HDTV灰度測試圖卡簡介

　　分辨率測試卡HDTV灰度測試圖卡用于攝像機的色調(diào)再現(xiàn)評估，兩個13度灰階條按相反的方向排列在灰色背景(D=0.75)中，灰階條以對數(shù)分等級。

　　分辨率測試卡一個最佳伽馬校正的攝像機的輸出信號產(chǎn)生兩個相反的13度線性步進信號?；译A的對比范圍是200:1。灰階密度：伽馬=0.45，透射值(亮度)：伽馬=2.2，剛好是伽馬=0.45的倒數(shù)值。

Introduction to HDTV grayscale test cards

Resolution The test card HDTV grayscale test card is used for the camera's hue reproduction evaluation. Two 13-degree grayscale bars are arranged in the opposite direction on a gray background (D = 0.75). The gray bars are numbered in logarithms.

?Resolution test card?HDTV grayscale test card reflection type
The resolution of the test card The output signal of an optimal gamma correction camera produces two opposite 13-degree linear step signals.Resolution test card The gray scale is 200: 1. Gray scale density: gamma = 0.45, transmission value (brightness): gamma = 2.2, just the gamma = 0.45 the inverse value.