{"id":2401,"date":"2026-06-23T14:07:52","date_gmt":"2026-06-23T06:07:52","guid":{"rendered":"https:\/\/ci3d.ntust.edu.tw\/wpcourse\/?p=2401"},"modified":"2026-06-23T14:18:50","modified_gmt":"2026-06-23T06:18:50","slug":"potrace-%e9%bb%9e%e9%99%a3%e5%9c%96bmp%e8%bd%89%e6%8f%9b%e6%88%90%e5%90%91%e9%87%8f%e5%9c%96svg","status":"publish","type":"post","link":"https:\/\/ci3d.ntust.edu.tw\/wpcourse\/?p=2401","title":{"rendered":"Potrace \u9ede\u9663\u5716(bmp)\u8f49\u63db\u6210\u5411\u91cf\u5716(svg)"},"content":{"rendered":"

1. \u7c21\u4ecb (What is it?)<\/h2>\n

Potrace \u662f\u4e00\u500b\u5f37\u5927\u7684 \u9ede\u9663\u5716(bmp)\u8f49\u63db\u6210\u5411\u91cf\u5716(svg)\u00a0\u8f49\u63db\u5de5\u5177\u3002\u5b83\u5c07\u9ed1\u767d\u6216\u9ad8\u5c0d\u6bd4\u5ea6\u7684\u5716\u7247\uff08\u5982 PNG, GIF, BMP\uff09\u8f49\u5316\u70ba SVG \u683c\u5f0f\uff0c\u9069\u5408\u7528\u65bc\u7db2\u9801\u8a2d\u8a08\u3001Logo \u88fd\u4f5c\u6216\u5217\u5370\uff08\u7121\u9700\u8003\u616e\u89e3\u6790\u5ea6\u554f\u984c\uff09\u3002<\/p>\n

\u26a0\ufe0f\u00a0\u91cd\u8981\u9650\u5236<\/strong>\uff1aPotrace \u4e3b\u8981\u91dd\u5c0d\u00a0\u55ae\u8272\/\u9ed1\u767d\u8272\u8abf<\/strong>\u00a0\u5716\u50cf\u8655\u7406\u3002\u5982\u679c\u8f38\u5165\u5f69\u8272\u5716\u7247\uff0c\u5b83\u6703\u5c07\u5176\u5f37\u884c\u8f49\u70ba\u9ed1\u8272\u7dda\u689d\uff0c\u984f\u8272\u8cc7\u8a0a\u6703\u4e1f\u5931\u3002\u5efa\u8b70\u4f7f\u7528\u7c21\u5316\u7684 Logo\u3001\u5716\u6a19\u6216\u9ed1\u767d\u526a\u5f71\u3002<\/p>\n

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2. \u7cfb\u7d71\u5b89\u88dd\u8207\u74b0\u5883\u6e96\u5099<\/h2>\n

Potrace \u652f\u63f4 Linux (Debian\/Ubuntu) \u548c macOS\uff0cWindows \u4f7f\u7528\u8005\u901a\u5e38\u900f\u904e WSL (WSL2) \u6216 Cygwin \u904b\u884c\uff0c\u6216\u8005\u4f7f\u7528 Inkscape \u63d2\u4ef6\u3002<\/p>\n

\u5efa\u8b70\u76f4\u63a5\u4e0b\u8f09\u8edf\u9ad4\u4f86\u4f7f\u7528\u5373\u53ef\uff0c\u53c3\u8003\u4e0b\u65b9\u5716\u7247\u9078\u64c7\u4f60\u7684\u4f5c\u696d\u7cfb\u7d71 \u3002\u4e0b\u8f09\u7db2\u5740<\/a><\/p>\n

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\"\"<\/a><\/h2>\n

3. \u57fa\u672c\u6307\u4ee4\u8207\u7528\u6cd5<\/h2>\n

Potrace \u7684\u6838\u5fc3\u904b\u4f5c\u908f\u8f2f\u662f\u300c\u95b1\u8b80\u5716\u50cf -> \u8f49\u63db\u7b97\u6cd5 -> \u8f38\u51fa SVG\u300d\u3002<\/p>\n

\ud83d\udfe2 \u57fa\u790e\u8a9e\u6cd5<\/h3>\n
potrace <<\/span>\u8f38\u5165\u6a94\u540d><\/span> -s -o<\/span> <<\/span>\u8f38\u51fa\u6a94\u540d><\/span>\r\n<\/code><\/pre>\n
\ud83d\udd34 \u5e38\u7528\u53c3\u6578 (\u9078\u9805)<\/h3>\n\n\n\n\n\n\n\n\n\n
\u53c3\u6578<\/th>\n\u8aaa\u660e<\/th>\n<\/tr>\n<\/thead>\n
-i<\/code>,\u00a0--input<\/code><\/td>\n\u6307\u5b9a\u8f38\u5165\u5716\u7247\u6a94\u6848\u4f4d\u7f6e\u3002<\/td>\n<\/tr>\n
-o<\/code>,\u00a0--output<\/code><\/td>\n\u6307\u5b9a\u8f38\u51fa SVG \u6a94\u540d\uff08\u9810\u8a2d\u901a\u5e38\u6703\u547d\u540d\u70ba\u8207\u8f38\u5165\u6a94\u76f8\u540c\u6216 output.svg\uff09\u3002<\/td>\n<\/tr>\n
-q<\/code>,\u00a0--quality<\/code><\/td>\n\u8a2d\u5b9a\u7c21\u5316\u7a0b\u5ea6\uff0c\u7bc4\u570d\u662f\u00a00-1<\/strong>\u3002\u6578\u503c\u8d8a\u5927\u8d8a\u5e73\u6ed1\uff0c\u4f46\u7dda\u689d\u53ef\u80fd\u65b7\u88c2\uff1b\u6578\u503c\u8d8a\u5c0f\u8d8a\u8a73\u7d30\uff0c\u4f46\u53ef\u80fd\u96dc\u8a0a\u591a\u3002 (\u5efa\u8b70\u9810\u8a2d\u70ba 2)<\/td>\n<\/tr>\n
--alpha<\/code><\/td>\n\u8655\u7406\u900f\u660e\u80cc\u666f\uff08\u5c07\u900f\u660e\u8655\u8f49\u70ba\u767d\u8272\u6216\u9ed1\u8272\uff09\u3002<\/td>\n<\/tr>\n
--threshold<\/code><\/td>\n\u8a2d\u5b9a\u9ed1\u767d\u95be\u503c\uff080-1\uff09\uff0c\u63a7\u5236\u5c0d\u6bd4\u5ea6\u5f37\u5f31\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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4. \u7bc4\u4f8b<\/h2>\n
\u6b65\u9a5f\u4e00\uff1a\u6e96\u5099\u8f38\u5165\u5716\u7247 (Input)<\/h3>\n
\u60a8\u9700\u8981\u5148\u6709\u4e00\u5f35\u9069\u5408\u7684\u9ed1\u767d\u5716\u7247\u3002\u70ba\u4e86\u6e2c\u8a66\u6548\u679c\uff0c\u5efa\u8b70\u627e\u4e00\u500b\u7c21\u55ae\u7684 Logo\uff0c\u4e26\u4e14\u7528 8bit (Gray) \u5132\u5b58\uff0c\u63a8\u85a6XnView<\/a>\u770b\u5716\u8edf\u9ad4\u3002<\/p>\n
\u4e0b\u8f09\u7bc4\u4f8b\uff1aNTUST logo<\/a><\/p>\n
\"\"<\/a><\/p>\n
\u6b65\u9a5f\u4e8c\uff1a\u57f7\u884c\u8f49\u63db\u6307\u4ee4<\/h3>\n
\u6253\u958b\u7d42\u7aef\u6a5f\uff08Terminal\uff09\uff0c\u5c0e\u822a\u81f3\u5716\u7247\u76ee\u9304\uff0c\u8f38\u5165\u4ee5\u4e0b\u6307\u4ee4\uff1a<\/p>\n
\u7bc4\u4f8b 1\uff1a\u57fa\u790e\u8f49\u63db (\u9810\u8a2d\u8a2d\u5b9a)<\/strong><\/p>\n
.\/potrace ntust.bmp -s -o<\/span> ntust.svg\r\n<\/code><\/pre>\n
\u7bc4\u4f8b 2\uff1a\u8abf\u6574\u54c1\u8cea (Quality = 5\uff0c\u9069\u5408\u8907\u96dc\u5716\u6848)<\/strong><\/p>\n
.\/potrace ntust.bmp -s --quality<\/span> 5<\/span> -o <\/span>ntust.svg\r\n<\/code><\/pre>\n
\n
\n<\/blockquote>\n
\u6b65\u9a5f\u4e09\uff1a\u67e5\u770b\u7d50\u679c<\/h3>\n
\u4f7f\u7528\u700f\u89bd\u5668\u6216 SVG \u7de8\u8f2f\u5668\u6253\u958b\u751f\u6210\u7684\u6587\u4ef6\u3002<\/p>\n
 <\/p>\n
\nhttps:\/\/ci3d.ntust.edu.tw\/wpcourse\/wp-content\/uploads\/2026\/06\/potraceExample.mp4<\/a><\/video><\/div>\n
5. \u5e38\u898b\u554f\u984c\u8207\u512a\u5316\u53c3\u6578\u8abf\u6574<\/h2>\n
\u6709\u6642\u5019\u8f49\u63db\u5f8c\u7684 SVG \u6548\u679c\u4e0d\u597d\uff0c\u53ef\u80fd\u662f\u56e0\u70ba\u53c3\u6578\u8a2d\u5b9a\u4e0d\u9069\u5408\u8a72\u5716\u7247\u3002<\/p>\n
A. \u5716\u50cf\u904e\u9ed1\/\u904e\u767d\uff1f(\u4f7f\u7528 –threshold)<\/h3>\n
\u5982\u679c\u5716\u7247\u672c\u8eab\u6709\u7070\u8272\u96dc\u8a0a\uff0c\u9700\u8981\u63d0\u9ad8\u5c0d\u6bd4\u5ea6\u3002<\/p>\n
.\/potrace ntust.bmp --threshold<\/span> 0.8<\/span> -s -o<\/span> ntust.svg\r\n<\/code><\/pre>\n