{"id":1350,"date":"2012-01-17T23:37:45","date_gmt":"2012-01-17T15:37:45","guid":{"rendered":"http:\/\/www.fredkuo.idv.tw\/wordpress\/?p=1350"},"modified":"2012-01-18T00:21:54","modified_gmt":"2012-01-17T16:21:54","slug":"print-by-number-g7-%e5%b7%a5%e4%bd%9c%e9%87%8d%e9%bb%9e","status":"publish","type":"post","link":"https:\/\/fredkuo.idv.tw\/wordpress\/?p=1350","title":{"rendered":"Print by Number:: G7 \u5de5\u4f5c\u91cd\u9ede"},"content":{"rendered":"

<\/strong><\/p>\n

\u5169\u500b\u91cd\u9ede: \u7070\u8272\u5e73\u8861<\/span>\u8207\u8abf\u5b50(NPDC<\/span>)<\/span><\/strong><\/h2>\n

 <\/p>\n

1. Gray Balance: \u52d5\u614b\u5f0f\u7070\u8272\u5e73\u8861<\/span><\/span><\/strong><\/p>\n


\n<\/span><\/span>\u7070\u8272<\/strong>\u76ee\u6a19<\/strong>\u503c\u4f9d\u7d19\u5f35\u984f\u8272\u8b8a\u52d5
\nWanted a* = a*_paper * (100 – C%) \/ 100;
\nWanted b* = b*_paper * (100 – C%) \/ 100;<\/p>\n

\"image\"<\/a>
\n\u7406\u8ad6\u503c for\u00a0 a* = 2, b* = \u20135<\/strong><\/span><\/p>\n

<\/strong><\/a>\"image\"<\/a>
\n\u5be6\u969b\u6a23\u672c on a*=0, b*=-2<\/p>\n

<\/strong><\/p>\n

<\/p>\n

CMY \u7070\u8272\u7d44\u6210\u5b9a\u7fa9<\/strong><\/p>\n

C%<\/span> M%<\/span> Y%<\/span><\/strong> C%<\/span> M%<\/span> Y%<\/span><\/strong>
\n0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0
\n1.96\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1.38\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1.38\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 49.8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 39.82\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 39.89
\n<\/strong>3.92\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2.77\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2.77\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 54.9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 44.71\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 44.71
\n5.88\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 4.15\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 4.15\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 60\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 49.8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 49.8
\n7.84\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 5.61\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 5.61\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 65.1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 54.9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 54.9
\n10.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 7.41\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 7.41\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 69.8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 60.16\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 60.16
\n14.9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 11\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 11\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 74.9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 66.07\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 66.07
\n20\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 14.9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 14.9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 80\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 71.77\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 71.77
\n25.1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 18.8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 18.8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 85.1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 78.06\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 78.06
\n30.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 22.91\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 22.91\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 89.8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 84.61\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 84.61
\n34.9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 26.78\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 26.78\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 94.9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 92.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 92.2
\n40\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 30.98\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 30.98\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 98.04\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 96.86\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 96.86
\n45.1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 35.48\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 35.48\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 100\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 100\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 100<\/p>\n

G7 Gray Balance at 300% CMY : a*= 0, b*=0
\n<\/span><\/strong>\u8d85\u904e75%\u539f\u5247\u4e0aa*=0, b*=0<\/p>\n

2. NPDC (neutral Print Density Curves): 0%~25%\u7dad\u6301\u4e0d\u8b8a\uff0c25%\u4ee5\u5f8c\u52d5\u614b\u5f0f\u58d3\u7e2e<\/span><\/span><\/span><\/strong><\/p>\n

\"image\"<\/a><\/p>\n

\u4f9dISO\u6a19\u6e96\u72c0\u614b\uff0cCMY \u6fc3\u5ea6\u503c\u843d\u57281.37<\/strong><\/span>(\u4e0a\u5716), K \u6fc3\u5ea6\u503c\u843d\u57281.69<\/strong><\/span>(\u4e0b\u5716)\u3002The G7 NPDC Graph for a CMY gray scale. The bold black curve shows the nominal NPDC of ISO-standard commercial printing with a neutral density range of 1.37<\/span><\/strong>. Other curves are for higher or lower neutral density ranges.<\/p>\n

\"image\"<\/a>
\nThe G7 NPDC Graph for a black-only gray scale The bold black curve shows the nominal NPDC of ISO-standard commercial printing with a neutral density range of 1.69<\/strong><\/span>. Colored curves are for higher or lower neutral density ranges<\/p>\n

The G7 NPDC fitting function is designed to compress shadow detail before sacrificing highlight detail in a way that is most acceptable to most observers on most images. The compression effect moves progressively closer to the highlight as density range decreases, so that very dark shadow details are never completely lost.<\/p>\n

SiCoTVI Formula
\n<\/strong>For TV (dot%) = 0.0 \u2013 100.0;
\nSiCoY (cmy) = 100 – 95.7 * SiCoTV\/100;
\nSiCoY (k) = 100 – 98 * SiCoTV\/100;
\nSiCoTV = TV + SiCoTVI;
\nSiCoTVI (cmy) = (((1 – 1\/10^ SIN(TV\/100)) \/ 0.8559448 – TV\/100) * 2.744 – ((0.1- 1\/10^ COS(TV\/100)) \/ – 0.1882025 – TV\/100) * 0.594) * 25.2
\nSiCoTVI (k) = (((1 – 1\/10^ SIN(TV\/100)) \/ 0.8559448 – TV\/100) * 2.2295 – ((0.1- 1\/10^ COS(TV\/100)) \/ – 0.1882025 – TV\/100) * 1.0395) * 20.1<\/p>\n

\"image\"<\/a><\/p>\n\n\n<\/col>\n<\/col>\n<\/col>\n<\/col>\n<\/col>\n<\/col>\n<\/col>\n<\/col>\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
TV<\/span><\/td>\nNPDC ND<\/span><\/td>\nSiCoTVI (cmy)<\/span><\/td>\nSiCoY (cmy)<\/span><\/td>\nSiCoTV<\/span><\/td>\nNPDC ND<\/span><\/td>\nSiCoTVI (k)<\/span><\/td>\nSiCoY (k)<\/span><\/td>\nSiCoTV<\/span><\/td>\n<\/tr>\n
0<\/span><\/td>\n0.00 <\/span><\/td>\n0.00 <\/strong><\/span><\/td>\n100.00 <\/span><\/td>\n0.00 <\/span><\/td>\n0.00 <\/span><\/td>\n0.00 <\/strong><\/span><\/td>\n100.00 <\/span><\/td>\n0.00 <\/span><\/td>\n<\/tr>\n
5<\/span><\/td>\n0.05 <\/span><\/td>\n6.05 <\/strong><\/span><\/td>\n89.43 <\/span><\/td>\n11.05 <\/span><\/td>\n0.04 <\/span><\/td>\n4.46 <\/strong><\/span><\/td>\n90.73 <\/span><\/td>\n9.46 <\/span><\/td>\n<\/tr>\n
10<\/span><\/td>\n0.10 <\/span><\/td>\n11.08 <\/strong><\/span><\/td>\n79.83 <\/span><\/td>\n21.08 <\/span><\/td>\n0.09 <\/span><\/td>\n8.23 <\/strong><\/span><\/td>\n82.13 <\/span><\/td>\n18.23 <\/span><\/td>\n<\/tr>\n
15<\/span><\/td>\n0.15 <\/span><\/td>\n15.18 <\/strong><\/span><\/td>\n71.11 <\/span><\/td>\n30.18 <\/span><\/td>\n0.13 <\/span><\/td>\n11.36 <\/strong><\/span><\/td>\n74.16 <\/span><\/td>\n26.36 <\/span><\/td>\n<\/tr>\n
20<\/span><\/td>\n0.20 <\/span><\/td>\n18.45 <\/strong><\/span><\/td>\n63.21 <\/span><\/td>\n38.45 <\/span><\/td>\n0.18 <\/span><\/td>\n13.91 <\/strong><\/span><\/td>\n66.76 <\/span><\/td>\n33.91 <\/span><\/td>\n<\/tr>\n
25<\/span><\/td>\n0.25 <\/span><\/td>\n20.95 <\/strong><\/span><\/td>\n56.03 <\/span><\/td>\n45.95 <\/span><\/td>\n0.22 <\/span><\/td>\n15.93 <\/strong><\/span><\/td>\n59.89 <\/span><\/td>\n40.93 <\/span><\/td>\n<\/tr>\n
30<\/span><\/td>\n0.31 <\/span><\/td>\n22.76 <\/strong><\/span><\/td>\n49.51 <\/span><\/td>\n52.76 <\/span><\/td>\n0.27 <\/span><\/td>\n17.47 <\/strong><\/span><\/td>\n53.48 <\/span><\/td>\n47.47 <\/span><\/td>\n<\/tr>\n
35<\/span><\/td>\n0.36 <\/span><\/td>\n23.95 <\/strong><\/span><\/td>\n43.58 <\/span><\/td>\n58.95 <\/span><\/td>\n0.32 <\/span><\/td>\n18.55 <\/strong><\/span><\/td>\n47.52 <\/span><\/td>\n53.55 <\/span><\/td>\n<\/tr>\n
40<\/span><\/td>\n0.42 <\/span><\/td>\n24.57 <\/strong><\/span><\/td>\n38.20 <\/span><\/td>\n64.57 <\/span><\/td>\n0.38 <\/span><\/td>\n19.22 <\/strong><\/span><\/td>\n41.97 <\/span><\/td>\n59.22 <\/span><\/td>\n<\/tr>\n
45<\/span><\/td>\n0.48 <\/span><\/td>\n24.68 <\/strong><\/span><\/td>\n33.31 <\/span><\/td>\n69.68 <\/span><\/td>\n0.43 <\/span><\/td>\n19.50 <\/strong><\/span><\/td>\n36.79 <\/span><\/td>\n64.50 <\/span><\/td>\n<\/tr>\n
50<\/strong><\/span><\/td>\n0.54 <\/span><\/td>\n24.32<\/span> <\/strong><\/span><\/td>\n28.88 <\/span><\/td>\n74.32 <\/span><\/td>\n0.50 <\/span><\/td>\n19.42<\/span> <\/strong><\/span><\/td>\n31.97 <\/span><\/td>\n69.42 <\/span><\/td>\n<\/tr>\n
55<\/span><\/td>\n0.60 <\/span><\/td>\n23.52 <\/strong><\/span><\/td>\n24.85 <\/span><\/td>\n78.52 <\/span><\/td>\n0.56 <\/span><\/td>\n19.00 <\/strong><\/span><\/td>\n27.48 <\/span><\/td>\n74.00 <\/span><\/td>\n<\/tr>\n
60<\/span><\/td>\n0.67 <\/span><\/td>\n22.33 <\/strong><\/span><\/td>\n21.21 <\/span><\/td>\n82.33 <\/span><\/td>\n0.63 <\/span><\/td>\n18.24 <\/strong><\/span><\/td>\n23.32 <\/span><\/td>\n78.24 <\/span><\/td>\n<\/tr>\n
65<\/span><\/td>\n0.75 <\/span><\/td>\n20.75 <\/strong><\/span><\/td>\n17.94 <\/span><\/td>\n85.75 <\/span><\/td>\n0.71 <\/span><\/td>\n17.16 <\/strong><\/span><\/td>\n19.48 <\/span><\/td>\n82.16 <\/span><\/td>\n<\/tr>\n
70<\/span><\/td>\n0.82 <\/span><\/td>\n18.82 <\/strong><\/span><\/td>\n15.00 <\/span><\/td>\n88.82 <\/span><\/td>\n0.80 <\/span><\/td>\n15.76 <\/strong><\/span><\/td>\n15.96 <\/span><\/td>\n85.76 <\/span><\/td>\n<\/tr>\n
75<\/span><\/td>\n0.91 <\/span><\/td>\n16.54 <\/strong><\/span><\/td>\n12.40 <\/span><\/td>\n91.54 <\/span><\/td>\n0.89 <\/span><\/td>\n14.03 <\/strong><\/span><\/td>\n12.75 <\/span><\/td>\n89.03 <\/span><\/td>\n<\/tr>\n
80<\/span><\/td>\n0.99 <\/span><\/td>\n13.92 <\/strong><\/span><\/td>\n10.12 <\/span><\/td>\n93.92 <\/span><\/td>\n1.01 <\/span><\/td>\n11.96 <\/strong><\/span><\/td>\n9.87 <\/span><\/td>\n91.96 <\/span><\/td>\n<\/tr>\n
85<\/span><\/td>\n1.09 <\/span><\/td>\n10.96 <\/strong><\/span><\/td>\n8.16 <\/span><\/td>\n95.96 <\/span><\/td>\n1.13 <\/span><\/td>\n9.55 <\/strong><\/span><\/td>\n7.34 <\/span><\/td>\n94.55 <\/span><\/td>\n<\/tr>\n
90<\/span><\/td>\n1.18 <\/span><\/td>\n7.66 <\/strong><\/span><\/td>\n6.54 <\/span><\/td>\n97.66 <\/span><\/td>\n1.29 <\/span><\/td>\n6.77 <\/strong><\/span><\/td>\n5.16 <\/span><\/td>\n96.77 <\/span><\/td>\n<\/tr>\n
95<\/span><\/td>\n1.28 <\/span><\/td>\n4.02 <\/strong><\/span><\/td>\n5.24 <\/span><\/td>\n99.02 <\/span><\/td>\n1.47 <\/span><\/td>\n3.60 <\/strong><\/span><\/td>\n3.37 <\/span><\/td>\n98.60 <\/span><\/td>\n<\/tr>\n
100<\/span><\/td>\n1.37 <\/span><\/td>\n0.00 <\/strong><\/span><\/td>\n4.30 <\/span><\/td>\n100.00 <\/span><\/td>\n1.70 <\/span><\/td>\n0.00 <\/strong><\/span><\/td>\n2.00 <\/span><\/td>\n100.0 <\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u53c3\u8003\u9ede: TVI on 50%: <\/span>24.32(CMY)\uff0c19.42(K)
\n<\/span><\/strong>The \u2018Gray TVI\u2019 graphs produced by the Sin\/Cos formula, from which the master NPDC curves were
\nderived
\nNPDC ND = IF(SiCoY > 0, LOG10(100\/SiCoY), 1000)<\/p>\n

3. HR, SC and HC (\u5feb\u901f\u6aa2\u67e5\u9ede: \u4eae\u90e8\u5340\u57df\uff0c\u6697\u90e8\u53cd\u5dee\uff0c\u4eae\u90e8\u53cd\u5dee)<\/span><\/span><\/strong><\/p>\n

neutral density (ND) = Log10(100\/Y); (where Y > 0 < 100);<\/p>\n

\u4eae\u90e8\u5340\u57df \u76ee\u6a19\u503c: 0.54(CMY),\u00a0\u00a0 0.50(K) <\/strong><\/span>(for 1.3ND or higher)<\/span><\/strong>
\n<\/strong><\/span>\u6697\u90e8\u53cd\u5dee \u76ee\u6a19\u503c: 0.90(CMY),\u00a0\u00a0 0.90(K) <\/strong><\/span>(for commercial printing)<\/span><\/strong>
\n<\/strong><\/span>\u4eae\u90e8\u53cd\u5dee \u76ee\u6a19\u503c: 0.25(CMY),\u00a0\u00a0 0.22(K) (\u5e38\u6578\u72c0\u614b)
\n<\/span><\/strong><\/span>\"image\"<\/a>\"image\"<\/a>
\nNominal gray patch ND aim values (minus paper) for normal GRACoL ink densities
\nHR_cmy = ND(50c,40m,40y) – ND(paper) **0.54 <\/span><\/strong>(for 1.3ND or higher)
\n<\/span>HR_k = ND(50K) – ND(paper) **0.50 <\/span><\/strong>(for 1.3ND or higher)
\n<\/strong><\/span>
\n<\/span>SC_cmy = ND(75c,66m,66y) – ND(paper) <\/strong>**0.90 <\/span><\/strong>(for commercial printing)
\n<\/span><\/strong>SC_k = ND(75k) – ND(pape) **0.90 <\/span><\/strong>(for commercial printing)
\n<\/span><\/strong>
\nHC_cmy = ND(25c,19m,19y) – ND(paper)** constant of <\/span>0.25<\/span> (paper subtracted) for all printing processes.
\nHC_k = ND(25k) – ND(paper)** constant of <\/span>0.22<\/span> (paper subtracted) for all printing processes.
\n\"image\"<\/a>
\nGraph showing HR, SC, and HC aim values for devices with different dynamic ranges<\/p>\n

4. G7\u00ae Compliance (G7 \u968e\u6bb5\uff0c \u7dad\u6301G7\u4e00\u81f4\u6027)<\/span><\/span><\/strong><\/p>\n

4.1 G7 Grayscale (\u7070\u8272\u5e73\u8861\uff0cNPDC)
\n<\/strong>\u50c5\u505a \u7070\u5e73\u8861\u53caNPDC\uff0c\u4e0d\u505a\u7d19\u5f35\u53ca\u6cb9\u58a8\u9650\u5b9a\u3002<\/p>\n

4.2 G7 Targeted<\/span> (ISO 12647-2)
\n\u9650\u5b9a\u7d19\u5f35\u53ca\u6cb9\u58a8(\u5982 ISO 12647-2)\uff0c\u5176\u7d50\u679c\u61c9\u63a5\u8fd1 ISO 12647-2\uff0c\u4f46\u56e0 ink trapping, opacity, ink film variation, screening system \u7b49\u95dc\u4fc2\uff0c\u6578\u64da\u4e0d\u76e1\u8207ISO 12647-2 \u76f8\u7b26\u3002<\/strong><\/p>\n

4.3 G7 Characterized (SWOP, Gracol \u6253\u6a23)
\n<\/strong>\u7d93\u7531\u67d0\u7a2e\u63a7\u5236\u65b9\u5f0f(\u5982 icc profile)\u4f86\u7b26\u5408\u8207\u67d0\u5370\u5237\u898f\u683c(\u5982 SWOP, Gracol)\u7684\u8272\u5f69\u3002\u6578\u4f4d\u6253\u6a23\u5373\u5176\u61c9\u7528\u65b9\u5f0f \u7684 \u4e00\u7a2e\u3002<\/p>\n

4.4 G7 Extreme (\u958b\u653e\u8272\u57df\u7a7a\u9593)
\n<\/strong>\u7576\u5370\u5237\u8a2d\u5099\u6709\u66f4\u5927\u7684\u80fd\u529b(\u8f03\u5bec\u7684\u8272\u57df\u6216\u8f03\u9ad8\u7684\u6fc3\u5ea6\u7bc4\u570d\u5982\u5674\u58a8\u5370\u8868\u6a5f)\uff0c\u4e00\u6a23\u53ef\u7531G7\u8abf\u6821\u65b9\u5f0f\u9054\u6210 G7 Extreme \u968e\u6bb5\uff0c\u9019\u985e\u8a2d\u5099\u53ef\u7d93\u7531\u5176\u4ed6\u63a7\u5236\u65b9\u5f0f(\u5982icc profile)\u9054\u5230\u5176\u4ed6\u5370\u5237\u898f\u683c\u5982SWOP, Gracol\u7b49\u3002<\/p>\n

 <\/p>\n

Working procedure \u5de5\u4f5c\u6b65\u9a5f<\/strong><\/h2>\n

 <\/p>\n

1. \u8f38\u51fa P2P25X\u5c0e\u8868\u53caGyayFinder22\u5c0e\u8868<\/strong><\/p>\n

\"image\"<\/a>
\nP2P25X<\/p>\n

\"image\"<\/a>
\nGyayFinder 22<\/p>\n

\"image\"<\/a>
\n\u6e2c\u8a66\u6a23\u5f35(28\u201dx40\u201d)<\/p>\n

2. Plotting the Common CMY NPDC Curve (\u4f9dP2P25X\u91cf\u6e2c\u6578\u64da\u7e6a\u51faNPDC)<\/strong>
\n<\/strong>\"image\"<\/a> \"image\"<\/a><\/p>\n

Left: List of CMY ND values. Right: Marking the ND vs. dot % intersections with crosses.<\/p>\n

\"image\"<\/a><\/p>\n

3. Calculating RIP Values Without Gray Balance (\u5982\u7121\u9700\u505a\u7070\u8272\u8f03\u6b63\uff0c\u91cd\u62c9NPDC\u5373\u53ef)<\/strong><\/p>\n

\"image\"<\/a>\"image\"<\/a>\"image\"<\/a><\/p>\n

 <\/p>\n

4. Calculating RIP Values With Gray Balance(\u5982\u9700\u505a\u7070\u8272\u8f03\u6b63\uff0c\u4f9dGrayfinder22\u6578\u64da\uff0c\u91cd\u7e6aCMY NPDC \u66f2\u7dda)<\/strong><\/p>\n

Gray factor = (100 – C%) \/ 100;
\nWanted a* = a*_paper * Gray factor;
\nWanted b* = b*_paper * Gray factor;<\/p>\n

\"image\"<\/a> \"image\"<\/a><\/p>\n

\"image\"<\/a><\/p>\n

\"image\"<\/a><\/p>\n

\"image\"<\/a><\/p>\n

\"image\"<\/a> \"image\"<\/a><\/p>\n

4.1 \u56e0M\u5c0d\u7070\u8272\u8272\u76f8\u6709\u8f03\u5927\u5f71\u97ff\uff0cCMY\u6578\u64da\u9808\u76f8\u5c0dM\u503c\u505a\u4fee\u6b63\u3002
\n<\/strong>Adjusting for NPDC Error Due to Gray Balance<\/p>\n

ND_correction = (new_aim_C \u2013 new_aim_M) \/ 2;
\ncorrected aim_C = new aim_C + ND_correction;
\ncorrected aim_M = new aim_M + ND_correction;
\ncorrected aim_Y = new aim_Y + ND_correction;<\/p>\n

NEW AIMS ND_CORRECTION CORRECTED AIMS
\nC\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 M\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Y\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 M \u4fee\u6b63<\/strong><\/span> C\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 M\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Y
\n8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 7.5\u00a0\u00a0\u00a0\u00a0 (8 \u2013 9) \/ 2 = -0.5\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 7.5\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8.5\u00a0\u00a0\u00a0\u00a0\u00a0 7
\n21.5\u00a0\u00a0 23.5\u00a0\u00a0\u00a0 20\u00a0\u00a0\u00a0\u00a0 (21.5 \u2013 23.5) \/ 2 = -1\u00a0\u00a0\u00a0\u00a0 20.5\u00a0\u00a0\u00a0\u00a0 22.5\u00a0\u00a0\u00a0\u00a0 19
\n46\u00a0\u00a0\u00a0\u00a0\u00a0 49\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 43\u00a0\u00a0\u00a0 (46 \u2013 49) \/ 2 = -1.5\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 44.5\u00a0\u00a0\u00a0\u00a0 47.5\u00a0\u00a0\u00a0\u00a0 41.5
\n72\u00a0\u00a0\u00a0\u00a0\u00a0 74\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 69\u00a0\u00a0\u00a0 (72 \u2013 74) \/ 2 = -1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 71\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 73\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 68
\n90\u00a0\u00a0\u00a0\u00a0\u00a0 91\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 88\u00a0\u00a0\u00a0 (90 \u2013 91) \/ 2 = -0.5\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 89.5\u00a0\u00a0\u00a0\u00a0 90.5\u00a0\u00a0\u00a0\u00a0\u00a0 87.5<\/p>\n

 <\/p>\n

5. Calibration Using IDEAlink\u00ae Curve (Curve \u8edf\u9ad4\u4f7f\u7528)<\/strong><\/p>\n

Measuring the P2P Target in ColorPort
\nLoading Measurement File(s) in IDEAlink Curve
\nChoosing the Optimum Curve Points
\n\"image\"<\/a>
\nIDEAlink Curve\u2019s Output Curve display under the Create Curves tab (2,5,10 for hight detail)<\/p>\n

Determining if Gray Balance Needs Correcting
\n<\/strong> When the maximum difference between C, M and Y in any Output Curve Set row is equal to or
\ngreater than 1%, and the device consistently prints with the same gray balance error, different C,
\nM and Y RIP curves are recommended.<\/p>\n

\"image\"<\/a>
\nGray Balance switched ON in the Create Curves tab<\/p>\n

Paper White vs. Custom White
\n\"image\"<\/a><\/strong><\/p>\n

Reduce Gray Balance when Cyan > (\u2026)%
\n\"image\"<\/a> \"image\"<\/a>
\n<\/strong>A threshold of 90 (left) showing curve \u201cflats\u201d. 50 (right) is safer.<\/p>\n

Applying the Output Curve Set to the RIP<\/strong><\/p>\n

\"image\"<\/strong><\/a> <\/strong>\"image\"<\/strong><\/a>
\nGray Balance curves before (Left) and after (Right) successful G7 calibration<\/p>\n

A good G7 calibration should show no delta values greater than +\/-1.0% from substrate to 50%, and none greater than +\/- 2% above 50<\/strong><\/p>\n

Printing to Nominal Solid Ink Values<\/strong><\/p>\n

\"image\"<\/a><\/p>\n

 <\/p>\n

**\u6aa2\u9a57\u898f\u7bc4(G7 Target)<\/span><\/strong><\/p>\n

1. Grayscal \u8981\u6c42:
\n1.1 \u6e2c\u91cfP2P25 \u7b2c\u56db\u884c(K)\u53ca\u7b2c\u4e94\u884c(CMY) 23 steps
\n1.2 NPDC Average Weighted Delta L* =1.5\uff0cPeak Delta L*=3.0
\n1.3 \u7070\u5e73\u8861 (CMY only) Average Weighted Delta F*=1.5, Peak Delta F*=3.0<\/p>\n

2. CMYK follow ISO, RGB follow ISO\u3002<\/p>\n

3. \u5e73\u5747\u6027(uniformity):
\n3.1 \u5169\u500b P2P25\u9593\uff0c\u6700\u5927\u8272\u5dee<=3\u500b Delta-E(ab)
\n3.2 P2P25 \u8207 IT8.7\/4 \u9593\uff0c \u6700\u5927\u8272\u5dee<=6\u500b Delta-E(ab)<\/p>\n

4. ColorSpace \u8981\u6c42:
\n4.1 \u7d19\u5f35 <= 3 Delta-E
\n4.2 CMYK <= 5 Delta-E, hue difference<2.5
\n4.3 RGB < 6 Delta-E
\n4.4 IT8.7\/4 \u6240\u6709\u8272\u584a average<4 Delta-E, 95%\u4e4b\u8272\u584a < 6 Delta-E<\/p>\n","protected":false},"excerpt":{"rendered":"

\u5169\u500b\u91cd\u9ede: \u7070\u8272\u5e73\u8861\u8207\u8abf\u5b50(NPDC)   1. Gray Balance: \u52d5\u614b\u5f0f\u7070\u8272\u5e73\u8861 \u7070\u8272\u76ee […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[102,105,8,9,26],"class_list":["post-1350","post","type-post","status-publish","format-standard","hentry","category-4","tag-102","tag-g7","tag-iso-12647-2","tag-tvi","tag-26"],"_links":{"self":[{"href":"https:\/\/fredkuo.idv.tw\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1350"}],"collection":[{"href":"https:\/\/fredkuo.idv.tw\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fredkuo.idv.tw\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fredkuo.idv.tw\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fredkuo.idv.tw\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1350"}],"version-history":[{"count":3,"href":"https:\/\/fredkuo.idv.tw\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1350\/revisions"}],"predecessor-version":[{"id":1364,"href":"https:\/\/fredkuo.idv.tw\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1350\/revisions\/1364"}],"wp:attachment":[{"href":"https:\/\/fredkuo.idv.tw\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1350"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fredkuo.idv.tw\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1350"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fredkuo.idv.tw\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1350"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}