{"id":85925,"date":"2026-07-28T00:49:49","date_gmt":"2026-07-27T16:49:49","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/85925.html"},"modified":"2026-07-28T00:49:49","modified_gmt":"2026-07-27T16:49:49","slug":"s_y2printer-%e5%bc%80%e6%ba%90%e9%a1%b9%e7%9b%ae%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/85925.html","title":{"rendered":"s_y2printer \u5f00\u6e90\u9879\u76ee\u5206\u6790"},"content":{"rendered":"

s_y2printer \u5f00\u6e90\u9879\u76ee\u5206\u6790<\/h2>\n

\u4ed3\u5e93\u5730\u5740: https:\/\/gitee.com\/smallerxuan\/s_y2printer \u9879\u76ee\u5b9a\u4f4d: \u9762\u5411 \u5d4c\u5165\u5f0f\u70ed\u654f\u6253\u5370\u673a\u9879\u76ee\u7684\u534a\u8272\u8c03（Dithering）\u7b97\u6cd5\u5e93 \u6838\u5fc3\u529f\u80fd: \u5c06 8bit \u7070\u5ea6\u56fe\u50cf\u9ad8\u6548\u8f6c\u6362\u4e3a 1bit \u6253\u5370\u6570\u636e License: MIT<\/p>\n

\n

\u76ee\u5f55<\/h3>\n
  • \u9879\u76ee\u6982\u8ff0\u4e0e\u6838\u5fc3\u4ef7\u503c<\/li>\n
  • \u7cfb\u7edf\u67b6\u6784\u4e0e\u6a21\u5757\u5212\u5206<\/li>\n
  • \u534a\u8272\u8c03\u7b97\u6cd5\u539f\u7406\u4e0e\u5b9e\u73b0\u5bf9\u6bd4<\/li>\n
  • \u5d4c\u5165\u5f0f\u6df1\u5ea6\u4f18\u5316\u7b56\u7565<\/li>\n
  • \u516c\u5171\u57fa\u7840\u8bbe\u65bd\u89e3\u6790<\/li>\n
  • API \u8bbe\u8ba1\u4e0e\u7f16\u7a0b\u6a21\u578b<\/li>\n
  • \u865a\u62df\u6253\u5370\u673a\u9a8c\u8bc1\u4f53\u7cfb<\/li>\n
  • \u5de5\u7a0b\u89c4\u8303\u4e0e\u4ee3\u7801\u8d28\u91cf<\/li>\n
  • \u79fb\u690d\u6307\u5357\u4e0e\u96c6\u6210\u5efa\u8bae<\/li>\n
  • \u603b\u7ed3\u4e0e\u6280\u672f\u8bc4\u4ef7<\/li>\n
    \n

    1. \u9879\u76ee\u6982\u8ff0\u4e0e\u6838\u5fc3\u4ef7\u503c<\/h3>\n

    \u70ed\u654f\u6253\u5370\u5934\u7684\u7269\u7406\u7279\u6027\u51b3\u5b9a\u4e86\u6bcf\u4e2a\u52a0\u70ed\u70b9\u4ec5\u6709 \u201c\u52a0\u70ed \/ \u4e0d\u52a0\u70ed\u201d \u4e24\u79cd\u72b6\u6001（1bit）\u3002\u8981\u5728\u70ed\u654f\u7eb8\u4e0a\u5448\u73b0\u8fde\u7eed\u7684\u7070\u5ea6\u7167\u7247，\u5fc5\u987b\u4f9d\u8d56 \u534a\u8272\u8c03（Halftone） \u6280\u672f，\u901a\u8fc7\u63a7\u5236\u58a8\u70b9\/\u70ed\u70b9\u7684\u758f\u5bc6\u5206\u5e03\u6765\u6a21\u62df\u4eba\u773c\u611f\u77e5\u7684\u7070\u5ea6\u5c42\u6b21\u3002<\/p>\n

    s_y2printer \u5e76\u975e\u7b80\u5355\u7684\u7b97\u6cd5\u79fb\u690d，\u800c\u662f\u9488\u5bf9\u8d44\u6e90\u53d7\u9650\u7684\u5d4c\u5165\u5f0f MCU \u5e73\u53f0 \u8fdb\u884c\u4e86 \u5168\u94fe\u8def\u6df1\u5ea6\u4f18\u5316 \u7684\u5de5\u4e1a\u7ea7\u7b97\u6cd5\u5e93\u3002\u5176\u6838\u5fc3\u4ef7\u503c\u4f53\u73b0\u5728：<\/p>\n\n\u7ef4\u5ea6\u4f20\u7edf PC \u65b9\u6848s_y2printer \u5d4c\u5165\u5f0f\u65b9\u6848<\/tr>\n\n\n\n\n\n\n
    \u8fd0\u7b97\u7c7b\u578b<\/td>\n\u6d6e\u70b9\u8fd0\u7b97，\u7cbe\u5ea6\u9ad8\u4f46\u6d88\u8017\u5927<\/td>\n\u7eaf\u5b9a\u70b9\u6570\u8fd0\u7b97 ，\u5168\u7a0b\u65e0\u6d6e\u70b9，\u9664\u6cd5\u4f18\u5316\u4e3a\u4e58\u6cd5+\u79fb\u4f4d<\/td>\n<\/tr>\n
    \u5185\u5b58\u6a21\u578b<\/td>\n\u5168\u5e27\u7f13\u51b2（width \u00d7 height）<\/td>\n\u6d41\u5f0f\u884c\u5904\u7406 ，\u5185\u5b58\u5360\u7528\u4ec5\u4e0e\u56fe\u50cf\u5bbd\u5ea6\u76f8\u5173（\u9ad8\u5ea6\u65e0\u5173）<\/td>\n<\/tr>\n
    \u7070\u5ea6\u8868\u73b0<\/td>\n\u7eaf 1bit \u4e8c\u503c\u5316<\/td>\n\u591a\u7070\u5ea6\u5c42\u7ea7\u5957\u5370（Multi-level） ，\u5206\u89e3\u591a\u5c42\u591a\u6b21\u6253\u5370<\/td>\n<\/tr>\n
    \u626b\u63cf\u65b9\u5f0f<\/td>\n\u5355\u5411\u626b\u63cf，\u6613\u4ea7\u751f\u65b9\u5411\u6027\u7eb9\u7406<\/td>\n\u86c7\u5f62\u626b\u63cf（Serpentine） ，\u5947\u5076\u884c\u4ea4\u66ff\u65b9\u5411，\u6d88\u9664\u7eb9\u7406<\/td>\n<\/tr>\n
    \u56fe\u50cf\u589e\u5f3a<\/td>\n\u4f9d\u8d56\u5916\u90e8\u56fe\u50cf\u5904\u7406\u5e93<\/td>\n\u5185\u7f6e \u5bf9\u6bd4\u5ea6\u589e\u5f3a + \u4f3d\u9a6c\u6821\u6b63 ，\u9002\u914d\u4e0d\u540c\u7eb8\u5f20\u4e0e\u6d53\u5ea6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \n

    2. \u7cfb\u7edf\u67b6\u6784\u4e0e\u6a21\u5757\u5212\u5206<\/h3>\n

    \u9879\u76ee\u91c7\u7528\u5206\u5c42\u89e3\u8026\u7684\u67b6\u6784\u8bbe\u8ba1，\u7b97\u6cd5\u5185\u6838\u4e0e\u9a8c\u8bc1\u5de5\u5177\u5206\u79bb，\u786e\u4fdd\u5d4c\u5165\u5f0f\u7aef\u4ee3\u7801\u7684\u7eaf\u51c0\u6027\u3002<\/p>\n

    y2printer\/
    \n\u251c\u2500\u2500 src\/
    \n\u2502 \u251c\u2500\u2500 dither_process\/ # \u534a\u8272\u8c03\u7b97\u6cd5\u6838\u5fc3\u5e93
    \n\u2502 \u2502 \u251c\u2500\u2500 dither_common.{c,h} # \u516c\u5171\u57fa\u7840\u8bbe\u65bd（\u589e\u5f3a\/\u6620\u5c04\/\u4f4d\u6253\u5305）
    \n\u2502 \u2502 \u251c\u2500\u2500 fs_process\/ # Floyd-Steinberg \u7b97\u6cd5
    \n\u2502 \u2502 \u251c\u2500\u2500 atkinson_process\/ # Atkinson \u7b97\u6cd5
    \n\u2502 \u2502 \u251c\u2500\u2500 jjn_process\/ # Jarvis-Judice-Ninke \u7b97\u6cd5
    \n\u2502 \u2502 \u2514\u2500\u2500 stucki_process\/ # Stucki \u7b97\u6cd5
    \n\u2502 \u2514\u2500\u2500 virtual_printer\/ # PC \u7aef\u865a\u62df\u6253\u5370\u673a（BMP \u5408\u6210\u9a8c\u8bc1）
    \n\u251c\u2500\u2500 example\/ # PC \u7aef\u7f16\u8bd1\u6d4b\u8bd5\u793a\u4f8b（Makefile）
    \n\u251c\u2500\u2500 doc\/
    \n\u2502 \u251c\u2500\u2500 developer_docs\/ # \u4ee3\u7801\u89c4\u8303 \/ Git \u89c4\u8303（submodule）
    \n\u2502 \u2514\u2500\u2500 images\/ # \u6548\u679c\u5bf9\u6bd4\u56fe
    \n\u251c\u2500\u2500 LICENSE # MIT
    \n\u2514\u2500\u2500 README.md<\/p>\n

    2.1 \u67b6\u6784\u8bbe\u8ba1\u4eae\u70b9<\/h4>\n
      \n
    • \u7b97\u6cd5\u63d2\u4ef6\u5316: \u56db\u79cd\u7b97\u6cd5\u62e5\u6709\u5b8c\u5168\u4e00\u81f4\u7684\u63a5\u53e3\u8303\u5f0f（xxx_create \/ xxx_process_row \/ xxx_destroy），\u53ef\u5728\u7f16\u8bd1\u671f\u6216\u8fd0\u884c\u671f\u65e0\u7f1d\u5207\u6362\u3002<\/li>\n
    • \u96f6\u8026\u5408\u4f9d\u8d56: \u6838\u5fc3\u5e93\u4ec5\u4f9d\u8d56\u6807\u51c6 C \u5e93 stdint.h\u3001stdlib.h\u3001string.h，\u7b26\u5408 C11 \u6807\u51c6，\u65e0\u5e73\u53f0\u7ed1\u5b9a\u4ee3\u7801\u3002<\/li>\n
    • \u5806\u7b56\u7565\u53ef\u63a7: \u52a8\u6001\u5185\u5b58\u4ec5\u5728 *_create() \u4e2d\u4e00\u6b21\u6027\u5206\u914d，\u8fd0\u884c\u65f6\u5904\u7406\u8fc7\u7a0b\u96f6\u5206\u914d；\u5bf9\u4e8e\u65e0\u5806（heap-less）\u7684\u786c\u5b9e\u65f6\u7cfb\u7edf，\u53ef\u8f7b\u677e\u6539\u9020\u4e3a\u9759\u6001\u5b9e\u4f8b\u3002<\/li>\n<\/ul>\n
      \n

      3. \u534a\u8272\u8c03\u7b97\u6cd5\u539f\u7406\u4e0e\u5b9e\u73b0\u5bf9\u6bd4<\/h3>\n

      \u9879\u76ee\u5b9e\u73b0\u4e86\u56db\u79cd\u7ecf\u5178\u7684 \u8bef\u5dee\u6269\u6563（Error Diffusion） \u7b97\u6cd5\u3002\u5b83\u4eec\u5171\u4eab\u76f8\u540c\u7684\u6d41\u5f0f\u5904\u7406\u6846\u67b6，\u4f46\u5728\u6269\u6563\u6838\u3001\u7cfb\u6570\u5b9a\u70b9\u5316\u65b9\u5f0f\u3001\u5185\u5b58\u5360\u7528\u4e0a\u5b58\u5728\u5dee\u5f02\u3002<\/p>\n

      3.1 \u7b97\u6cd5\u6269\u6563\u6838\u5bf9\u6bd4<\/h4>\n\n\u7b97\u6cd5\u6269\u6563\u6838（X \u4e3a\u5f53\u524d\u50cf\u7d20）\u7cfb\u6570\u7279\u70b9\u89c6\u89c9\u6548\u679c<\/tr>\n\n\n\n\n\n
      Floyd-Steinberg<\/td>\nX 7\/16 3\/16 5\/16 1\/16<\/td>\n\u603b\u548c 16，\u5b8c\u7f8e\u5b9a\u70b9\u5316（>>4）<\/td>\n\u6700\u7ecf\u5178，\u7ec6\u8282\u9510\u5229，\u5bf9\u6bd4\u5ea6\u9ad8<\/td>\n<\/tr>\n
      Atkinson<\/td>\nX 1\/8 1\/8 1\/8 1\/8 1\/8 1\/8<\/td>\n6 \u4e2a\u4f4d\u7f6e\u5404 1\/8，\u4fdd\u7559 25% \u8bef\u5dee<\/td>\n\u67d4\u548c\u80f6\u7247\u611f，\u6697\u90e8\u7ec6\u8282\u4e30\u5bcc<\/td>\n<\/tr>\n
      JJN<\/td>\nX 7 5 3 5 7 5 3 1 3 5 3 1 (\u00f748)<\/td>\n\u603b\u548c 48，\u6269\u6563\u8303\u56f4\u5927（3\u884c\u00d75\u5217）<\/td>\n\u8fc7\u6e21\u6781\u5e73\u6ed1，\u9002\u5408\u4eba\u50cf<\/td>\n<\/tr>\n
      Stucki<\/td>\nX 8 4 2 4 8 4 2 1 2 4 2 1 (\u00f742)<\/td>\n\u603b\u548c 42，\u7c7b\u4f3c JJN \u4f46\u6743\u91cd\u66f4\u96c6\u4e2d<\/td>\n\u8fb9\u7f18\u66f4\u6e05\u6670，\u6587\u5b57\u8868\u73b0\u597d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      3.2 \u5b9a\u70b9\u6570\u5b9e\u73b0\u5dee\u5f02<\/h4>\n

      \u4e0d\u540c\u7b97\u6cd5\u7684\u9664\u6570\u51b3\u5b9a\u4e86\u5b9a\u70b9\u5316\u7b56\u7565\u7684\u4f18\u52a3，\u9879\u76ee\u9488\u5bf9\u6bcf\u79cd\u7b97\u6cd5\u505a\u4e86 \u5b9a\u5236\u5316\u9664\u6cd5\u4f18\u5316 ：<\/p>\n

        \n
      • Floyd-Steinberg : \u5206\u6bcd\u4e3a 16，\u76f4\u63a5\u7528\u7b97\u672f\u53f3\u79fb >> 4，\u96f6\u6210\u672c\u3002<\/li>\n
      • Atkinson : \u5206\u6bcd\u4e3a 8，\u7528 >> 3，\u4e14\u6240\u6709\u6269\u6563\u4f4d\u7f6e\u7cfb\u6570\u76f8\u540c，\u4ee3\u7801\u6781\u7b80\u3002<\/li>\n
      • JJN : \u5206\u6bcd\u4e3a 48，\u65e0\u6cd5\u88ab 2 \u7684\u5e42\u6574\u9664\u3002\u9879\u76ee\u91c7\u7528\u5b9a\u70b9\u4e58\u6cd5\u8fd1\u4f3c：\/\/ value \/ 48 \u2248 (value * 5461) >> 18<\/span>
        \n\/\/ 5461\/2^18 \u2248 1\/48, \u8bef\u5dee < 0.001%<\/span>
        \nstatic<\/span> inline<\/span> int32_t<\/span> prv_div_by_48<\/span>(<\/span>int32_t<\/span> value)<\/span> {<\/span>
        \n return<\/span> (<\/span>value *<\/span> 5461<\/span> +<\/span> (<\/span>1<\/span> <<<\/span> 17<\/span>)<\/span>)<\/span> >><\/span> 18<\/span>;<\/span>
        \n}<\/span>\n <\/li>\n
      • Stucki : \u5206\u6bcd\u4e3a 42，README \u63d0\u5230\u53ef\u7528\u4e58\u6cd5+\u79fb\u4f4d\u8fd1\u4f3c（39135 >> 22），\u6216\u5229\u7528\u90e8\u5206 MCU \u7684\u5feb\u901f\u786c\u4ef6\u9664\u6cd5\u3002<\/li>\n<\/ul>\n

        3.3 \u5185\u5b58\u5360\u7528\u5bf9\u6bd4（\u4ee5 384 \u50cf\u7d20\u5bbd\u4e3a\u4f8b）<\/h4>\n\n\u7b97\u6cd5\u8bef\u5dee\u7f13\u51b2\u5de5\u4f5c\u884c\u7f13\u51b2\u5408\u8ba1（\u7ea6）<\/tr>\n\n\n\n
        Floyd-Steinberg<\/td>\n2 \u884c \u00d7 386 \u00d7 4B<\/td>\n768 B<\/td>\n~3.8 KB<\/td>\n<\/tr>\n
        Atkinson \/ JJN \/ Stucki<\/td>\n3 \u884c \u00d7 388 \u00d7 4B<\/td>\n768 B<\/td>\n~5.4 KB<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        \u5173\u952e\u8bbe\u8ba1: \u8bef\u5dee\u7f13\u51b2\u4f7f\u7528 int32_t \u800c\u975e int16_t，\u867d\u7136\u589e\u52a0\u5c11\u91cf\u5185\u5b58，\u4f46\u5f7b\u5e95\u907f\u514d\u4e86\u957f\u65f6\u95f4\u7d2f\u79ef\u540e\u7684\u8bef\u5dee\u6ea2\u51fa\u622a\u65ad，\u4fdd\u7559\u4e86\u66f4\u591a\u6697\u90e8\u7ec6\u8282\u3002<\/p>\n

        3.4 \u6e10\u53d8\u6548\u679c\u5bf9\u6bd4<\/h4>\n

        \u4e0b\u56fe\u662f 384\u00d7240 \u6e10\u53d8\u6d4b\u8bd5\u56fe\u7ecf 16 \u5c42\u7ea7\u5957\u5370\u540e，\u56db\u79cd\u7b97\u6cd5\u5728\u540c\u4e00\u8f93\u5165\u4e0a\u7684\u89c6\u89c9\u5dee\u5f02\u3002\u53ef\u76f4\u89c2\u770b\u5230 Floyd-Steinberg \u7ec6\u8282\u9510\u5229\u3001Atkinson \u67d4\u548c\u3001JJN \/ Stucki \u8fc7\u6e21\u5e73\u6ed1\u7684\u7279\u70b9\u3002<\/p>\n

        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

        \n

        4. \u5d4c\u5165\u5f0f\u6df1\u5ea6\u4f18\u5316\u7b56\u7565<\/h3>\n

        4.1 \u6d41\u5f0f\u884c\u5904\u7406（Streaming Row Processing）<\/h4>\n

        \u4f20\u7edf\u56fe\u50cf\u5904\u7406\u9700\u5b8c\u6574\u52a0\u8f7d\u56fe\u50cf\u5e27（\u5982 384\u00d7240 \u7ea6 90KB），\u5bf9 RAM \u4ec5 20~64KB \u7684 MCU \u4e0d\u53ef\u63a5\u53d7\u3002s_y2printer \u91c7\u7528 \u6d41\u5f0f\u67b6\u6784 ：<\/p>\n

          \n
        • \u4ec5\u9700 2~3 \u884c\u8bef\u5dee\u7f13\u51b2 + 1 \u884c\u5de5\u4f5c\u7f13\u51b2（work_row）\u3002<\/li>\n
        • \u5904\u7406\u8fc7\u7a0b\u4e3a\u7eaf\u9010\u884c\u72b6\u6001\u673a：\u8f93\u5165\u4e00\u884c Y \u6570\u636e \u2192 \u8bef\u5dee\u6269\u6563 \u2192 \u8f93\u51fa 1bit \u6253\u5305\u6570\u636e\u3002<\/li>\n
        • \u53ef\u76f4\u63a5\u5bf9\u63a5 JPEG \u89e3\u7801\u5668\u9010\u884c\u8f93\u51fa\u6216\u6444\u50cf\u5934 DMA \u884c\u7f13\u51b2，\u5b9e\u73b0"\u8fb9\u89e3\u7801\u3001\u8fb9\u6296\u52a8\u3001\u8fb9\u6253\u5370"\u7684\u6d41\u6c34\u7ebf\u3002<\/li>\n<\/ul>\n

          4.2 \u86c7\u5f62\u626b\u63cf（Serpentine Scanning）<\/h4>\n

          \u6807\u51c6\u8bef\u5dee\u6269\u6563\u4ece\u5de6\u5230\u53f3\u5355\u5411\u626b\u63cf\u65f6，\u8bef\u5dee\u603b\u662f\u5411\u53f3\u4e0b\u65b9\u4f20\u9012，\u4f1a\u4ea7\u751f\u660e\u663e\u7684\u65b9\u5411\u6027\u7eb9\u7406（\u5982\u53f3\u4e0b\u503e\u659c\u7684"\u98ce\u75d5"）\u3002<\/p>\n

          s_y2printer \u652f\u6301 reverse \u53c2\u6570：<\/p>\n

            \n
          • \u5076\u6570\u884c：\u4ece\u5de6\u5230\u53f3\u5904\u7406\u3002<\/li>\n
          • \u5947\u6570\u884c：\u4ece\u53f3\u5230\u5de6\u5904\u7406，\u6269\u6563\u6838\u505a \u5de6\u53f3\u955c\u50cf \u3002<\/li>\n<\/ul>\n

            \u5185\u90e8\u6253\u5305\u65f6\u6309\u53cd\u5411\u4f4d\u5e8f\u5199\u5165，\u5904\u7406\u5b8c\u6bd5\u540e\u8c03\u7528 dither_reverse_output_buffer() \u5c06\u4f4d\u5e8f\u6062\u590d\u4e3a\u6807\u51c6\u4ece\u5de6\u5230\u53f3\u7684\u4f4d\u56fe\u987a\u5e8f，\u786e\u4fdd\u6253\u5370\u673a\u786c\u4ef6\u65e0\u9700\u611f\u77e5\u626b\u63cf\u65b9\u5411\u3002<\/p>\n

            4.3 \u591a\u7070\u5ea6\u5c42\u7ea7\u5957\u5370（Multi-level Dithering）<\/h4>\n

            \u70ed\u654f\u7eb8\u7684 1bit \u4e8c\u503c\u5316\u7070\u5ea6\u8868\u73b0\u6709\u9650\u3002\u9879\u76ee\u652f\u6301\u5c06\u540c\u4e00\u56fe\u50cf\u5206\u89e3\u4e3a level_count \u4e2a\u5c42\u7ea7，\u5bf9\u6bcf\u4e2a\u5c42\u7ea7\u5206\u522b\u505a\u6296\u52a8\u540e \u591a\u6b21\u5957\u5370 ：<\/p>\n

            cfg.<\/span>level_count =<\/span> 16<\/span>;<\/span> \/\/ \u5206 16 \u5c42<\/span>
            \ncfg.<\/span>level_index =<\/span> 0<\/span>;<\/span> \/\/ \u5f53\u524d\u5904\u7406\u7b2c 0 \u5c42<\/span><\/p>\n

              \n
            • \u6bcf\u5c42\u901a\u8fc7 dither_map_to_level() \u5c06 0~255 \u6620\u5c04\u5230\u8be5\u5c42\u7ea7\u7684\u6709\u6548\u7070\u5ea6\u533a\u95f4\u3002<\/li>\n
            • \u5c42\u7ea7\u8d8a\u9ad8，\u6253\u5370\u7684\u70b9\u8d8a\u5bc6\u96c6，\u53e0\u52a0\u540e\u53ef\u5728\u70ed\u654f\u7eb8\u4e0a\u83b7\u5f97\u8fdc\u8d85 1bit \u7684\u7070\u5ea6\u5c42\u6b21\u3002<\/li>\n
            • \u865a\u62df\u6253\u5370\u673a\u6a21\u5757\u53ef\u5c06\u591a\u5c42 1bit \u8f93\u51fa\u5408\u6210\u4e3a\u5355\u5f20 BMP \u9a8c\u8bc1\u6548\u679c\u3002<\/li>\n<\/ul>\n

              4.4 \u56fe\u50cf\u589e\u5f3a\u524d\u7f6e\u5904\u7406<\/h4>\n

              \u5728\u8bef\u5dee\u6269\u6563\u524d，\u63d0\u4f9b\u4e24\u79cd\u5d4c\u5165\u5f0f\u53cb\u597d\u7684\u56fe\u50cf\u589e\u5f3a：<\/p>\n

            • \n

              \u4f3d\u9a6c\u6821\u6b63（Gamma Correction） :<\/p>\n

                \n
              • \u9884\u8ba1\u7b97 256 \u5b57\u8282 LUT（Look-Up Table），\u9ed8\u8ba4 \u03b3=2.2\u3002<\/li>\n
              • \u63d0\u4eae\u6697\u90e8\u7ec6\u8282，\u8865\u507f\u70ed\u654f\u7eb8\u4f4e\u7070\u5ea6\u54cd\u5e94\u4e0d\u4f73\u7684\u7269\u7406\u7279\u6027\u3002<\/li>\n<\/ul>\n<\/li>\n
              • \n

                \u5bf9\u6bd4\u5ea6\u589e\u5f3a :<\/p>\n

                  \n
                • \u56db\u7ea7\u5f3a\u5ea6（None \/ Low \/ Medium \/ High）\u3002<\/li>\n
                • \u4f7f\u7528\u5b9a\u70b9\u6570 Q8 \u683c\u5f0f：factor = 256, 286, 320, 358（\u5bf9\u5e94 1.0x, 1.12x, 1.25x, 1.4x）\u3002<\/li>\n
                • \u516c\u5f0f：adjusted = 128 + ((val – 128) * factor) \/ 256，\u9632\u6b62\u6ea2\u51fa\u5e76\u505a\u9971\u548c\u622a\u65ad\u3002<\/li>\n<\/ul>\n<\/li>\n
                  \n

                  5. \u516c\u5171\u57fa\u7840\u8bbe\u65bd\u89e3\u6790<\/h3>\n

                  dither_common.{c,h} \u4f5c\u4e3a\u5404\u7b97\u6cd5\u7684\u5171\u4eab\u5e95\u5ea7，\u907f\u514d\u4e86\u91cd\u590d\u5b9e\u73b0，\u4f53\u73b0\u4e86\u826f\u597d\u7684\u5de5\u7a0b\u62bd\u8c61\u3002<\/p>\n

                  5.1 \u6838\u5fc3\u6570\u636e\u7ed3\u6784<\/h4>\n

                  struct<\/span> dither_config<\/span> {<\/span>
                  \n uint8_t<\/span> threshold;<\/span> \/\/ \u4e8c\u503c\u5316\u9608\u503c（\u9ed8\u8ba4 128）<\/span>
                  \n uint8_t<\/span> contrast_level;<\/span> \/\/ \u5bf9\u6bd4\u5ea6\u7ea7\u522b 0-3<\/span>
                  \n uint8_t<\/span> enable_gamma;<\/span> \/\/ \u662f\u5426\u542f\u7528\u4f3d\u9a6c\u6821\u6b63<\/span>
                  \n uint8_t<\/span> gamma_val;<\/span> \/\/ \u4f3d\u9a6c\u503c\u00d710（\u5982 22 \u8868\u793a 2.2）<\/span>
                  \n uint8_t<\/span> level_index;<\/span> \/\/ \u5f53\u524d\u5c42\u7ea7\u7d22\u5f15<\/span>
                  \n uint8_t<\/span> level_count;<\/span> \/\/ \u603b\u5c42\u7ea7\u6570<\/span>
                  \n}<\/span>;<\/span><\/p>\n

                  \u8bbe\u8ba1\u6280\u5de7: \u5404\u7b97\u6cd5\u7684\u79c1\u6709 xxx_config \u7ed3\u6784\u4f53\u5b57\u6bb5\u5e03\u5c40\u4e0e dither_config \u5b8c\u5168\u4e00\u81f4，\u5141\u8bb8\u901a\u8fc7 \u7c7b\u578b\u53cc\u5173（type punning） \u76f4\u63a5\u590d\u7528\u516c\u5171\u903b\u8f91，\u5982：<\/p>\n

                  dither_apply_enhancement<\/span>(<\/span>(<\/span>const<\/span> struct<\/span> dither_config<\/span> *<\/span>)<\/span>&<\/span>fs-><\/span>config,<\/span> .<\/span>.<\/span>.<\/span>)<\/span>;<\/span><\/p>\n

                  5.2 \u4f4d\u6253\u5305\u4e0e\u5b57\u8282\u5e8f\u5904\u7406<\/h4>\n

                  \u70ed\u654f\u6253\u5370\u673a\u901a\u5e38\u8981\u6c42\u6570\u636e\u6309 MSB \u4f18\u5148 （Most Significant Bit First）\u6253\u5305，\u5373\u50cf\u7d20 0 \u5bf9\u5e94\u5b57\u8282\u6700\u9ad8\u4f4d\u3002<\/p>\n

                  void<\/span> dither_pack_bit<\/span>(<\/span>uint8_t<\/span> *<\/span>out_byte,<\/span> uint8_t<\/span> *<\/span>out_bit,<\/span> uint8_t<\/span> *<\/span>out_idx,<\/span> uint8_t<\/span> bit)<\/span>;<\/span><\/p>\n

                    \n
                  • \u7ef4\u62a4 out_bit \u8ba1\u6570\u5668（0~7），\u6bcf\u6ee1 8 \u4f4d\u81ea\u52a8\u63a8\u8fdb out_idx\u3002<\/li>\n
                  • \u86c7\u5f62\u626b\u63cf\u53cd\u5411\u884c\u5904\u7406\u5b8c\u6bd5\u540e，\u901a\u8fc7 dither_reverse_bits() \u5bf9\u6574\u884c\u5b57\u8282\u505a\u4f4d\u5e8f\u53cd\u8f6c，\u4fdd\u8bc1\u7269\u7406\u6253\u5370\u987a\u5e8f\u4e0e\u56fe\u50cf\u5750\u6807\u4e00\u81f4\u3002<\/li>\n<\/ul>\n
                    \n

                    6. API \u8bbe\u8ba1\u4e0e\u7f16\u7a0b\u6a21\u578b<\/h3>\n

                    \u56db\u79cd\u7b97\u6cd5\u7684 API \u9075\u5faa \u5b8c\u5168\u4e00\u81f4\u7684\u5951\u7ea6\u5f0f\u63a5\u53e3 ，\u964d\u4f4e\u4e86\u7528\u6237\u7684\u5fc3\u667a\u8d1f\u62c5\u3002<\/p>\n

                    6.1 \u6807\u51c6\u4f7f\u7528\u8303\u5f0f<\/h4>\n

                    \u4ee5 Floyd-Steinberg \u4e3a\u4f8b（\u5176\u4f59\u7b97\u6cd5\u4ec5\u66ff\u6362\u524d\u7f00 fs_ \u2192 atkinson_ \/ jjn_ \/ stucki_）：<\/p>\n

                    #<\/span>include<\/span> "dither_process\/fs_process\/fs_process.h"<\/span><\/span><\/p>\n

                    #<\/span>define<\/span> WIDTH<\/span> 384<\/span><\/span><\/span>
                    \n#<\/span>define<\/span> OUT_BUF_SIZE<\/span> (<\/span>WIDTH \/<\/span> 8<\/span> +<\/span> 1<\/span>)<\/span><\/span><\/span><\/p>\n

                    static<\/span> uint8_t<\/span> out_buf[<\/span>OUT_BUF_SIZE]<\/span>;<\/span><\/p>\n

                    \/* 1. \u521b\u5efa\u5b9e\u4f8b（\u6307\u5b9a\u5c42\u7ea7） *\/<\/span>
                    \nstruct<\/span> fs_config<\/span> cfg =<\/span> fs_get_default_config<\/span>(<\/span>)<\/span>;<\/span>
                    \ncfg.<\/span>level_index =<\/span> 0<\/span>;<\/span>
                    \ncfg.<\/span>level_count =<\/span> 16<\/span>;<\/span>
                    \nstruct<\/span> fs_dither<\/span> *<\/span>fs =<\/span> fs_create_with_config<\/span>(<\/span>WIDTH,<\/span> &<\/span>cfg)<\/span>;<\/span><\/p>\n

                    \/* 2. \u9010\u884c\u6d41\u5f0f\u5904\u7406（\u86c7\u5f62\u626b\u63cf：\u5947\u6570\u884c reverse=1） *\/<\/span>
                    \nfor<\/span> (<\/span>uint16_t<\/span> row =<\/span> 0<\/span>;<\/span> row <<\/span> height;<\/span> row++<\/span>)<\/span> {<\/span>
                    \n fs_reset<\/span>(<\/span>fs,<\/span> out_buf)<\/span>;<\/span>
                    \n fs_process_row<\/span>(<\/span>fs,<\/span> y_data[<\/span>row]<\/span>,<\/span> row &<\/span> 1<\/span>)<\/span>;<\/span><\/p>\n

                    uint16_t<\/span> bytes =<\/span> fs_get_output_bytes<\/span>(<\/span>fs)<\/span>;<\/span>
                    \n thermal_print_send_line<\/span>(<\/span>cfg.<\/span>level_index,<\/span> out_buf,<\/span> bytes)<\/span>;<\/span>
                    \n}<\/span><\/p>\n

                    \/* 3. \u91ca\u653e\u8d44\u6e90 *\/<\/span>
                    \nfs_destroy<\/span>(<\/span>fs)<\/span>;<\/span><\/p>\n

                    6.2 \u72b6\u6001\u673a\u751f\u547d\u5468\u671f<\/h4>\n

                    [create] \u2500\u2500\u25ba [reset] \u2500\u2500\u25ba [process_row] \u00d7 N \u2500\u2500\u25ba [destroy]
                    \n \u25b2
                    \n \u2514\u2500\u2500 \u5904\u7406\u4e0b\u4e00\u5e27\u56fe\u50cf\u524d\u53ef\u91cd\u590d\u8c03\u7528<\/p>\n

                      \n
                    • *_create(): \u4e00\u6b21\u6027\u5206\u914d\u6240\u6709\u52a8\u6001\u5185\u5b58（\u8bef\u5dee\u7f13\u51b2 + \u5de5\u4f5c\u7f13\u51b2）\u3002<\/li>\n
                    • *_reset(): \u6e05\u96f6\u8bef\u5dee\u7f13\u51b2，\u7ed1\u5b9a\u65b0\u7684\u8f93\u51fa\u7f13\u51b2\u533a，\u51c6\u5907\u5904\u7406\u65b0\u56fe\u50cf\u3002<\/li>\n
                    • *_process_row(): \u6838\u5fc3\u72b6\u6001\u63a8\u8fdb，\u5185\u90e8\u81ea\u52a8\u7ba1\u7406\u8bef\u5dee\u884c\u4ea4\u6362\u3002<\/li>\n
                    • *_destroy(): \u91ca\u653e\u5806\u5185\u5b58，\u5e76\u7f6e\u7a7a\u6307\u9488（\u9632\u5fa1\u6027\u7f16\u7a0b）\u3002<\/li>\n<\/ul>\n
                      \n

                      7. \u865a\u62df\u6253\u5370\u673a\u9a8c\u8bc1\u4f53\u7cfb<\/h3>\n

                      virtual_printer\/ \u6a21\u5757\u662f\u9879\u76ee\u7684\u4e00\u5927\u5de5\u7a0b\u4eae\u70b9，\u89e3\u51b3\u4e86\u5d4c\u5165\u5f0f\u7b97\u6cd5 \u201c\u65e0\u786c\u4ef6\u5373\u65e0\u6cd5\u9a8c\u8bc1\u201d \u7684\u75db\u70b9\u3002<\/p>\n

                        \n
                      • \u529f\u80fd: \u5c06\u591a\u5c42\u7ea7 1bit \u8f93\u51fa\u5408\u6210\u4e3a\u6807\u51c6 BMP \u7070\u5ea6\u56fe\u50cf\u3002<\/li>\n
                      • \u539f\u7406: \u5bf9\u6bcf\u4e2a\u5c42\u7ea7\u7684 1bit \u6570\u636e\u6309\u6743\u91cd\u53e0\u52a0，\u6a21\u62df\u70ed\u654f\u7eb8\u4e0a\u7684\u58a8\u70b9\u7d2f\u79ef\u6548\u679c\u3002<\/li>\n
                      • \u4ef7\u503c: \u5f00\u53d1\u8005\u53ef\u5728 PC \u7aef\u901a\u8fc7 make run-all \u4e00\u952e\u5bf9\u6bd4\u56db\u79cd\u7b97\u6cd5\u5728\u540c\u4e00\u6d4b\u8bd5\u56fe\u4e0a\u7684\u8868\u73b0，\u65e0\u9700\u8fde\u63a5\u5b9e\u4f53\u6253\u5370\u673a\u3002<\/li>\n<\/ul>\n

                        7.1 PC \u7aef\u5feb\u901f\u9a8c\u8bc1<\/h4>\n

                        cd<\/span> example
                        \nmake<\/span> # \u7f16\u8bd1<\/span>
                        \nmake<\/span> run-all # \u8fd0\u884c\u5168\u90e8 4 \u79cd\u7b97\u6cd5\u7684\u6e10\u53d8 + \u771f\u5b9e\u6570\u636e\u6d4b\u8bd5<\/span>
                        \n# \u751f\u6210 output_*.bmp \u7ed3\u679c\u6587\u4ef6<\/span><\/p>\n

                        7.2 \u771f\u5b9e\u56fe\u50cf\u9a8c\u8bc1<\/h4>\n

                        \u4ee5\u4e0b\u5206\u522b\u4e3a\u771f\u5b9e\u6d4b\u8bd5\u56fe\u539f\u56fe，\u4ee5\u53ca\u56db\u79cd\u7b97\u6cd5\u7ecf\u865a\u62df\u6253\u5370\u673a\u5408\u6210\u540e\u7684\u8f93\u51fa\u5bf9\u6bd4\u3002\u53ef\u89c1\u4e0d\u540c\u7b97\u6cd5\u5728\u771f\u5b9e\u7167\u7247\u4e0a\u7684\u8d28\u611f\u5dee\u5f02：Floyd-Steinberg \u5bf9\u6bd4\u5f3a\u70c8，Atkinson \u6697\u90e8\u5c42\u6b21\u4e30\u5bcc，JJN \/ Stucki \u8fc7\u6e21\u66f4\u81ea\u7136\u3002<\/p>\n

                        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                        \n

                        8. \u5de5\u7a0b\u89c4\u8303\u4e0e\u4ee3\u7801\u8d28\u91cf<\/h3>\n

                        \u9879\u76ee\u901a\u8fc7 doc\/developer_docs（git submodule \u5f15\u5165）\u5f3a\u5236\u63a8\u884c\u5f00\u53d1\u89c4\u8303，\u4f53\u73b0\u4e13\u4e1a\u8f6f\u4ef6\u5de5\u7a0b\u7d20\u517b：<\/p>\n

                          \n
                        • C \u8bed\u8a00\u4ee3\u7801\u7f16\u5199\u89c4\u8303: \u547d\u540d\u89c4\u5219\u3001\u7f29\u8fdb\u3001\u6ce8\u91ca Doxygen \u98ce\u683c\u3001\u9632\u5fa1\u6027\u7f16\u7a0b\u3002<\/li>\n
                        • Git \u63d0\u4ea4\u4fe1\u606f\u89c4\u8303: Conventional Commits \u98ce\u683c，\u4fbf\u4e8e\u81ea\u52a8\u751f\u6210 CHANGELOG\u3002<\/li>\n
                        • Git \u5206\u652f\u7ba1\u7406\u89c4\u8303: \u57fa\u4e8e Git Flow \u6216\u7c7b\u4f3c\u6a21\u578b\u7684\u5206\u652f\u7b56\u7565\u3002<\/li>\n<\/ul>\n

                          8.1 \u4ee3\u7801\u8d28\u91cf\u4eae\u70b9<\/h4>\n
                        • \u9632\u5fa1\u6027\u7f16\u7a0b: \u6240\u6709\u516c\u5171 API \u5165\u53e3\u5747\u8fdb\u884c NULL \u6307\u9488\u68c0\u67e5\u3002<\/li>\n
                        • \u5185\u5b58\u5b89\u5168: destroy \u540e\u663e\u5f0f\u7f6e\u7a7a\u6307\u9488，\u907f\u514d\u60ac\u5782\u6307\u9488；calloc \u521d\u59cb\u5316\u907f\u514d\u810f\u6570\u636e\u3002<\/li>\n
                        • \u65e0 VLA（Variable Length Array）: \u4f7f\u7528 calloc \u5206\u914d work_row，\u517c\u5bb9\u9700\u8981\u56fa\u5b9a\u6808\u7a7a\u95f4\u7684\u786c\u5b9e\u65f6\u7cfb\u7edf\u3002<\/li>\n
                        • \u5185\u8054\u4f18\u5316: \u6838\u5fc3\u50cf\u7d20\u5904\u7406\u51fd\u6570\u6807\u8bb0\u4e3a static inline，\u786e\u4fdd\u5728 -O2 \u4f18\u5316\u4e0b\u5c55\u5f00，\u6d88\u9664\u51fd\u6570\u8c03\u7528\u5f00\u9500\u3002<\/li>\n
                          \n

                          9. \u79fb\u690d\u6307\u5357\u4e0e\u96c6\u6210\u5efa\u8bae<\/h3>\n

                          9.1 \u76f4\u63a5\u96c6\u6210<\/h4>\n

                          \u5c06 src\/dither_process\/ \u76ee\u5f55\u6574\u4f53\u590d\u5236\u5230\u76ee\u6807\u5de5\u7a0b\u7684\u6e90\u7801\u6811，\u5934\u6587\u4ef6\u8def\u5f84\u52a0\u5165\u7f16\u8bd1\u5668\u7684 -I \u9009\u9879\u5373\u53ef\u3002<\/p>\n

                          9.2 \u65e0\u5806（Heap-less）\u6539\u9020<\/h4>\n

                          \u82e5\u76ee\u6807\u7cfb\u7edf\u7981\u6b62\u52a8\u6001\u5185\u5b58（\u5982\u67d0\u4e9b\u5b89\u5168\u5173\u952e\u578b MCU），\u53ef\u6309\u4ee5\u4e0b\u6b65\u9aa4\u6539\u9020：<\/p>\n

                        • \u5c06 struct fs_dither \u6539\u4e3a\u5168\u5c40\u9759\u6001\u53d8\u91cf\u6216\u4f20\u5165\u5916\u90e8\u7f13\u51b2\u533a\u3002<\/li>\n
                        • \u5c06 *_create() \u6539\u9020\u4e3a *_init()，\u63a5\u6536\u5916\u90e8\u9884\u5206\u914d\u7684 err_curr\u3001err_next\u3001work_row \u6307\u9488\u3002<\/li>\n
                        • \u79fb\u9664 stdlib.h \u4f9d\u8d56\u3002<\/li>\n

                          9.3 \u4e0e JPEG \u89e3\u7801\u5668\u5bf9\u63a5<\/h4>\n

                          \u7531\u4e8e\u63a5\u53e3\u4e3a\u9010\u884c\u6d41\u5f0f，\u53ef\u76f4\u63a5\u5bf9\u63a5 libjpeg \u7684 jpeg_read_scanlines() \u6216\u786c\u4ef6 JPEG \u89e3\u7801\u5668\u7684\u884c\u4e2d\u65ad：<\/p>\n

                          while<\/span> (<\/span>jpeg_read_scanlines<\/span>(<\/span>&<\/span>cinfo,<\/span> buffer,<\/span> 1<\/span>)<\/span>)<\/span> {<\/span>
                          \n \/\/ buffer[0] \u5373\u4e3a Y \u5206\u91cf\u884c\u6570\u636e<\/span>
                          \n fs_process_row<\/span>(<\/span>fs,<\/span> buffer[<\/span>0<\/span>]<\/span>,<\/span> row &<\/span> 1<\/span>)<\/span>;<\/span>
                          \n row++<\/span>;<\/span>
                          \n}<\/span><\/p>\n

                          \n

                          10. \u603b\u7ed3\u4e0e\u6280\u672f\u8bc4\u4ef7<\/h3>\n

                          10.1 \u4f18\u52bf<\/h4>\n
                            \n
                          • \u7b97\u6cd5\u5168\u9762: \u8986\u76d6\u4ece\u5feb\u901f（FS）\u5230\u9ad8\u8d28\u91cf（JJN\/Stucki）\u7684\u5b8c\u6574\u7b97\u6cd5\u8c31\u7cfb\u3002<\/li>\n
                          • \u6781\u81f4\u4f18\u5316: \u5b9a\u70b9\u5316\u3001\u6d41\u5f0f\u5904\u7406\u3001\u86c7\u5f62\u626b\u63cf\u3001\u591a\u5c42\u7ea7\u5957\u5370，\u6bcf\u4e00\u5904\u90fd\u4f53\u73b0\u4e86\u5bf9\u5d4c\u5165\u5f0f\u8d44\u6e90\u7ea6\u675f\u7684\u6df1\u523b\u7406\u89e3\u3002<\/li>\n
                          • \u5de5\u7a0b\u6210\u719f: \u4e00\u81f4\u7684 API \u62bd\u8c61\u3001\u5b8c\u5584\u7684 PC \u7aef\u9a8c\u8bc1\u4f53\u7cfb\u3001\u89c4\u8303\u7684\u6587\u6863\u4e0e\u4ee3\u7801\u6807\u51c6，\u53ef\u76f4\u63a5\u7528\u4e8e\u5546\u4e1a\u4ea7\u54c1\u3002<\/li>\n<\/ul>\n

                            10.2 \u9002\u7528\u573a\u666f<\/h4>\n
                              \n
                            • \u4fbf\u643a\u5f0f\u70ed\u654f\u7167\u7247\u6253\u5370\u673a（\u5982\u53e3\u888b\u6253\u5370\u673a\u3001\u9519\u9898\u6253\u5370\u673a）\u3002<\/li>\n
                            • \u6807\u7b7e\u6253\u5370\u673a\u7684\u9ad8\u5206\u8fa8\u7387\u56fe\u7247\u6253\u5370\u6a21\u5f0f\u3002<\/li>\n
                            • \u4efb\u4f55\u9700\u8981\u5c06\u7070\u5ea6\u56fe\u50cf\u8f6c\u6362\u4e3a 1bit \u5e76\u8ffd\u6c42\u89c6\u89c9\u8d28\u91cf\u7684\u5d4c\u5165\u5f0f\u8bbe\u5907\u3002<\/li>\n<\/ul>\n
                              \n","protected":false},"excerpt":{"rendered":"

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