HDTV灰度測試圖卡簡介

　　解析度測試卡HDTV灰度測試圖卡用於攝像機的色調再現評估↟·☁，兩個13度灰階條按相反的方向排列在灰色背景(D=0.75)中↟·☁，灰階條以對數分等級↟↟✘。

　　解析度測試卡一個最佳伽馬校正的攝像機的輸出訊號產生兩個相反的13度線性步進訊號↟↟✘。灰階的對比範圍是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.