解析度測試卡對數頻率反差測試卡簡介

1▩▩↟、這張測試卡採用高品質半光澤紙噴墨列印↟▩↟。

2▩▩↟、紙張尺寸為24"×13"（610mmx330mm）

3▩▩↟、測試卡有效面積為16.75"×13"（426x330mm）

The chart is printed with ink-jet process on high quality semi-gloss paper

The paper size is 24

The chart active area is 16.75
 

解析度測試卡Log Frequency Contrast Chart（對數頻率反差測試卡）檢測訊號處理的效果——降低噪聲和銳化——透過影象系統性能✘☁••，在水平軸上區分空間頻率（對數頻率隨x增大而增大）以及在垂直軸向上區分調製訊號↟▩↟。調製訊號與影象的高h關係為與（y/h）2成正比↟▩↟。因為Log F-Contrast 測試卡的結果是正弦曲線✘☁••，其調製相當於SFR或者MTF↟▩↟。

Resolution test card  Log Frequency Contrast Chart Detects the effect of signal processing - Reduces noise and sharpening - distinguishes the spatial frequency (logarithmic frequency increases with x) on the horizontal axis by image system performance, And distinguishing the modulation signal in the vertical axis. The high h relationship between the modulated signal and the image is proportional to (y / h) 2. Since the result of the Log F-Contrast test card is a sinusoidal curve, the modulation is equivalent to an SFR or MTF.