{"id":299,"date":"2024-08-29T23:29:49","date_gmt":"2024-08-29T15:29:49","guid":{"rendered":"https:\/\/www.bertzzz-horizon.xyz\/?p=299"},"modified":"2024-10-20T21:09:26","modified_gmt":"2024-10-20T13:09:26","slug":"floyd-steinberg%e6%8a%96%e5%8a%a8%e7%ae%97%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.bertzzz-horizon.xyz\/?p=299","title":{"rendered":"Floyd-Steinberg\u6296\u52a8\u7b97\u6cd5"},"content":{"rendered":"\n<p>\u5e9f\u8bdd\u4e0d\u591a\u8bf4\uff0c\u5148\u8d34\u4e0a\u53d8\u6362\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"cpp\" class=\"language-cpp\">void applyDithering(Image&amp; image, int width, int height) {\n    for (int y = 0; y &lt; height; ++y) {\n        for (int x = 0; x &lt; width; ++x) {\n            \/\/ \u539f\u50cf\u7d20\u503c\n            int oldPixel = image[y][x];\n            \n            \/\/ \u91cf\u5316\u4e3a0\u6216255\uff08\u5373\u9ed1\u4e0e\u767d\uff09\n            int newPixel = oldPixel &lt; 128 ? 0 : 255;\n            image[y][x] = newPixel;\n\n            \/\/ \u8ba1\u7b97\u8bef\u5dee\n            int error = oldPixel - newPixel;\n\n            \/\/ \u8bef\u5dee\u6269\u6563\u5230\u76f8\u90bb\u50cf\u7d20\n            if (x + 1 &lt; width) {\n                image[y][x + 1] += error * 7 \/ 16;\n                clamp(image[y][x + 1]);\n            }\n            if (x - 1 &gt;= 0 &amp;&amp; y + 1 &lt; height) {\n                image[y + 1][x - 1] += error * 3 \/ 16;\n                clamp(image[y + 1][x - 1]);\n            }\n            if (y + 1 &lt; height) {\n                image[y + 1][x] += error * 5 \/ 16;\n                clamp(image[y + 1][x]);\n            }\n            if (x + 1 &lt; width &amp;&amp; y + 1 &lt; height) {\n                image[y + 1][x + 1] += error * 1 \/ 16;\n                clamp(image[y + 1][x + 1]);\n            }\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u89e3\u91ca\u4e00\u4e0b\u4ec0\u4e48\u662f\u8bef\u5dee\u6269\u6563\u3002\u987e\u540d\u601d\u4e49\uff0c\u5c31\u662f\u8981\u5c06\u6211\u4eec\u8ba1\u7b97\u5f97\u5230\u7684\u8bef\u5dee\u6269\u6563\u5230\u76f8\u90bb\u7684\u50cf\u7d20\u53bb\u3002\u540c\u65f6\uff0c\u6211\u4eec\u9075\u5faa\u4ee5\u4e0b\u539f\u5219\uff1a<\/p>\n\n\n\n<p class=\"has-text-align-center\"><em>\u53f3\u4fa7\u50cf\u7d20\u7684\u8bef\u5dee\u4e3a 7\/16\uff1b<br>\u5de6\u4e0b\u65b9\u50cf\u7d20\u7684\u8bef\u5dee\u4e3a 3\/16\uff1b<br>\u6b63\u4e0b\u65b9\u50cf\u7d20\u7684\u8bef\u5dee\u4e3a 5\/16\uff1b<br>\u53f3\u4e0b\u65b9\u50cf\u7d20\u7684\u8bef\u5dee\u4e3a 1\/16\u3002<\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u5177\u4f53\u5230\u4ee3\u7801\uff08\u53d6\u5176\u4e2d\u4e00\u6bb5\u4e3a\u4f8b\u5b50\uff09\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"cpp\" class=\"language-cpp\">            if (x + 1 &lt; width) {\n                image[y][x + 1] += error * 7 \/ 16;\n                clamp(image[y][x + 1]);\n            }<\/code><\/pre>\n\n\n\n<p>\u6211\u4eec\u5c31\u5c06\u53f3\u4fa7\u7684\u50cf\u7d20\u52a0\u4e0a\u4e4b\u524d\u8ba1\u7b97\u5f97\u5230\u8bef\u5dee\u76847\/16\u3002\u81f3\u4e8e\u4e4b\u540e\u662f\u5982\u4f55\u5224\u65ad\u5f97\u5230\u5de6\u4e0b\/\u4e0b\u65b9\/\u53f3\u4e0b\u50cf\u7d20\u7684\uff0c\u76f8\u4fe1\u4e00\u773c\u5c31\u80fd\u770b\u660e\u767d\u3002\u6211\u4eec\u4f9d\u6b21\u6309\u7167\u7cfb\u6570\u8fdb\u884c\u5982\u4e0a\u8ba1\u7b97\u5373\u53ef\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5e9f\u8bdd\u4e0d\u591a\u8bf4\uff0c\u5148\u8d34\u4e0a\u53d8\u6362\u7684\u4ee3\u7801\u3002 \u89e3\u91ca\u4e00\u4e0b\u4ec0\u4e48\u662f\u8bef\u5dee\u6269\u6563\u3002\u987e\u540d\u601d\u4e49\uff0c\u5c31\u662f\u8981\u5c06\u6211\u4eec\u8ba1\u7b97\u5f97\u5230\u7684\u8bef\u5dee\u6269\u6563\u5230\u76f8\u90bb\u7684\u50cf\u7d20\u53bb [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":304,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_jetpack_memberships_contains_paid_content":false},"categories":[9],"tags":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/www.bertzzz-horizon.xyz\/wordpress\/wp-content\/uploads\/2024\/08\/qKJle.png","_links":{"self":[{"href":"https:\/\/www.bertzzz-horizon.xyz\/index.php?rest_route=\/wp\/v2\/posts\/299"}],"collection":[{"href":"https:\/\/www.bertzzz-horizon.xyz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bertzzz-horizon.xyz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bertzzz-horizon.xyz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bertzzz-horizon.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=299"}],"version-history":[{"count":5,"href":"https:\/\/www.bertzzz-horizon.xyz\/index.php?rest_route=\/wp\/v2\/posts\/299\/revisions"}],"predecessor-version":[{"id":348,"href":"https:\/\/www.bertzzz-horizon.xyz\/index.php?rest_route=\/wp\/v2\/posts\/299\/revisions\/348"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bertzzz-horizon.xyz\/index.php?rest_route=\/wp\/v2\/media\/304"}],"wp:attachment":[{"href":"https:\/\/www.bertzzz-horizon.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=299"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bertzzz-horizon.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=299"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bertzzz-horizon.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=299"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}