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BuKe factory >> Questions >> 印刷使用掃描儀質量差異主要表現在哪

印刷使用掃描儀質量差異主要表現在哪

From:Buke printing factory of China | Author:China Bukeprinting factorybook0755 | Published time: 2020-10-12 | 368 Views | 🔊 Click to read aloud ❚❚ ▶ | Share:
印刷使用掃描儀質量差異主要表現在哪

印刷使用掃描儀質量差異主要表現在哪

①圖像階調層次。

復制圖像的好壞關鍵是復制圖像階調層次再現,也就是圖像中從暗調到亮調深淺不同的變化程度。高檔掃描儀再現的階調層次一般比中低檔掃描儀的階調層次豐富,這取決於掃描儀顏色位數,位數轉換精度高,掃描儀可以捕獲的顏色細節就多,掃描圖像的層次就豐富,圖像就能清晰地再現。



②圖像色彩再現狀況。

即圖像有無偏色,灰平衡再現狀況。高檔掃描儀中性灰平衡再現要明顯好於中低檔掃描儀。



③圖像的亮度。

通過與原稿比較,觀察掃描圖像是否太暗或太亮,太暗或太亮都無法得到理想的圖像。



④動態範圍。

指的是原稿最暗點密度值與原稿最亮點密度值之間的差值,低端掃描儀的動態範圍普遍在3.0以下,高端掃描儀的動態範圍能達到3.4D左右或更高。

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印刷使用掃描儀質量差異主要表現在哪
印刷使用掃描儀質量差異主要表現在哪

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