EIA GRAY SCALE

技術參數
Data: The EIA grayscale pattern is a standard 2" square projection slide. It 
contains two parallel gray scales. The upper scale has nine nominally equal 
transmission steps while the lower contains the same number of nominally equal 
density steps. The transmission values range from 3% to 60%, corresponding to 
density values of 1.52 and 0.22 respectively. The slide is chrome on glass and 
densities are achieved by a fine halftone pattern.

數據：環評灰度模式是一個標準的2”平方投影幻燈片。它包含兩個平行的灰度。上規模的有九個名義上的平等傳輸步驟，而較低的包含相同數量的名義上的平等

密度的步驟。傳輸值的范圍從3%到60%，相應的分別為1.52和0.22的密度值。滑動的玻璃和鉻密度是由細的半色調模式實現。