分辨率测试卡对数频率反差测试卡简介

1、这张测试卡采用高品质半光泽纸喷墨打印。

2、纸张尺寸为24"×13"（610mmx330mm）

3、测试卡有效面积为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
 

分辨率测试卡Log Frequency Contrast Chart（对数频率反差测试卡）检测信号处理的效果——降低噪声和锐化——通过图像系统性能，在水平轴上区分空间频率（对数频率随x增大而增大）以及在垂直轴向上区分调制信号。调制信号与图像的高h关系为与（y/h）2成正比。因为Log F-Contrast 测试卡的结果是正弦曲线，其调制相当于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.