{"id":2916,"date":"2013-01-07T18:21:29","date_gmt":"2013-01-07T10:21:29","guid":{"rendered":"http:\/\/www.zhangxinxu.com\/wordpress\/?p=2916"},"modified":"2018-01-02T02:29:41","modified_gmt":"2018-01-01T18:29:41","slug":"progressive-jpeg-image-and-so-on","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2013\/01\/progressive-jpeg-image-and-so-on\/","title":{"rendered":"\u6e10\u8fdb\u5f0fjpeg(progressive jpeg)\u56fe\u7247\u53ca\u5176\u76f8\u5173"},"content":{"rendered":"<p>by <a href=\"http:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"http:\/\/www.zhangxinxu.com\/\">http:\/\/www.zhangxinxu.com<\/a><br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"http:\/\/www.zhangxinxu.com\/wordpress\/?p=2916\">http:\/\/www.zhangxinxu.com\/wordpress\/?p=2916<\/a><\/p>\n<h3>\u4e00\u3001\u57fa\u672cJPEG(baseline jpeg)\u548c\u6e10\u8fdbJPEG<\/h3>\n<p>\u7f51\u7edc\u4e0a\u90a3\u4e9b\u8272\u8272\u7684\u7167\u7247\u90fd\u662f<code>.jpg<\/code>\u683c\u5f0f\u7684\uff08\u201c\u8272\u8272\u201d\u6307\u7684\u662f\u8272\u5f69\u6591\u6593\u7684\u610f\u601d<img decoding=\"async\" src=\"http:\/\/mat1.gtimg.com\/www\/mb\/images\/face\/98.gif\" \/>\uff09\u3002<\/p>\n<p>\u4e0d\u77e5\u8bf8\u4f4d\u6709\u6ca1\u6709\u6ce8\u610f\u5230\uff0c\u8fd9\u4e9b<code>jpg<\/code>\u683c\u5f0f\u7684\u56fe\u7247\u5728\u5448\u73b0\u7684\u65f6\u5019\uff0c\u6709\u4e24\u79cd\u65b9\u5f0f\uff0c\u4e00\u79cd\u662f\u81ea\u4e0a\u800c\u4e0b\u626b\u63cf\u5f0f\u7684\uff0c\u8fd8\u6709\u4e00\u79cd\u5c31\u662f\u5148\u662f\u5168\u90e8\u7684\u6a21\u7cca\u56fe\u7247\uff0c\u7136\u540e\u9010\u6e10\u6e05\u6670(\u5c31\u50cfGIF\u683c\u5f0f\u7684\u4ea4\u9519\u663e\u793a)\uff0c\u4f8b\u5982\u4e0b\u9762\u7684\u793a\u610f\uff08\u56fe\u7247\u6765\u6e90\uff1a<a href=\"http:\/\/codinghorror.typepad.com\">http:\/\/codinghorror.typepad.com<\/a>\uff09\uff1a<\/p>\n<p>\u4e00\u822c\u7ebf\u6027\u52a0\u8f7d\uff08\u5982\u4e0d\u80fd\u663e\u793a<a href=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201301\/baseline-jpeg.gif\">\u70b9\u51fb\u8fd9\u91cc<\/a>\u67e5\u770b\uff09<br \/>\n<img loading=\"lazy\" decoding=\"async\" width=\"310\" height=\"248\" src=\"http:\/\/codinghorror.typepad.com\/.a\/6a0120a85dcdae970b0128776fcab6970c-pi\"><\/p>\n<p>\u4ea4\u9519\/\u6e10\u8fdb\u5f0f\uff08\u82e5\u65e0\u6cd5\u663e\u793a<a href=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201301\/progressive-jpeg.gif\">\u70b9\u51fb\u8fd9\u91cc<\/a>\u67e5\u770b\uff09<br \/>\n<img loading=\"lazy\" decoding=\"async\" width=\"310\" height=\"248\" src=\"http:\/\/codinghorror.typepad.com\/.a\/6a0120a85dcdae970b0128776fcadb970c-pi\"><\/p>\n<p>\u4f60\u7f51\u7ad9\u7684<code>jpg<\/code>\u56fe\u7247\u662f\u4ee5\u4f55\u79cd\u65b9\u5f0f\u5448\u73b0\u7684\u5462\uff1f<\/p>\n<p>\u6211\u731c\u4f60\u662f\u201c\u81ea\u4e0a\u800c\u4e0b\u626b\u63cf\u5f0f\u201d\u7684\uff0c\u64e6\u64e6~<img decoding=\"async\" src=\"http:\/\/mat1.gtimg.com\/www\/mb\/images\/face\/4.gif\" \/><\/p>\n<p>\u6211\u5728\u8d34\u5427\u770b\u6d77\u8d3c\u706b\u5f71\u6f2b\u753b\u65f6\u5019\uff0c\u65f6\u4e0d\u65f6\u4f1a\u53d1\u73b0\uff0c\u5176\u4e2d\u90e8\u5206\u56fe\u7247\u5c31\u662f\u6e10\u8fdb\u5f0f\u52a0\u8f7d\u7684\uff0c\u5982\u4e0b\u622a\u56fe\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\u6d77\u8d3c\u738b \u6700\u5371\u9669\u7684\u7537\u4eba \" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201301\/2013-01-07_161435.png\" title=\"\u6d77\u8d3c\u738b \u6700\u5371\u9669\u7684\u7537\u4eba \" class=\"alignnone\" width=\"545\" height=\"478\" \/><\/p>\n<p><strong>\u56fe\u7247\u7684\u5c3a\u5bf8\u5927\u5c0f<\/strong><br \/>\n\u540c\u4e00\u5f20<code>jpg<\/code>\u56fe\u7247\uff0c\u5982\u679c\u4fdd\u5b58\u4e3a\u57fa\u672c\u5f0f\u548c\u6e10\u8fdb\u5f0f\u90a3\u4e2a\u5c3a\u5bf8\u66f4\u5c0f\u5462\uff1f<\/p>\n<p>\u6839\u636e\u6211\u62ff3\u7ec8\u4e0d\u540c\u98ce\u683c\u56fe\u7247\u505a\u6d4b\u8bd5\uff0c\u53d1\u73b0\uff0c\u767e\u5ea6\u767e\u79d1\u4e2d\u6240\u8bf4\u7684\u6e10\u8fdb\u5f0f\u56fe\u7247\u7684\u5927\u5c0f\u6bd4\u57fa\u672c\u5f0f\u7684\u5c0f\u662f\u4e0d\u51c6\u786e\u7684\u3002<\/p>\n<p>\u5176\u4e2d\uff0c\u4e24\u8005\u5927\u5c0f\u5173\u7cfb\u57fa\u672c\u4e0a\u6ca1\u6709\u4ec0\u4e48\u89c4\u5f8b\u3002\u4e0b\u9762\u662f\u6211\u7684\u6d4b\u8bd5\u7ed3\u679c\uff1a<\/p>\n<table width=\"500\" border=\"0\" cellspacing=\"1\" cellpadding=\"0\" class=\"params_table\">\n<tr>\n<th width=\"90\" scope=\"col\">\u56fe\u7247\u7f29\u7565\u56fe<\/th>\n<th width=\"410\" scope=\"col\">\u6d4b\u8bd5\u7ed3\u679c<\/th>\n<\/tr>\n<tr>\n<td align=\"center\"><img decoding=\"async\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201301\/jpeg-test-1.png\" \/><\/td>\n<td>\u56fe\u7247\u54c1\u8d2859%\u53ca\u5176\u4ee5\u4e0b\u65f6\u5019\uff0c\u6e10\u8fdbJPEG\u56fe\u7247\u66f4\u5c0f\uff1b\u54c1\u8d2860%\u53ca\u5176\u4ee5\u4e0a\uff0c\u57fa\u672cJPEG\u66f4\u5c0f<\/td>\n<\/tr>\n<tr>\n<td align=\"center\"><img decoding=\"async\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201301\/jpeg-test-2.png\" \/><\/td>\n<td>\u56fe\u7247\u54c1\u8d2882%\u53ca\u5176\u4ee5\u4e0a\u65f6\u5019\uff0c\u6e10\u8fdbJPEG\u56fe\u7247\u66f4\u5c0f\uff1b\u54c1\u8d2881%\u53ca\u5176\u4ee5\u4e0b\uff0c\u57fa\u672cJPEG\u66f4\u5c0f<\/td>\n<\/tr>\n<tr>\n<td align=\"center\"><img decoding=\"async\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201301\/jpeg-test-3.png\" \/><\/td>\n<td>\u65e0\u8bba\u56fe\u7247\u54c1\u8d28\u591a\u5c11\uff0c\u90fd\u662f\u6e10\u8fdbJPEG\u56fe\u7247\u66f4\u5c0f<\/td>\n<\/tr>\n<\/table>\n<p>\u4e0d\u8fc7\uff0c\u4e2a\u4eba\u81c6\u6d4b\uff0c\u4ece\u6982\u7387\u5b66\u4e0a\u8bb2\uff0c\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u6e10\u8fdb\u5f0fJPEG\u6bd4\u57fa\u672c\u5f0f\u56fe\u7247\u5c3a\u5bf8\u5c0f\u4e00\u70b9\u3002\u7136\u800c\uff0c\u5176\u4e2d\u7684\u5927\u5c0f\u5dee\u5f02\u4e0e\u539f\u56fe\u5c3a\u5bf8\u76f8\u6bd4\uff0c\u4e0d\u503c\u4e00\u63d0\uff0c\u56e0\u6b64\uff0c\u6240\u8c13\u56fe\u7247\u5927\u5c0f\u4e0d\u80fd\u4f5c\u4e3a\u4e24\u79cd\u56fe\u7247\u9009\u62e9\u7684\u4f9d\u636e\u3002<\/p>\n<p><strong>\u4e0b\u8f7d\u5448\u73b0\u901f\u5ea6<\/strong><br \/>\n\u4e00\u4e2a\u540d\u53eb<a href=\"http:\/\/htmlhive.com\/\">Ann Robson<\/a>\u7684\u4eba\uff0c\u6700\u8fd1\u5bf9\u5404\u4e2a\u6d4f\u89c8\u5668\u4e0b\u6e10\u8fdb\u5f0f\u56fe\u7247\u5448\u73b0\u505a\u4e86\u6d4b\u8bd5\u3002<\/p>\n<p>\u4e0b\u56fe\u4e3aFireFox\u6d4f\u89c8\u5668\u4e0b\u5448\u73b0\u901f\u5ea6\u7684\u5bf9\u6bd4\u56fe\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\u4e73\u732a\u52a0\u8f7d\u5bf9\u6bd4\u56fe \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201301\/kickass-pjpeg.jpg\" title=\"\u4e73\u732a\u52a0\u8f7d\u5bf9\u6bd4\u56fe\" class=\"alignnone\" width=\"495\" height=\"335\" \/><\/p>\n<p>\u5f53\u5927\u56fe\u8f6e\u5ed3\u52a0\u8f7dOK\u7684\u65f6\u5019\uff0c\u5c0f\u56fe\u6700\u540e\u4e00\u4e2a\u4e73\u732a\u8fd8\u6ca1\u6709\u51fa\u4e16\u9762\uff1b\u800c\u57fa\u672c\u5f0f\u4e73\u732a\u56fe\u8fd8\u6ca1\u6709\u5f00\u59cb\u52a0\u8f7d\uff01\u663e\u7136\uff0c\u7f57\u4f2f\u68ee\u662f\u60f3\u544a\u8bc9\u6211\u4eec\uff0c\u6e10\u8fdbJPEG\u4e0b\u8f7d\u66f4\u5feb\u3002<\/p>\n<p>\u4e0b\u8868\u4e3a\u5176\u5728\u5404\u4e2a\u6d4f\u89c8\u5668\u4e0b\u6d4b\u8bd5\u7684\u7ed3\u679c\uff1a<\/p>\n<style>.params_table .positiveCell{background-color:#C0E9B1;}.params_table .negativeCell{background-color:#FBBFBC;}<\/style>\n<table width=\"100%\" border=\"0\" cellspacing=\"1\" cellpadding=\"0\" class=\"params_table\">\n<tbody>\n<tr class=\"imagemenot\">\n<th width=\"380\"><strong>\u6d4f\u89c8\u5668 <span class=\"version\" style=\"font-size:12px; font-weight:normal; color:#999;\">(\u7279\u5b9a\u6d4b\u8bd5\u7248\u672c)<\/span><\/strong><\/th>\n<th><strong>\u6e10\u8fdbjpeg\u524d\u666f\u6e32\u67d3<\/strong><\/th>\n<th><strong>\u6e10\u8fdbjpeg\u80cc\u666f\u6e32\u67d3<\/strong><\/th>\n<\/tr>\n<tr>\n<td>Chrome <span class=\"version\">(v 25.0.1323.1 dev Mac, 23.0.1271.97 m Win)<\/span><\/td>\n<td class=\"positiveCell\">\u6e10\u8fdb\u5730 (\u76f8\u5f53\u5feb\uff01)<\/td>\n<td class=\"positiveCell\">\u6e10\u8fdb\u5730 (\u76f8\u5f53\u5feb\uff01)<\/td>\n<\/tr>\n<tr>\n<td>Firefox <span class=\"version\">(v 15.0.1 Mac, 12.0 Win)<\/span><\/td>\n<td class=\"positiveCell\">\u6e10\u8fdb\u5730 (\u76f8\u5f53\u5feb\uff01)<\/td>\n<td class=\"negativeCell\">\u6587\u4ef6\u4e0b\u8f7d\u540e\u7acb\u5373\u5730(\u6162)<\/td>\n<\/tr>\n<tr>\n<td>Internet Explorer 8<\/td>\n<td class=\"negativeCell\">\u6587\u4ef6\u4e0b\u8f7d\u540e\u7acb\u5373\u5730(\u6162)<\/td>\n<td class=\"negativeCell\">\u6587\u4ef6\u4e0b\u8f7d\u540e\u7acb\u5373\u5730(\u6162)<\/td>\n<\/tr>\n<tr>\n<td>Internet Explorer 9<\/td>\n<td class=\"positiveCell\">\u6e10\u8fdb\u5730 (\u76f8\u5f53\u5feb\uff01)<\/td>\n<td class=\"negativeCell\">\u6587\u4ef6\u4e0b\u8f7d\u540e\u7acb\u5373\u5730(\u6162)<\/td>\n<\/tr>\n<tr>\n<td>Safari <span class=\"version\">(v 6.0 Desktop, v 6.0 Mobile)<\/span><\/td>\n<td class=\"negativeCell\">\u6587\u4ef6\u4e0b\u8f7d\u540e\u7acb\u5373\u5730(\u6162)<\/td>\n<td class=\"negativeCell\">\u6587\u4ef6\u4e0b\u8f7d\u540e\u7acb\u5373\u5730(\u6162)<\/td>\n<\/tr>\n<tr>\n<td>Opera <span class=\"version\">(v 11.60)<\/span><\/td>\n<td class=\"negativeCell\">\u6587\u4ef6\u4e0b\u8f7d\u540e\u7acb\u5373\u5730(\u6162)<\/td>\n<td class=\"negativeCell\">\u6587\u4ef6\u4e0b\u8f7d\u540e\u7acb\u5373\u5730(\u6162)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u7ed3\u8bba\u5f88\u7b80\u5355\uff0cChrome + Firefox + IE9\u6d4f\u89c8\u5668\u4e0b\uff0c\u6e10\u8fdb\u5f0f\u56fe\u7247\u52a0\u8f7d\u66f4\u5feb\uff0c\u800c\u4e14\u662f\u5feb\u5f88\u591a\uff0c\u81f3\u4e8e\u5176\u4ed6\u6d4f\u89c8\u5668\uff0c\u4e0e\u57fa\u672c\u5f0f\u56fe\u7247\u7684\u52a0\u8f7d\u4e00\u81f4\uff0c\u81f3\u5c11\u4e0d\u4f1a\u62d6\u540e\u817f\u3002<\/p>\n<p><a href=\"http:\/\/www.webmonkey.com\/author\/luxagraf\/\">Scott Gilbertson<\/a>\u5bf9\u6e10\u8fdb\u5f0f\u56fe\u7247\u6709\u5176\u4ed6\u7684\u8865\u5145\uff1a<br \/>\n1. \u4f60<del datetime=\"2013-01-16T01:10:41+00:00\">\u7528<\/del>\u6c38\u4e0d\u77e5\u9053\u57fa\u672c\u5f0f\u56fe\u7247\u5185\u5bb9\uff0c\u9664\u975e\u4ed6\u5b8c\u5168\u52a0\u8f7d\u51fa\u6765\uff1b<br \/>\n2. \u6e10\u8fdb\u5f0f\u56fe\u7247\u4e00\u5f00\u59cb\u5927\u5c0f\u6846\u67b6\u5c31\u5b9a\u597d\uff0c\u4e0d\u4f1a\u50cf\u57fa\u672c\u5f0f\u56fe\u7247\u4e00\u6837\uff0c\u7531\u4e8e\u5c3a\u5bf8\u672a\u8bbe\u5b9a\u800c\u9020\u6210\u56de\u6d41\u2014\u2014\u63d0\u9ad8\u7684\u6e32\u67d3\u6027\u80fd\uff1b<br \/>\n3. \u6e10\u8fdb\u5f0f\u56fe\u7247\u4e5f\u6709\u4e0d\u8db3\uff0c\u5c31\u662f\u5403CPU\u5403\u5185\u5b58\u3002<\/p>\n<p>\u5185\u5bb9\u5c31\u662f\u8fd9\u4e9b\uff0c\u6743\u8861\u4f7f\u7528\u5728\u4f60\u624b\u3002\u4e00\u822c\u800c\u8a00\uff0c\u5927\u5c3a\u5bf8\u56fe\u7247\u5efa\u8bae\u4f7f\u7528\u6e10\u8fdb\u5f0fJPEG.<\/p>\n<p><span class=\"s\">\/\/zxx: png\u56fe\u7247\u4e5f\u662f\u53ef\u4ee5\u6e10\u8fdb\u5f0f\u5448\u73b0\u7684<\/span><\/p>\n<h3>\u4e8c\u3001\u6e10\u8fdb\u5f0fJPEG\u521b\u5efa<\/h3>\n<p><strong>1. C#\u8f6c\u6362<\/strong><br \/>\n\u636e\u8bf4\u662f\u5982\u4e0b\u7684\u4ee3\u7801\uff1a<\/p>\n<div class=\"zxx_code\">\n<pre class=\"default prettyprint prettyprinted\" style=\"\"><code><span class=\"kwd\">using<\/span><span class=\"pln\"> <\/span><span class=\"pun\">(<\/span><span class=\"typ\">Image<\/span><span class=\"pln\"> source <\/span><span class=\"pun\">=<\/span><span class=\"pln\"> <\/span><span class=\"typ\">Image<\/span><span class=\"pun\">.<\/span><span class=\"typ\">FromFile<\/span><span class=\"pun\">(@<\/span><span class=\"str\">\"D:\\temp\\test2.jpg\"<\/span><span class=\"pun\">))<\/span><span class=\"pln\"> <\/span><span class=\"pun\">{<\/span><span class=\"pln\">\n\n  <\/span><span class=\"typ\">ImageCodecInfo<\/span><span class=\"pln\"> codec <\/span><span class=\"pun\">=<\/span><span class=\"pln\"> <\/span><span class=\"typ\">ImageCodecInfo<\/span><span class=\"pun\">.<\/span><span class=\"typ\">GetImageEncoders<\/span><span class=\"pun\">().<\/span><span class=\"typ\">First<\/span><span class=\"pun\">(<\/span><span class=\"pln\">c <\/span><span class=\"pun\">=&gt;<\/span><span class=\"pln\"> c<\/span><span class=\"pun\">.<\/span><span class=\"typ\">MimeType<\/span><span class=\"pln\"> <\/span><span class=\"pun\">==<\/span><span class=\"pln\"> <\/span><span class=\"str\">\"image\/jpeg\"<\/span><span class=\"pun\">);<\/span><span class=\"pln\">\n\n  <\/span><span class=\"typ\">EncoderParameters<\/span><span class=\"pln\"> parameters <\/span><span class=\"pun\">=<\/span><span class=\"pln\"> <\/span><span class=\"kwd\">new<\/span><span class=\"pln\"> <\/span><span class=\"typ\">EncoderParameters<\/span><span class=\"pun\">(<\/span><span class=\"lit\">3<\/span><span class=\"pun\">);<\/span><span class=\"pln\">\n  parameters<\/span><span class=\"pun\">.<\/span><span class=\"typ\">Param<\/span><span class=\"pun\">[<\/span><span class=\"lit\">0<\/span><span class=\"pun\">]<\/span><span class=\"pln\"> <\/span><span class=\"pun\">=<\/span><span class=\"pln\"> <\/span><span class=\"kwd\">new<\/span><span class=\"pln\"> <\/span><span class=\"typ\">EncoderParameter<\/span><span class=\"pun\">(<\/span><span class=\"typ\">System<\/span><span class=\"pun\">.<\/span><span class=\"typ\">Drawing<\/span><span class=\"pun\">.<\/span><span class=\"typ\">Imaging<\/span><span class=\"pun\">.<\/span><span class=\"typ\">Encoder<\/span><span class=\"pun\">.<\/span><span class=\"typ\">Quality<\/span><span class=\"pun\">,<\/span><span class=\"pln\"> <\/span><span class=\"lit\">100L<\/span><span class=\"pun\">);<\/span><span class=\"pln\">\n  parameters<\/span><span class=\"pun\">.<\/span><span class=\"typ\">Param<\/span><span class=\"pun\">[<\/span><span class=\"lit\">1<\/span><span class=\"pun\">]<\/span><span class=\"pln\"> <\/span><span class=\"pun\">=<\/span><span class=\"pln\"> <\/span><span class=\"kwd\">new<\/span><span class=\"pln\"> <\/span><span class=\"typ\">EncoderParameter<\/span><span class=\"pun\">(<\/span><span class=\"typ\">System<\/span><span class=\"pun\">.<\/span><span class=\"typ\">Drawing<\/span><span class=\"pun\">.<\/span><span class=\"typ\">Imaging<\/span><span class=\"pun\">.<\/span><span class=\"typ\">Encoder<\/span><span class=\"pun\">.<\/span><span class=\"typ\">ScanMethod<\/span><span class=\"pun\">,<\/span><span class=\"pln\"> <\/span><span class=\"pun\">(<\/span><span class=\"kwd\">int<\/span><span class=\"pun\">)<\/span><span class=\"typ\">EncoderValue<\/span><span class=\"pun\">.<\/span><span class=\"typ\">ScanMethodInterlaced<\/span><span class=\"pun\">);<\/span><span class=\"pln\">\n  parameters<\/span><span class=\"pun\">.<\/span><span class=\"typ\">Param<\/span><span class=\"pun\">[<\/span><span class=\"lit\">2<\/span><span class=\"pun\">]<\/span><span class=\"pln\"> <\/span><span class=\"pun\">=<\/span><span class=\"pln\"> <\/span><span class=\"kwd\">new<\/span><span class=\"pln\"> <\/span><span class=\"typ\">EncoderParameter<\/span><span class=\"pun\">(<\/span><span class=\"typ\">System<\/span><span class=\"pun\">.<\/span><span class=\"typ\">Drawing<\/span><span class=\"pun\">.<\/span><span class=\"typ\">Imaging<\/span><span class=\"pun\">.<\/span><span class=\"typ\">Encoder<\/span><span class=\"pun\">.<\/span><span class=\"typ\">RenderMethod<\/span><span class=\"pun\">,<\/span><span class=\"pln\"> <\/span><span class=\"pun\">(<\/span><span class=\"kwd\">int<\/span><span class=\"pun\">)<\/span><span class=\"typ\">EncoderValue<\/span><span class=\"pun\">.<\/span><span class=\"typ\">RenderProgressive<\/span><span class=\"pun\">);<\/span><span class=\"pln\">\n\n  source<\/span><span class=\"pun\">.<\/span><span class=\"typ\">Save<\/span><span class=\"pun\">(@<\/span><span class=\"str\">\"D:\\temp\\saved.jpg\"<\/span><span class=\"pun\">,<\/span><span class=\"pln\"> codec<\/span><span class=\"pun\">,<\/span><span class=\"pln\"> parameters<\/span><span class=\"pun\">);<\/span><span class=\"pln\">\n<\/span><span class=\"pun\">}<\/span><\/code><\/pre>\n<\/div>\n<p>\u81f3\u4e8e\u91cc\u9762\u4ec0\u4e48\u610f\u601d\uff0c\u6211\u4e5f\u4e0d\u77e5\u9053\uff0c\u6211\u662fCOPY\u8fc7\u6765\u6ef4\uff0c<img decoding=\"async\" src=\"http:\/\/mat1.gtimg.com\/www\/mb\/images\/face\/6.gif\" \/><\/p>\n<p>\u5176\u4ed6\u8bed\u8a00\u7684\u8f6c\u6362\u81ea\u5df1\u53bb\u641c\u5427\u3002<\/p>\n<p><strong>2. photoshop\u751f\u6210<\/strong><br \/>\n\u5927\u4f19\u90fd\u77e5\u9053photoshop\u4e2d\u6709\u4e2a\u201c\u5b58\u50a8\u4e3aweb\u6240\u7528\u683c\u5f0f\u201d\uff0c\u7136\u540e\uff0c\u5176\u4e2d\uff08\u89c1\u4e0b\u56fe\uff09\uff0c\u90a3\u4e2a\u8fde\u7eed\u52fe\u9009\u5c31\u662f\u6e10\u8fdb\u5f0fJPEG\u56fe\u7247\u4e86\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"photoshop\u751f\u6210\u6e10\u8fdb\u5f0fJPEG\u56fe\u7247 \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201301\/2013-01-07_181001.png\" title=\"photoshop\u751f\u6210\u6e10\u8fdb\u5f0fJPEG\u56fe\u7247\" class=\"alignnone\" width=\"343\" height=\"172\" \/><\/p>\n<p>\u636e\u8bf4\uff0c\u9700\u8981\u52fe\u9009\u90a3\u4e2a\u8f6c\u6362\u4e3asRGB\u9009\u9879\uff0c\u5728\u67d0\u4e9b\u6d4f\u89c8\u5668\u4e0b\uff0c\u56fe\u50cf\u8bbe\u7f6e\u4e3aCMYK\u4f1a\u51fa\u73b0\u4e00\u4e9b\u95ee\u9898\uff01<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\u52fe\u9009\u8f6c\u6362\u4e3asRGB \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201301\/2013-01-07_181533.png\" title=\"\u52fe\u9009\u8f6c\u6362\u4e3asRGB\" class=\"alignnone\" width=\"257\" height=\"141\" \/><\/p>\n<p>FireWorks\u7b49\u56fe\u50cf\u8f6f\u4ef6\u4e5f\u662f\u6709\u7c7b\u4f3c\u7684\u8f93\u51fa\u8bbe\u7f6e\u7684\uff0c\u56e0\u4e3a\u5076\u6ca1\u6709\u5b89\u88c5\uff0c\u65e0\u6cd5\u5c55\u793a\uff0c\u81ea\u5df1\u6478\u7d22\u5427~<\/p>\n<p><strong>\u53c2\u8003\u6587\u7ae0\uff1a<\/strong><\/p>\n<ul>\n<li><a href=\"http:\/\/baike.baidu.com\/view\/7679.htm\">JPEG\u767e\u5ea6\u767e\u79d1<\/a><\/li>\n<li><a href=\"http:\/\/calendar.perfplanet.com\/2012\/progressive-jpegs-a-new-best-practice\/\">Progressive jpegs: a new best practice<\/a><\/li>\n<li><a href=\"http:\/\/peteschuster.com\/2013\/01\/saving-jpegs-for-the-web-setting-photoshop-up-for-progressive-jpegs\/\">Saving JPEGs for the Web: Setting Photoshop Up for Progressive JPEGs<\/a><\/li>\n<li><a href=\"http:\/\/forums.asp.net\/t\/1563626.aspx\/1\">How to make Progressive (interlaced) JPEG ??? <\/a><\/li>\n<li><a href=\"http:\/\/www.webmonkey.com\/2013\/01\/the-return-of-the-progressive-jpeg\/\">The Return of the Progressive JPEG<\/a><\/li>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/2267717\/save-jpg-in-progressive-format\">Save JPG in progressive format<\/a><\/li>\n<\/ul>\n<p>\u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u8f6c\u8f7d\u8bf7\u6ce8\u660e\u6765\u81ea<a href=\"http:\/\/www.zhangxinxu.com\/\">\u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b<\/a>[<a href=\"http:\/\/www.zhangxinxu.com\/\">http:\/\/www.zhangxinxu.com<\/a>]<br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"http:\/\/www.zhangxinxu.com\/wordpress\/?p=2916\">http:\/\/www.zhangxinxu.com\/wordpress\/?p=2916<\/a><\/p>\n<p>\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7f51\u7edc\u4e0a\u90a3\u4e9b\u8272\u8272\u7684\u7167\u7247\u90fd\u662f.jpg\u683c\u5f0f\u7684\uff08\u201c\u8272\u8272\u201d\u6307\u7684\u662f\u8272\u5f69\u6591\u6593\u7684\u610f\u601d\uff09\u3002<br \/>\n\u4e0d\u77e5\u8bf8\u4f4d\u6709\u6ca1\u6709\u6ce8\u610f\u5230\uff0c\u8fd9\u4e9bjpg\u683c\u5f0f\u7684\u56fe\u7247\u5728\u5448\u73b0\u7684\u65f6\u5019\uff0c\u6709\u4e24\u79cd\u65b9\u5f0f\uff0c\u4e00\u79cd\u662f\u81ea\u4e0a\u800c\u4e0b\u626b\u63cf\u5f0f\u7684\uff0c\u8fd8\u6709\u4e00\u79cd\u5c31\u662f\u5148\u662f\u5168\u90e8\u7684\u6a21\u7cca\u56fe\u7247\uff0c\u7136\u540e\u9010\u6e10\u6e05\u6670(\u5c31\u50cfGIF\u683c\u5f0f\u7684\u4ea4\u9519\u663e\u793a)\uff0c\u4f8b\u5982\u4e0b\u9762\u7684\u793a\u610f\u2026\u2026<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[168,771,171,10,200,75,381],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/2916"}],"collection":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/comments?post=2916"}],"version-history":[{"count":0,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/2916\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=2916"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=2916"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=2916"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}