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BuKe factory >> Questions >> 印刷使用的掃描儀的解析度分析

印刷使用的掃描儀的解析度分析

From:Buke printing factory of China | Author:China Bukeprinting factorybook0755 | Published time: 2020-10-12 | 371 Views | 🔊 Click to read aloud ❚❚ ▶ | Share:
​我們在通常的產品說明書上還可以看見掃描儀最大解析度的參數,掃描儀最大解析度是經過差值計算後得到的解析度,即在兩個光學採樣點之間通過不同的演算法得到一個或多個新的值,因此它並沒有真正增加圖像的細節,反而使掃描的圖像變得模糊,它不是掃描儀性能的真實反映。

印刷使用的掃描儀的解析度分析



我們在通常的產品說明書上還可以看見掃描儀最大解析度的參數,掃描儀最大解析度是經過差值計算後得到的解析度,即在兩個光學採樣點之間通過不同的演算法得到一個或多個新的值,因此它並沒有真正增加圖像的細節,反而使掃描的圖像變得模糊,它不是掃描儀性能的真實反映。


掃描黑白圖像或放大較小的圖像時,插值解析度十分有用。掃描黑白圖像時將解析度設為和輸出設備的解析度相等。例如,假設要將黑白圖像用1200dpi的輸出設備打印線條圖像,就用1200dpi的插值解析度以得到良好的圖像,產生平滑的線條,消除部分鋸齒影響。


放大較小的圖像,掃描儀最大光學解析度是600dpi的情況下,若希望將圖像放大4倍而不失其細節,則要使用1200dpi的插值分辨率。此時雖然打印出來的尺寸放大一倍,但圖像的細清晰度仍然相當好。

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印刷使用的掃描儀的解析度分析
印刷使用的掃描儀的解析度分析

 

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