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- html {font:10pt Times;}
- h1, h2, h3 {margin:0; padding:0;}
- p {margin:0; padding:0; text-indent:2.5rem;}
- .formula {background:#80808080; text-align:center; padding:0.25rem;}
- .formula .bar {top:-0.15rem; position:relative; padding:0.1rem;}
- .formula .spc {bottom:-0.15rem; position:relative; padding:0.1rem;}
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- </style>
- <h1>Barcode: Interleaved 2 of 5</h1>
- <p class="formula sum"><b>ITF =</b> <span class=bar>n</span><span class=spc>n</span><span class=bar>n</span><span class=spc>n</span>
- [
- <span class=bar>b<sub>1</sub></span> <span class=spc>s<sub>1</sub></span>
- <span class=bar>b<sub>2</sub></span> <span class=spc>s<sub>2</sub></span>
- <span class=bar>b<sub>4</sub></span> <span class=spc>s<sub>4</sub></span>
- <span class=bar>b<sub>7</sub></span> <span class=spc>s<sub>7</sub></span>
- <span class=bar>b<sub>0</sub></span> <span class=spc>s<sub>0</sub></span>
- ]*
- <span class=bar>w</span><span class=spc>n</span><span class=bar>n</span></p>
- <h2>Opening</h2>
- <p>Opening adalah <span class=formula><span class=bar>n</span><span class=spc>n</span><span class=bar>n</span><span class=spc>n</span></span>,
- yang berarti bar-narrow lalu space-narrow lalu bar-narrow lalu space-narrow.
- Bar artinya garis hitam, space artinya garis putih.
- Narrow artinya garis tipis, dan wide artinya garis tebal (wide tebalnya dua atau tiga kali lipat narrow).
- <h2>Data</h2>
- <p>Data adalah berupa digit dan banyak digitnya harus genap (zero padding mungkin diperlukan) karena mereka akan dikelompokkan sepasang-sepasang.
- Digit di posisi index genap (digit ke-1, ke-3, ke-5, ke-7, dst) menjadi bar (bagian
- <span class=formula><span class=bar>b<sub>1</sub></span><span class=spc>?</span><span class=bar>b<sub>2</sub></span><span class=spc>?</span><span class=bar>b<sub>4</sub></span><span class=spc>?</span><span class=bar>b<sub>7</sub></span><span class=spc>?</span><span class=bar>b<sub>0</sub></span><span class=spc>?</span></span>),
- sementara digit di posisi index ganjil (digit ke-2, ke-4, ke-6, ke-8, dst) menjadi space (bagian
- <span class=formula><span class=bar>?</span><span class=spc>s<sub>1</sub></span><span class=bar>?</span><span class=spc>s<sub>2</sub></span><span class=bar>?</span><span class=spc>s<sub>4</sub></span><span class=bar>?</span><span class=spc>s<sub>7</sub></span><span class=bar>?</span><span class=spc>s<sub>0</sub></span></span>).
- <p>Dari kelima buah bar (<span class=formula>b<sub>1</sub> b<sub>2</sub> b<sub>4</sub> b<sub>7</sub> b<sub>0</sub></span>)
- maupun kelima buah space (<span class=formula>s<sub>1</sub> s<sub>2</sub> s<sub>4</sub> s<sub>7</sub> s<sub>0</sub></span>)
- dari setiap digit tersebut, agar lebih mudah kita sebut saja mereka <span class=formula>x<sub>1</sub> x<sub>2</sub> x<sub>4</sub> x<sub>7</sub> x<sub>0</sub></span>,
- dua buah di antaranya selalu adalah wide dan tiga buah adalah narrow, sebagai berikut.</p>
- <ul>
- <li>Digit 1 adalah <span class=formula>w n n n w</span> artinya <span class=formula>x<sub>1</sub></span> dan <span class=formula>x<sub>0</sub></span> wide, sisanya narrow. (1+0=1, check!)<br/>
- <li>Digit 2 adalah <span class=formula>n w n n w</span> artinya <span class=formula>x<sub>2</sub></span> dan <span class=formula>x<sub>0</sub></span> wide, sisanya narrow. (2+0=2, check!)<br/>
- <li>Digit 3 adalah <span class=formula>w w n n n</span> artinya <span class=formula>x<sub>1</sub></span> dan <span class=formula>x<sub>2</sub></span> wide, sisanya narrow. (1+2=3, check!)<br/>
- <li>Digit 4 adalah <span class=formula>n n w n w</span> artinya <span class=formula>x<sub>4</sub></span> dan <span class=formula>x<sub>0</sub></span> wide, sisanya narrow. (4+0=4, check!)<br/>
- <li>Digit 5 adalah <span class=formula>w n w n n</span> artinya <span class=formula>x<sub>1</sub></span> dan <span class=formula>x<sub>4</sub></span> wide, sisanya narrow. (1+4=5, check!)<br/>
- <li>Digit 6 adalah <span class=formula>n w w n n</span> artinya <span class=formula>x<sub>2</sub></span> dan <span class=formula>x<sub>4</sub></span> wide, sisanya narrow. (2+4=6, check!)<br/>
- <li>Digit 7 adalah <span class=formula>n n n w w</span> artinya <span class=formula>x<sub>7</sub></span> dan <span class=formula>x<sub>0</sub></span> wide, sisanya narrow. (7+0=7, check!)<br/>
- <li>Digit 8 adalah <span class=formula>w n n w n</span> artinya <span class=formula>x<sub>1</sub></span> dan <span class=formula>x<sub>7</sub></span> wide, sisanya narrow. (1+7=8, check!)<br/>
- <li>Digit 9 adalah <span class=formula>n w n w n</span> artinya <span class=formula>x<sub>2</sub></span> dan <span class=formula>x<sub>7</sub></span> wide, sisanya narrow. (2+7=9, check!)<br/>
- <li>Digit 0 adalah <span class=formula>n n w w n</span> artinya <span class=formula>x<sub>4</sub></span> dan <span class=formula>x<sub>7</sub></span> wide, sisanya narrow. (Hm, pokoknya 4+7=0).
- </ul>
- <h2>Closing</h2>
- <p>Closing adalah <span class=formula><span class=bar>w</span><span class=spc>n</span><span class=bar>n</span></span> artinya bar-wide lalu space-narrow lalu bar-narrow.
- <h2>Contoh</h2>
- <p>Misal datanya "2019". Komponen barcodenya adalah {opening} {digit 2 index genap (bar), digit 0 index ganjil (space)} {digit 1 index genap (bar), digit 9 index ganjil (space)} {closing}.</p>
- <ul>
- <li>{opening} = <span class=formula><span class=bar>n</span><span class=spc>n</span><span class=bar>n</span><span class=spc>n</span></span><br/>
- <li>{digit 2 index genap (bar), digit 0 index ganjil (space)}<br/>
- = <span class=formula><span class=bar>n</span><span class=spc>?</span><span class=bar>w</span><span class=spc>?</span><span class=bar>n</span><span class=spc>?</span><span class=bar>n</span><span class=spc>?</span><span class=bar>w</span><span class=spc>?</span></span>
- +
- <span class=formula><span class=bar>?</span><span class=spc>n</span><span class=bar>?</span><span class=spc>n</span><span class=bar>?</span><span class=spc>w</span><span class=bar>?</span><span class=spc>w</span><span class=bar>?</span><span class=spc>n</span></span>
- =
- <span class=formula><span class=bar>n</span><span class=spc>n</span><span class=bar>w</span><span class=spc>n</span><span class=bar>n</span><span class=spc>w</span><span class=bar>n</span><span class=spc>w</span><span class=bar>w</span><span class=spc>n</span></span><br/>
- <li>{digit 1 index genap (bar), digit 9 index ganjil (space)}<br/>
- = <span class=formula><span class=bar>w</span><span class=spc>?</span><span class=bar>n</span><span class=spc>?</span><span class=bar>n</span><span class=spc>?</span><span class=bar>n</span><span class=spc>?</span><span class=bar>w</span><span class=spc>?</span></span>
- +
- <span class=formula><span class=bar>?</span><span class=spc>n</span><span class=bar>?</span><span class=spc>w</span><span class=bar>?</span><span class=spc>n</span><span class=bar>?</span><span class=spc>w</span><span class=bar>?</span><span class=spc>n</span></span>
- =
- <span class=formula><span class=bar>w</span><span class=spc>n</span><span class=bar>n</span><span class=spc>w</span><span class=bar>n</span><span class=spc>n</span><span class=bar>n</span><span class=spc>w</span><span class=bar>w</span><span class=spc>n</span></span><br/>
- <li>{closing} = <span class=formula><span class=bar>w</span><span class=spc>n</span><span class=bar>n</span></span><br/>
- </ul>
- <p>Jadi barcodenya adalah <span class=formula><span class=bar>n</span><span class=spc>n</span><span class=bar>n</span><span class=spc>n</span><span class=bar>n</span><span class=spc>n</span><span class=bar>w</span><span class=spc>n</span><span class=bar>n</span><span class=spc>w</span><span class=bar>n</span><span class=spc>w</span><span class=bar>w</span><span class=spc>n</span><span class=bar>w</span><span class=spc>n</span><span class=bar>n</span><span class=spc>w</span><span class=bar>n</span><span class=spc>n</span><span class=bar>n</span><span class=spc>w</span><span class=bar>w</span><span class=spc>n</span><span class=bar>w</span><span class=spc>n</span><span class=bar>n</span></span>
- artinya bar-narrow lalu space-narrow lalu bar-narrow dst bar-wide lalu space-narrow lalu bar-narrow.<br/>
- <div class=box><span class=barn></span><span class=spcn></span><span class=barn></span><span class=spcn></span><span class=barn></span><span class=spcn></span><span class=barw></span><span class=spcn></span><span class=barn></span><span class=spcw></span><span class=barn></span><span class=spcw></span><span class=barw></span><span class=spcn></span><span class=barw></span><span class=spcn></span><span class=barn></span><span class=spcw></span><span class=barn></span><span class=spcn></span><span class=barn></span><span class=spcw></span><span class=barw></span><span class=spcn></span><span class=barw></span><span class=spcn></span><span class=barn></span></div>
- - Gung Sukma, 2020.
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