{"id":67790,"date":"2017-03-26T01:43:16","date_gmt":"2017-03-25T17:43:16","guid":{"rendered":"http:\/\/www.xiaoyebailong.com\/?p=67790"},"modified":"2017-03-26T01:43:16","modified_gmt":"2017-03-25T17:43:16","slug":"%e4%b8%8d%e8%83%bd%e8%af%b4%e7%9a%84%e7%a7%98%e5%af%86-%e5%89%8d%e7%ab%af%e4%b9%9f%e8%83%bd%e7%8e%a9%e7%9a%84%e5%9b%be%e7%89%87%e9%9a%90%e5%86%99%e6%9c%af","status":"publish","type":"post","link":"http:\/\/www.xiaoyebailong.com\/index.php\/2017\/03\/26\/67790.htm","title":{"rendered":"\u4e0d\u80fd\u8bf4\u7684\u79d8\u5bc6\u2014\u2014\u524d\u7aef\u4e5f\u80fd\u73a9\u7684\u56fe\u7247\u9690\u5199\u672f"},"content":{"rendered":"

\u9690\u5199\u672f\u7b97\u662f\u4e00\u79cd\u52a0\u5bc6\u6280\u672f\uff0c\u6743\u5a01\u7684wiki\u8bf4\u6cd5\u662f\u201c\u9690\u5199\u672f<\/strong>\u662f\u4e00\u95e8\u5173\u4e8e\u4fe1\u606f\u9690\u85cf\u7684\u6280\u5de7\u4e0e\u79d1\u5b66\uff0c\u6240\u8c13\u4fe1\u606f\u9690\u85cf\u6307\u7684\u662f\u4e0d\u8ba9\u9664\u9884\u671f\u7684\u63a5\u6536\u8005\u4e4b\u5916\u7684\u4efb\u4f55\u4eba\u77e5\u6653\u4fe1\u606f\u7684\u4f20\u9012\u4e8b\u4ef6\u6216\u8005\u4fe1\u606f\u7684\u5185\u5bb9\u3002\u201d\u8fd9\u770b\u4f3c\u9ad8\u5927\u4e0a\u7684\u5b9a\u4e49\uff0c\u5e76\u4e0d\u662f\u8fd1\u4ee3\u65b0\u8bde\u751f\u7684\u6280\u672f\uff0c\u65e9\u572813\u4e16\u7eaa\u672b\u5fb7\u56fd\u4ebaTrithemius\u5c31\u5199\u51fa\u4e86\u300a\u9690\u5199\u672f\u300b\u7684\u8457\u4f5c\uff0c\u5b66\u8fc7\u5bc6\u7801\u5b66\u7684\u540c\u5b66\u53ef\u80fd\u77e5\u9053\u3002\u597d\u4e86\uff0c\u8bf4\u4e86\u8fd9\u4e48\u591a\uff0c\u9690\u5199\u672f\u5230\u5e95\u662f\u4ec0\u4e48\u6280\u672f\uff0c\u8ba9\u6211\u4eec\u770b\u4e00\u4e2a\u4f8b\u5b50\u3002<\/p>\n

\u4e0b\u9762\u662f\u4e00\u5f20\u770b\u4f3c\u666e\u901a\u7684\u56fe\u7247\uff0c\u4f46\u5176\u4e2d\u5374\u85cf\u6709\u53e6\u4e00\u4e2a\u8089\u773c\u65e0\u6cd5\u8bc6\u522b\u7684\u56fe\u50cf\u54e6\u3002<\/p>\n

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

\u8fd9\u662f\u5982\u679c\u628a\u4e0a\u56fe\u6bcf\u4e2a\u8272\u5f69\u7a7a\u95f4\u548c\u6570\u5b573\u8fdb\u884c\u903b\u8f91\u4e0e<\/a>\u8fd0\u7b97\uff0c\u518d\u628a\u4eae\u5ea6\u589e\u5f3a85\u500d\uff0c\u53ef\u4ee5\u5f97\u5230\u4e0b\u56fe\u3002<\/p>\n

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

\u7b80\u5355\u7684\u8bf4\uff0c\u4e0a\u8ff0\u7684\u5904\u7406\u8fc7\u7a0b\u53ef\u4ee5\u7406\u89e3\u4e3a\u5bf9\u56fe\u7247\u50cf\u7d20\u7684\u5904\u7406\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u52a0\u5bc6\u7684\u4fe1\u606f\u6563\u5e03\u5728\u6bcf\u4e2a\u50cf\u7d20\u70b9\u4e0a\u3002\u53ef\u662f\uff0c13\u4e16\u7eaa\u8fd8\u6ca1\u6709\u201c\u50cf\u7d20\u201d\u8fd9\u4e2a\u6982\u5ff5\u5427\uff1f\uff01\u6ca1\u9519\uff0c\u4e0a\u9762\u8fd9\u4e2a\u4f8b\u5b50\u53ea\u662f\u9690\u5199\u672f\u7684\u4e00\u4e2a\u73b0\u4ee3\u6280\u672f\u5b9e\u73b0\uff0c\u9690\u85cf\u4fe1\u606f\u7684\u624b\u6bb5\u6709\u5f88\u591a\uff0c\u6211\u4eec\u65e5\u5e38\u7684\u949e\u7968\u9632\u4f2a\u4e5f\u7b97\u662f\u9690\u5199\u672f\u7684\u4e00\u79cd\uff0c\u6240\u4ee5\u6807\u9898\u4e0a\u4e5f\u9650\u5b9a\u4e86\u6211\u4eec\u7684\u8ba8\u8bba\u8303\u56f4\u2014\u2014\u56fe\u7247\u9690\u5199\u672f\u3002<\/p>\n

\"{15AAFDB9-59F0-458E-93EF-AE4E799FA5D2}\"<\/a><\/p>\n

\uff08\u7535\u5b50\u6c34\u5370\u4e0e\u9690\u5199\u672f\u6709\u4e00\u4e9b\u5171\u901a\u70b9\uff09<\/p>\n

\u805a\u7126\u5230\u8f7d\u4f53\u4e3a\u56fe\u7247\u7684\u9690\u5199\u672f\uff0c\u4e00\u8d77\u6765\u4ece\u524d\u7aef\u89d2\u5ea6\u5206\u6790\u5176\u6280\u672f\u539f\u7406\u3002<\/p>\n

\u6211\u4eec\u77e5\u9053\u56fe\u7247\u7684\u50cf\u7d20\u4fe1\u606f\u91cc\u5b58\u50a8\u7740RGB\u7684\u8272\u503c\uff0cR\u3001G\u3001B\u5206\u522b\u4e3a\u8be5\u50cf\u7d20\u7684\u7ea2\u3001\u7eff\u3001\u84dd\u901a\u9053\uff0c\u6bcf\u4e2a\u901a\u9053\u7684\u5206\u91cf\u503c\u8303\u56f4\u57280~255\uff0c16\u8fdb\u5236\u5219\u662f00~FF\u3002\u5728CSS\u4e2d\u7ecf\u5e38\u4f7f\u7528\u517616\u8fdb\u5236\u5f62\u5f0f\uff0c\u6bd4\u5982\u6307\u5b9a\u535a\u5ba2\u5934\u90e8\u80cc\u666f\u8272\u4e3a#A9D5F4\u3002\u5176\u4e2dR\uff08\u7ea2\u8272\uff09\u768416\u8fdb\u5236\u503c\u4e3aA9\uff0c\u6362\u7b97\u6210\u5341\u8fdb\u5236\u4e3a169\u3002\u8fd9\u65f6\u5019\uff0c\u5bf9R\u5206\u91cf\u7684\u503c+1\uff0c\u5373\u4e3a170\uff0c\u6574\u4e2a\u50cf\u7d20RGB\u503c\u4e3a#AAD5F4\uff0c\u522b\u8bf4\u4f60\u770b\u4e0d\u51fa\u5dee\u522b\uff0c\u5c31\u8fde\u706b\u773c\u91d1\u91d1\u7684\u201c\u50cf\u7d20\u773c\u201d\u8bbe\u8ba1\u5e08\u90fd\u5bdf\u89c9\u4e0d\u51fa\u6765\u5462\u3002\u4e8e\u6b64\u540c\u65f6\uff0c\u4fee\u6539G\u3001B\u7684\u5206\u91cf\u503c\uff0c\u4e5f\u662f\u6211\u4eec\u65e0\u6cd5\u5bdf\u89c9\u7684\u3002\u56e0\u6b64\u53ef\u4ee5\u5f97\u51fa\u91cd\u8981\u7ed3\u8bba\uff1aRGB\u5206\u91cf\u503c\u7684\u5c0f\u91cf\u53d8\u52a8\uff0c\u662f\u8089\u773c\u65e0\u6cd5\u5206\u8fa8\u7684\uff0c\u4e0d\u5f71\u54cd\u5bf9\u56fe\u7247\u7684\u8bc6\u522b\u3002<\/strong><\/p>\n

\u6709\u4e86\u8fd9\u4e2a\u7ed3\u8bba\uff0c\u90a3\u5c31\u7ed9\u6211\u4eec\u4e86\u5229\u7528\u7a7a\u95f4\uff0c\u5e38\u7528\u624b\u6bb5\u7684\u5c31\u662f\u5bf9\u4e8c\u8fdb\u5236\u6700\u4f4e\u4f4d\u8fdb\u884c\u64cd\u4f5c\uff0c\u4e0b\u9762\u5c31\u7528canvas\u6765\u6f14\u793a\u4e00\u4e0b\u3002<\/p>\n

\u89e3\u5f00\u56fe\u4e2d\u7684\u79d8\u5bc6<\/h2>\n

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

\u8fd9\u662f\u4e00\u5f20\u6211\u4eec\u5f53\u5bb6\u7f8e\u5973\u5c0f\u5170\u5e08\u59d0\u7684\u7167\u7247\uff0c\u4e3a\u4e86\u8ba9\u4f8b\u5b50\u8db3\u591f\u7b80\u5355\uff0c\u91cc\u9762\u7684R\u901a\u9053\u5206\u91cf\u88ab\u6211\u52a0\u5165\u4e86\u6587\u672c\u4fe1\u606f\uff0c\u60f3\u77e5\u9053\u5176\u4e2d\u7684\u4fe1\u606f\uff0c\u53ef\u4ee5\u8ddf\u6211\u7528canvas\u4ee3\u7801\u6765\u89e3\u5f00\u3002<\/p>\n

\u9996\u5148\u5728\u9875\u9762\u52a0\u5165\u4e00\u4e2acanvas\u6807\u7b7e\uff0c\u5e76\u83b7\u53d6\u5230\u5176\u4e0a\u4e0b\u6587\u3002<\/p>\n

\n
<\/div>\n
\n\n\n\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n
\n
\n
<<\/span>canvas <\/span>id<\/span>=<\/span>“canvas”<\/span> width<\/span>=<\/span>“256”<\/span> height<\/span>=<\/span>“256”<\/span>><\/span><<\/span>\/<\/span>canvas<\/span>><\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\n
<\/div>\n
\n\n\n\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n
\n
\n
var<\/span> ctx<\/span> =<\/span> document<\/span>.<\/span>getElementById<\/span>(<\/span>‘canvas’<\/span>)<\/span>.<\/span>getContext<\/span>(<\/span>‘2d’<\/span>)<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u63a5\u7740\u5c06\u56fe\u7247\u5148\u7ed8\u5236\u5728\u753b\u5e03\u4e0a\uff0c\u7136\u540e\u83b7\u53d6\u5176\u50cf\u7d20\u6570\u636e\u3002<\/p>\n

\n
<\/div>\n
\n\n\n\n
\n
\n
1<\/div>\n
2<\/div>\n
3<\/div>\n
4<\/div>\n
5<\/div>\n
6<\/div>\n
7<\/div>\n
8<\/div>\n
9<\/div>\n<\/div>\n<\/td>\n
\n
\n
var<\/span> img<\/span> =<\/span> new<\/span> Image<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
var<\/span> originalData<\/span>;<\/span><\/div>\n
img<\/span>.<\/span>onload<\/span> =<\/span> function<\/span>(<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>ctx<\/span>.<\/span>drawImage<\/span>(<\/span>img<\/span>,<\/span> 0<\/span>,<\/span> 0<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ \u83b7\u53d6\u6307\u5b9a\u533a\u57df\u7684canvas\u50cf\u7d20\u4fe1\u606f<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>originalData<\/span> =<\/span> ctx<\/span>.<\/span>getImageData<\/span>(<\/span>0<\/span>,<\/span> 0<\/span>,<\/span> ctx<\/span>.<\/span>canvas<\/span>.<\/span>width<\/span>,<\/span> ctx<\/span>.<\/span>canvas<\/span>.<\/span>height<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>console<\/span>.<\/span>log<\/span>(<\/span>originalData<\/span>)<\/span>;<\/span><\/div>\n
}<\/span>;<\/span><\/div>\n
img<\/span>.<\/span>src<\/span> =<\/span> ‘xiaolan.png’<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u6253\u5370\u51fa\u6570\u636e\uff0c\u4f1a\u770b\u5230\u6709\u4e00\u4e2a\u975e\u5e38\u5927\u7684\u6570\u7ec4\u3002<\/p>\n

 <\/p>\n

\"QQ\u622a\u56fe20160325174947\"<\/a><\/p>\n

\u8fd9\u4e2a\u4e00\u7ef4\u6570\u7ec4\u5b58\u50a8\u4e86\u6240\u6709\u7684\u50cf\u7d20\u4fe1\u606f\uff0c\u4e00\u5171\u6709 256 * 256 * 4 = 262144\u4e2a\u503c\u3002\u5176\u4e2d4\u4e2a\u503c\u4e00\u7ec4\uff0c\u4e3a\u4ec0\u4e48\u5462\uff1f\u5728\u6d4f\u89c8\u5668\u4e2d\u89e3\u6790\u56fe\u7247\uff0c\u9664\u4e86RGB\u503c\u5916\uff0c\u6bcf\u7ec4\u7b2c4\u4e2a\u503c\u4e3a\u900f\u660e\u5ea6\u503c\uff0c\u5373\u50cf\u7d20\u4fe1\u606f\u5b9e\u9645\u4e3a\u5927\u5bb6\u719f\u77e5\u7684rgba\u503c\u3002<\/p>\n

\u8fd9\u91cc\u7684\u89e3\u5bc6\u89c4\u5219\u662f\u5bf9R\u901a\u9053\u8fdb\u884c\u5904\u7406\uff0cR\u7684\u5206\u91cf\u6700\u4f4e\u4f4d\u4e3a1\u5219\u8be5\u50cf\u7d20\u8bbe\u4e3a\u7ea2\u8272\uff0cR\u7684\u5206\u91cf\u6700\u4f4e\u4f4d\u4e3a0\u5219\u8be5\u50cf\u7d20\u8bbe\u4e3a\u9ed1\u8272\uff0c\u76f4\u63a5\u770b\u4ee3\u7801\u5b9e\u73b0\uff0c\u5b8c\u6210\u540e\u6211\u4eec\u518d\u7ed8\u5236\u5230canvas\uff0c\u5373\u53ef\u770b\u5230\u7ed3\u679c\u3002<\/p>\n

\n
<\/div>\n
\n\n\n\n
\n
\n
1<\/div>\n
2<\/div>\n
3<\/div>\n
4<\/div>\n
5<\/div>\n
6<\/div>\n
7<\/div>\n
8<\/div>\n
9<\/div>\n
10<\/div>\n
11<\/div>\n
12<\/div>\n
13<\/div>\n
14<\/div>\n
15<\/div>\n
16<\/div>\n
17<\/div>\n
18<\/div>\n
19<\/div>\n
20<\/div>\n
21<\/div>\n<\/div>\n<\/td>\n
\n
\n
var<\/span> processData<\/span> =<\/span> function<\/span>(<\/span>originalData<\/span>)<\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>var<\/span> data<\/span> =<\/span> originalData<\/span>.<\/span>data<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>for<\/span>(<\/span>var<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> data<\/span>.<\/span>length<\/span>;<\/span> i<\/span>++<\/span>)<\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>if<\/span>(<\/span>i<\/span> %<\/span> 4<\/span> ==<\/span> 0<\/span>)<\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ \u7ea2\u8272\u5206\u91cf<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>if<\/span>(<\/span>data<\/span>[<\/span>i<\/span>]<\/span> %<\/span> 2<\/span> ==<\/span> 0<\/span>)<\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>data<\/span>[<\/span>i<\/span>]<\/span> =<\/span> 0<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span> else<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>data<\/span>[<\/span>i<\/span>]<\/span> =<\/span> 255<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span> else<\/span> if<\/span>(<\/span>i<\/span> %<\/span> 4<\/span> ==<\/span> 3<\/span>)<\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ alpha\u901a\u9053\u4e0d\u505a\u5904\u7406<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>continue<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span> else<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ \u5173\u95ed\u5176\u4ed6\u5206\u91cf\uff0c\u4e0d\u5173\u95ed\u4e5f\u4e0d\u5f71\u54cd\u7b54\u6848\uff0c\u751a\u81f3\u66f4\u7f8e\u89c2 o(^\u25bd^)o<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>data<\/span>[<\/span>i<\/span>]<\/span> =<\/span> 0<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ \u5c06\u7ed3\u679c\u7ed8\u5236\u5230\u753b\u5e03<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>ctx<\/span>.<\/span>putImageData<\/span>(<\/span>originalData<\/span>,<\/span> 0<\/span>,<\/span> 0<\/span>)<\/span>;<\/span><\/div>\n
}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u5728img onload\u4e8b\u4ef6\u4e2d\u8c03\u7528processData\u65b9\u6cd5\uff0c\u5c31\u53ef\u4ee5\u770b\u5230\u7ed3\u679c\u5566\u3002<\/p>\n

\u5f97\u5230\u7684\u7ed3\u679c\u53ef\u80fd\u662f\u8fd9\u4e2a\u6837\u5b50\u7684\u3002<\/p>\n

 <\/p>\n

\u5728\u56fe\u7247\u4e2d\u9690\u85cf\u4fe1\u606f<\/h2>\n

\u8bb2\u4e86\u57fa\u7840\u7684\u89e3\u5bc6\u8fc7\u7a0b\uff0c\u518d\u6765\u53cd\u5411\u8bf4\u8bf4\u52a0\u5bc6\u8fc7\u7a0b\u3002<\/p>\n

\u65e2\u7136\u8981\u5728\u56fe\u7247\u4e2d\u52a0\u5165\u6587\u5b57\u4fe1\u606f\uff0c\u90a3\u4e48\u9996\u5148\u8981\u83b7\u53d6\u6587\u5b57\u7684\u50cf\u7d20\u4fe1\u606f\uff0c\u8fd9\u91cc\u6211\u5148\u7528canvas\u5728\u753b\u5e03\u4e0a\u6253\u5370\u6587\u5b57\uff0c\u83b7\u53d6\u50cf\u7d20\u4fe1\u606f\u3002<\/p>\n

\n
<\/div>\n
\n\n\n\n
\n
\n
1<\/div>\n
2<\/div>\n
3<\/div>\n
4<\/div>\n
5<\/div>\n<\/div>\n<\/td>\n
\n
\n
var<\/span> textData<\/span>;<\/span><\/div>\n
\/\/ \u8fd9\u4e9bcanvas API\uff0c\u597d\u4e45\u6ca1\u7528\uff0c\u9700\u8981\u67e5API\u6587\u6863\u4e86T_T<\/span><\/div>\n
ctx<\/span>.<\/span>font<\/span> =<\/span> ’30px Microsoft Yahei’<\/span>;<\/span><\/div>\n
ctx<\/span>.<\/span>fillText<\/span>(<\/span>‘\u5e7f\u544a\u4f4d\u62db\u79dfu’<\/span>,<\/span> 60<\/span>,<\/span> 130<\/span>)<\/span>;<\/span><\/div>\n
textData<\/span> =<\/span> ctx<\/span>.<\/span>getImageData<\/span>(<\/span>0<\/span>,<\/span> 0<\/span>,<\/span> ctx<\/span>.<\/span>canvas<\/span>.<\/span>width<\/span>,<\/span> ctx<\/span>.<\/span>canvas<\/span>.<\/span>height<\/span>)<\/span>.<\/span>data<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u5148\u4fdd\u5b58\u6587\u5b57\u7684\u50cf\u7d20\u4fe1\u606f\uff0c\u63a5\u7740\u52a0\u8f7d\u56fe\u7247\u83b7\u53d6\u5176\u50cf\u7d20\u4fe1\u606f\uff0c\u7136\u540e\u5bf9\u4e24\u7ec4\u50cf\u7d20\u8fdb\u884c\u5904\u7406\uff0c\u6211\u5728\u8fd9\u91cc\u62bd\u79bb\u4e86\u4e00\u4e2a\u516c\u5171\u65b9\u6cd5\u3002<\/p>\n

\n
<\/div>\n
\n\n\n\n
\n
\n
1<\/div>\n
2<\/div>\n
3<\/div>\n
4<\/div>\n
5<\/div>\n
6<\/div>\n
7<\/div>\n
8<\/div>\n
9<\/div>\n
10<\/div>\n
11<\/div>\n
12<\/div>\n
13<\/div>\n
14<\/div>\n
15<\/div>\n
16<\/div>\n
17<\/div>\n
18<\/div>\n
19<\/div>\n
20<\/div>\n
21<\/div>\n
22<\/div>\n
23<\/div>\n
24<\/div>\n
25<\/div>\n
26<\/div>\n
27<\/div>\n
28<\/div>\n
29<\/div>\n
30<\/div>\n
31<\/div>\n
32<\/div>\n
33<\/div>\n
34<\/div>\n
35<\/div>\n
36<\/div>\n
37<\/div>\n
38<\/div>\n
39<\/div>\n
40<\/div>\n
41<\/div>\n<\/div>\n<\/td>\n
\n
\n
var<\/span> mergeData<\/span> =<\/span> function<\/span>(<\/span>newData<\/span>,<\/span> color<\/span>)<\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>var<\/span> oData<\/span> =<\/span> originalData<\/span>.<\/span>data<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>var<\/span> bit<\/span>,<\/span> offset<\/span>;<\/span>\u00a0\u00a0<\/span>\/\/ offset\u7684\u4f5c\u7528\u662f\u627e\u5230alpha\u901a\u9053\u503c\uff0c\u8fd9\u91cc\u9700\u8981\u5927\u5bb6\u81ea\u5df1\u52a8\u52a8\u8111\u7b4b<\/span><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>switch<\/span>(<\/span>color<\/span>)<\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>case<\/span> ‘R’<\/span>:<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>bit<\/span> =<\/span> 0<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>offset<\/span> =<\/span> 3<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>break<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>case<\/span> ‘G’<\/span>:<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>bit<\/span> =<\/span> 1<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>offset<\/span> =<\/span> 2<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>break<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>case<\/span> ‘B’<\/span>:<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>bit<\/span> =<\/span> 2<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>offset<\/span> =<\/span> 1<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>break<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>for<\/span>(<\/span>var<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> oData<\/span>.<\/span>length<\/span>;<\/span> i<\/span>++<\/span>)<\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>if<\/span>(<\/span>i<\/span> %<\/span> 4<\/span> ==<\/span> bit<\/span>)<\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ \u53ea\u5904\u7406\u76ee\u6807\u901a\u9053<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>if<\/span>(<\/span>newData<\/span>[<\/span>i<\/span> +<\/span> offset<\/span>]<\/span> ===<\/span> 0<\/span> &&<\/span> (<\/span>oData<\/span>[<\/span>i<\/span>]<\/span> %<\/span> 2<\/span> ===<\/span> 1<\/span>)<\/span>)<\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ \u6ca1\u6709\u4fe1\u606f\u7684\u50cf\u7d20\uff0c\u8be5\u901a\u9053\u6700\u4f4e\u4f4d\u7f6e0\uff0c\u4f46\u4e0d\u8981\u8d8a\u754c<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>if<\/span>(<\/span>oData<\/span>[<\/span>i<\/span>]<\/span> ===<\/span> 255<\/span>)<\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>oData<\/span>[<\/span>i<\/span>]<\/span>—<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span> else<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>oData<\/span>[<\/span>i<\/span>]<\/span>++<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span> else<\/span> if<\/span> (<\/span>newData<\/span>[<\/span>i<\/span> +<\/span> offset<\/span>]<\/span> !==<\/span> 0<\/span> &&<\/span> (<\/span>oData<\/span>[<\/span>i<\/span>]<\/span> %<\/span> 2<\/span> ===<\/span> 0<\/span>)<\/span>)<\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ \/\/ \u6709\u4fe1\u606f\u7684\u50cf\u7d20\uff0c\u8be5\u901a\u9053\u6700\u4f4e\u4f4d\u7f6e1\uff0c\u53ef\u4ee5\u60f3\u60f3\u4e0a\u9762\u7684\u6591\u70b9\u6548\u679c\u662f\u600e\u4e48\u5b9e\u73b0\u7684<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>if<\/span>(<\/span>oData<\/span>[<\/span>i<\/span>]<\/span> ===<\/span> 255<\/span>)<\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>oData<\/span>[<\/span>i<\/span>]<\/span>—<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span> else<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>oData<\/span>[<\/span>i<\/span>]<\/span>++<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>ctx<\/span>.<\/span>putImageData<\/span>(<\/span>originalData<\/span>,<\/span> 0<\/span>,<\/span> 0<\/span>)<\/span>;<\/span><\/div>\n
}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u4e0a\u8ff0\u4ee3\u7801\u505a\u7684\u662f\uff0c\u63a5\u53d7\u8981\u9690\u85cf\u7684\u6570\u636e\u4ee5\u53ca\u9690\u85cf\u7684\u989c\u8272\u901a\u9053\uff0c\u7136\u540e\u5bf9\u539f\u56fe\u8fdb\u884c\u64cd\u4f5c\uff0c\u4fee\u6539\u56fe\u7247\u8be5\u901a\u9053\u5206\u91cf\u7684\u6700\u4f4e\u4f4d\uff0c\u5982\u679c\u6709\u6587\u5b57\u4fe1\u606f\uff0c\u5219\u6700\u4f4e\u4f4d\u7f6e\u4e3a1\uff0c\u5426\u5219\u4e3a0\u3002\u4ece\u6700\u6587\u7ae0\u5f00\u5934\u7684\u7ed3\u8bba\u77e5\u9053\uff0cRGB\u7684\u4e09\u4e2a\u901a\u9053\u53ef\u4ee5\u5206\u522b\u9690\u85cf\u4e0d\u540c\u4fe1\u606f\u3002<\/p>\n

\u5728img.onload\u4e2d\u8c03\u7528mergeData(textData, ‘R’)\uff0c\u5904\u7406\u597d\u56fe\u50cf\u540e\uff0c\u53ea\u8981\u5728\u6d4f\u89c8\u5668\u4e2d\u7684canvas\u4e0a\u53f3\u952e\u4fdd\u5b58\u56fe\u7247\u5373\u53ef\u3002<\/p>\n

\u8fd9\u91cc\u7684\u4f8b\u5b50\u6bd4\u8f83\u7b80\u5355\uff0c\u53ea\u5c55\u793a\u4e86\u57fa\u672c\u7684\u6700\u4f4e\u4f4d\u9690\u85cf\u6587\u672c\u4fe1\u606f\uff0c\u50cf\u4e8c\u7ef4\u7801\u8fd9\u4e9b\u7b80\u5355\u56fe\u5f62\u4e5f\u53ef\u4ee5\u8fd9\u4e48\u5904\u7406\u3002\u73b0\u5b9e\u4e2d\u9690\u85cf\u753b\u4e2d\u753b\u5219\u9700\u8981\u66f4\u4e13\u4e1a\u7684\u56fe\u50cf\u5904\u7406\u7b97\u6cd5\uff0c\u8fd9\u91cc\u5c31\u4e0d\u518d\u5c55\u5f00\u4e86\u3002<\/p>\n

\u5e94\u7528\u4ef7\u503c<\/h2>\n

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