景訊號在第四級和第四級灰階中間。利用兩個5級逆流線性步驟訊號產出最佳的相機伽瑪矯正值。灰階的對比範圍為40：1。
5級灰階值如下：
| 等級 | 密度 | 反射率 | 輸出電壓 |
| 1 | 0.15 | 71 | 100 |
| 2 | 0.37 | 43 | 77.5 |
| 3 | 0.65 | 22 | 55 |
| 4 | 1.05 | 9 | 32.5 |
| 5 | 1.75 | 2 | 10 |
這個密度值是基於BaSO4=0的密度。純黑色和純白色區域在灰階之間。純黑模組位於灰階之間。這塊的密度為D>2.4(反射率<0.5%)。
Two 5-graduated counter current gray scales are arranged on a gray background (D=0.83), the gray scales being graduated logarithmically. Related to the densities of the gray scales: gamma= 0arithmically. Related to the densities of the gray scales: gamma= 0.45. Related to the densities of the gray scales: gamma= 0.45. Related to the gir) value 0. being exactly the reciprocal value of gamma = 0.45.
The signal of the background is in the middle of the 3 rd and the 4 th step. The output of an optimally gamma-corrected camera yields two 5-graduated counter current linear step signals. The contrast wo 5-graduated counter current linear step signals. The contrast rangerange of the gray scales 1is.
The values of the 5-graduated gray scale are as follows:
| Step |
Density |
Reflectance in % |
Output voltage in % |
| 1 | 0.15 | 71 | 100 |
| 2 | 0.37 | 43 | 77.5 |
| 3 | 0.65 | 22 | 55 |
| 4 | 1.05 | 9 | 32.5 |
| 5 | 1.75 | 2 | 10 |
The density values are based on a density of BaO4S=0. A field of black velvet is located between the gray scales. The density of this field is D > 2.4 (reflectance < 0.5 %).
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