{"id":6196,"date":"2022-04-25T15:21:26","date_gmt":"2022-04-25T15:21:26","guid":{"rendered":"https:\/\/www.enago.cn\/academychina\/?p=6196"},"modified":"2022-04-25T15:29:04","modified_gmt":"2022-04-25T15:29:04","slug":"image-trick-in-matlab","status":"publish","type":"post","link":"https:\/\/www.enago.cn\/academychina\/image-trick-in-matlab\/","title":{"rendered":"\u505a\u597d\u770b\u7684\u56fe\u7247 \u2014\u2014\u52a0\u7c97\u56fe\u7247\u4e2d\u7684\u6240\u6709\u7ebf\u6761"},"content":{"rendered":"<div style=\"margin-top: 0px; margin-bottom: 0px;\" class=\"sharethis-inline-share-buttons\" ><\/div><p>\u6709\u6ca1\u6709\u9047\u5230\u8fc7\u8fd9\u79cd\u4e8b\u60c5\uff1a\u5199\u4e86\u4e00\u7bc7\u6587\u7ae0\uff0c\u8fd8\u753b\u4e86\u4e00\u4e2a\u81ea\u5df1\u89c9\u5f97\u8fd8\u4e0d\u9519\u7684\u7cfb\u7edf\u793a\u610f\u56fe\uff0c\u5f88\u9ad8\u5174\u7684\u7ed9\u8001\u677f\u770b\u3002\u8001\u677f\u770b\u4e86\uff0c\u5148\u662f\u8868\u626c\u4e86\u4f60\u4e00\u4e0b\uff0c\u7136\u540e\u5f00\u59cb\u8bf4\u610f\u89c1\u4e86\uff1a\u201c\u8fd9\u4e2a\u56fe\u7684\u7ebf\u6761\u6709\u70b9\u592a\u7ec6\u4e86\uff0c\u7c97\u70b9\u4f1a\u597d\u770b\u4e00\u4e9b\u3002\u90a3\u4e2a\u5730\u65b9\u5f04\u4e00\u4e2a\u5012\u89d2\uff0c\u6bd4\u76f4\u89d2\u597d\u770b\u4e00\u4e9b\u3002\u201d\u8bf8\u5982\u7b49\u7b49\u3002\u5bf9\u4f60\u6765\u8bf4\u8fd8\u6709\u5565\u9009\u62e9\uff0c\u56de\u53bb\u6539\u5457\u3002<\/p>\n<p>\u5176\u4ed6\u7684\u95ee\u9898\u597d\u50cf\u90fd\u8fd8\u597d\u5f04\u3002\u5c31\u662f\u628a\u6240\u6709\u7ebf\u6761\u53d8\u7c97\u6bd4\u8f83\u9ebb\u70e6\u3002\u5982\u679c\u56fe\u662fPPT\u505a\u7684\uff0c\u6ca1\u6cd5\u5168\u9009\u6240\u6709\u7ebf\u6761\u7136\u540e\u4fee\u6539\u7ebf\u5bbd\uff0c\u518d\u8bf4\u5373\u4f7f\u80fd\uff0c\u4e5f\u53ea\u80fd\u53d8\u6210\u4e00\u6837\u5bbd\u3002\u8fd8\u6709\u4e00\u4e9b\u56fe\u662f\u4eceAutoCAD\u91cc\u9762\u5bfc\u51fa\u6765\u7684\uff0c\u4e5f\u53ea\u80fd\u4e00\u6761\u4e00\u6761\u6765\u8bbe\u7f6e\u3002\u5f53\u7136\u89e3\u51b3\u65b9\u6cd5\u662f\u6709\u7684\uff0c\u53cd\u6b63\u6709\u7684\u662f\u65f6\u95f4\uff0c\u90a3\u5c31\u4e00\u6761\u4e00\u6761\u8bbe\u7f6e\u5457\uff0c\u53cd\u6b63\u6700\u591a\u4e00\u4e2a\u5c0f\u65f6\u3002\u8fd8\u6709\u66f4\u90c1\u95f7\u7684\u65f6\u5019\uff0c\u539f\u6587\u4ef6\u90fd\u5df2\u7ecf\u627e\u4e0d\u5230\u4e86\uff0c\u53ea\u5269\u4e0b\u6700\u540e\u7684\u6548\u679c\u56fe\u4e86\u3002\u8981\u4fee\u6539\u7684\u8bdd\u5c31\u8981\u91cd\u505a\u4e00\u904d\u4e86\u3002\u53ef\u662f\u5047\u8bbe\u8001\u677f\u8fd8\u662f\u4e0d\u6ee1\u610f\u5462\uff1f\u5bf9\u4ed6\u6765\u8bf4\u53ea\u662f\u4e00\u53e5\u8bdd\uff0c\u53ef\u662f\u6bcf\u4e00\u53e5\u8bdd\u5c31\u8d39\u4e86\u4f60\u5b9d\u8d35\u7684\u4e00\u4e2a\u5c0f\u65f6\u559d\u5496\u5561\u7684\u65f6\u95f4\u3002\u4e5f\u8bb8\u8fd8\u6709\u9ad8\u7aef\u7684\u505a\u6cd5\u5427\uff0c\u6bd4\u5982Photoshop\uff0c\u5148\u81a8\u80c0\u7136\u540e\u518d\u589e\u52a0\u5bf9\u6bd4\u5ea6\u7b49\u7b49\u3002\u4e0d\u8fc7\u53cd\u6b63\u6211\u662f\u5bf9Photoshop\u90a3\u4e48\u591a\u641e\u4e0d\u6e05\u695a\u529f\u80fd\u7684\u6309\u94ae\u5f88\u6050\u60e7\u3002<\/p>\n<p>\u5982\u679c\u7528MATLAB\u7684\u8bdd\uff0c\u89e3\u51b3\u8d77\u6765\u8fd8\u662f\u6bd4\u8f83\u5bb9\u6613\u7684\uff0c\u4ee3\u7801\u4e5f\u4e0d\u590d\u6742\u3002\u4e3a\u4e86\u628a\u4e8b\u60c5\u8bf4\u7684\u66f4\u6e05\u695a\u4e00\u4e9b\uff0c\u4ee3\u7801\u518d\u52a0\u70b9\u6ce8\u91ca\u3002<\/p>\n<p>clear all;<\/p>\n<p>clc;<\/p>\n<p>inputfile = \u2018Fig1.bmp\u2019; % \u8f93\u5165\u7684\u56fe\u50cf\u6587\u4ef6\u540d\uff0cMATLAB\u652f\u6301\u7684\u6587\u4ef6\u683c\u5f0f\u8fd8\u662f\u6bd4\u8f83\u591a\u7684\uff0c\u6240\u4ee5\u4e0d\u7528\u62c5\u5fc3<\/p>\n<p>outputfile = \u2018Fig1_2\u2019; % \u8f93\u51fa\u7684\u6587\u4ef6\u540d\uff0c\u53ef\u4ee5\u4e0d\u52a0\u540e\u7f00<\/p>\n<p>outputfileformat = \u2018png\u2019; % \u8f93\u51fa\u7684\u6587\u4ef6\u683c\u5f0f\u3002\u5305\u542b\u4e86\u5f88\u591a\u5e38\u7528\u7684\u683c\u5f0f\uff1a\u6bd4\u5982\u2019bmp\u2019,\u2019gif\u2019, \u2018jpg\u2019, \u2018png\u2019, \u2018tiff\u2019\u7b49\u7b49\u3002<\/p>\n<p>thickness = 2; % \u8bbe\u7f6e\u81a8\u80c0\u7684\u5bbd\u5ea6\uff0c\u8d8a\u5927\u5219\u7ed3\u679c\u8d8a\u7c97<\/p>\n<p>b=imread(inputfile);\u00a0 % \u8bfb\u5165\u56fe\u50cf\u6587\u4ef6<\/p>\n<p>b=im2bw(b);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 % \u5c06\u56fe\u50cf\u8f6c\u6362\u6210\u9ed1\u767d\u4e8c\u503c\u56fe\u50cf<\/p>\n<p>a=~b;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 % \u9ed1\u767d\u4e92\u6362<\/p>\n<p>se = strel(\u2018rectangle\u2019, [thickness thickness]);\u00a0 % \u8bbe\u7f6e\u4e00\u4e2a\u77e9\u5f62\u533a\u95f4<\/p>\n<p>bw2 = ~(imdilate(a,se)); % \u5904\u7406\u56fe\u50cf<\/p>\n<p>imwrite(bw2, [outputfile \u2018.\u2019 outputfileformat],outputfileformat); % \u5c06\u5904\u7406\u597d\u7684\u56fe\u50cf\u5199\u5165\u6587\u4ef6<\/p>\n<p>% \u4ee5\u4e0b\u4e3a\u663e\u793a\u5904\u7406\u524d\u4e0e\u5904\u7406\u540e\u7684\u56fe\u50cf\uff0c\u53ef\u4ee5\u5220\u53bb<\/p>\n<p>figure(\u2018color\u2019,\u2019w\u2019)<\/p>\n<p>subplot(1,2,1)<\/p>\n<p>imshow(b)\uff1b<\/p>\n<p>title(\u2018Before\u2019)<\/p>\n<p>subplot(1,2,2)<\/p>\n<p>imshow(bw2)<\/p>\n<p>title(\u2018after\u2019)\uff1b<\/p>\n<p>\u8fd9\u91cc\u5934\u6700\u91cd\u8981\u7684\u4ee3\u7801\u5176\u5b9e\u5c312\u884c\u3002strel\u662f\u7528\u6765\u8bbe\u7f6e\u4f5c\u7528\u5143\u7d20\u3002\u8fd9\u91cc\u662f\u4f7f\u7528\u4e86\u77e9\u5f62\u7684\u5143\u7d20\uff0c\u56e0\u4e3a\u53ea\u662f\u4e3a\u4e86\u589e\u52a0\u50cf\u7d20\u7684\u5bbd\u5ea6\uff0c\u8fd9\u91cc\u7684\u5bbd\u5ea6\u662f2\uff0c \u5982\u679c\u9700\u8981\u66f4\u7c97\uff0c\u53ea\u9700\u8981\u589e\u52a0\u8fd9\u4e2a\u6570\u5b57\u5c31\u53ef\u4ee5\u4e86\u3002\u5176\u5b9e\u8fd8\u53ef\u4ee5\u5b9a\u4e49\u5f88\u591a\u6837\u5f0f\u7684\uff0c\u6bd4\u5982\u692d\u5706\uff0c\u6216\u8005\u6cbf\u7740\u67d0\u4e2a\u65b9\u5411\u7b49\u3002dilate\u51fd\u6570\u662f\u5bf9\u56fe\u50cf\u505a\u81a8\u80c0\u64cd\u4f5c\uff0c\u7528\u7684\u5143\u7d20\u5c31\u662f\u4e0a\u9762\u7684strel\u51fd\u6570\u8bbe\u7f6e\u7684\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u5bf9\u7167\u7684\u56fe\uff1a\uff08thickness=2\uff09<\/p>\n<p><img class=\"alignnone size-full wp-image-576\" sizes=\"(max-width: 682px) 100vw, 682px\" srcset=\"https:\/\/www.enago.cn\/academy\/wp-content\/uploads\/2014\/05\/img15.jpg 682w, https:\/\/www.enago.cn\/academy\/wp-content\/uploads\/2014\/05\/img15-300x207.jpg 300w, https:\/\/www.enago.cn\/academy\/wp-content\/uploads\/2014\/05\/img15-600x414.jpg 600w, https:\/\/www.enago.cn\/academy\/wp-content\/uploads\/2014\/05\/img15-624x430.jpg 624w\" alt=\"img15\" width=\"682\" height=\"471\" data-src=\"https:\/\/www.enago.cn\/academy\/wp-content\/uploads\/2014\/05\/img15.jpg\" \/><\/p>\n<p>\u4e0d\u8fc7\u5f97\u5148\u8bf4\u4e00\u4e0b\uff0c\u8fd9\u4e2a\u4e0d\u662f\u7ec8\u6781\u89e3\u51b3\u65b9\u6848\u3002\u56e0\u4e3a\u5904\u7406\u7684\u5bf9\u8c61\u662f\u9ed1\u767d\u56fe\u5f62\u3002\u5982\u679c\u662f\u5f69\u8272\u7684\u5462\uff1f\u5443\uff0c\u6211\u4e5f\u8981\u53bb\u60f3\u60f3\uff0c\u7ec8\u5f52\u662f\u6709\u975e\u5e38\u7701\u4e8b\u7684\u89e3\u51b3\u65b9\u6cd5\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6709\u6ca1\u6709\u9047\u5230\u8fc7\u8fd9\u79cd\u4e8b\u60c5\uff1a\u5199\u4e86\u4e00\u7bc7\u6587\u7ae0\uff0c\u8fd8\u753b\u4e86\u4e00\u4e2a\u81ea\u5df1\u89c9\u5f97\u8fd8\u4e0d\u9519\u7684\u7cfb\u7edf\u793a\u610f\u56fe\uff0c\u5f88\u9ad8\u5174\u7684\u7ed9\u8001\u677f\u770b\u3002\u8001\u677f\u770b\u4e86\uff0c\u5148\u662f\u8868\u626c\u4e86\u4f60\u4e00\u4e0b\uff0c\u7136\u540e\u5f00\u59cb\u8bf4\u610f\u89c1\u4e86\uff1a\u201c\u8fd9\u4e2a\u56fe\u7684\u7ebf\u6761\u6709\u70b9\u592a\u7ec6\u4e86\uff0c\u7c97\u70b9\u4f1a\u597d\u770b\u4e00\u4e9b\u3002\u90a3\u4e2a\u5730\u65b9\u5f04\u4e00\u4e2a\u5012\u89d2\uff0c\u6bd4\u76f4\u89d2\u597d\u770b\u4e00\u4e9b\u3002\u201d\u8bf8\u5982\u7b49\u7b49\u3002\u5bf9\u4f60\u6765\u8bf4\u8fd8\u6709\u5565\u9009\u62e9\uff0c\u56de\u53bb\u6539\u5457\u3002 \u5176\u4ed6\u7684\u95ee\u9898\u597d\u50cf\u90fd\u8fd8\u597d\u5f04\u3002\u5c31\u662f\u628a\u6240\u6709\u7ebf\u6761\u53d8\u7c97\u6bd4\u8f83\u9ebb\u70e6\u3002\u5982\u679c\u56fe\u662fPPT\u505a\u7684\uff0c\u6ca1\u6cd5\u5168\u9009\u6240\u6709\u7ebf\u6761\u7136\u540e\u4fee\u6539\u7ebf\u5bbd\uff0c\u518d\u8bf4\u5373\u4f7f\u80fd\uff0c\u4e5f\u53ea\u80fd\u53d8\u6210\u4e00\u6837\u5bbd\u3002\u8fd8\u6709\u4e00\u4e9b\u56fe\u662f\u4eceAutoCAD\u91cc\u9762\u5bfc\u51fa\u6765\u7684\uff0c\u4e5f\u53ea\u80fd\u4e00\u6761\u4e00\u6761\u6765\u8bbe\u7f6e\u3002\u5f53\u7136\u89e3\u51b3\u65b9\u6cd5\u662f\u6709\u7684\uff0c\u53cd\u6b63\u6709\u7684\u662f\u65f6\u95f4\uff0c\u90a3\u5c31\u4e00\u6761\u4e00\u6761\u8bbe\u7f6e\u5457\uff0c\u53cd\u6b63\u6700\u591a\u4e00\u4e2a\u5c0f\u65f6\u3002\u8fd8\u6709\u66f4\u90c1\u95f7\u7684\u65f6\u5019\uff0c\u539f\u6587\u4ef6\u90fd\u5df2\u7ecf\u627e\u4e0d\u5230\u4e86\uff0c\u53ea\u5269\u4e0b\u6700\u540e\u7684\u6548\u679c\u56fe\u4e86\u3002\u8981\u4fee\u6539\u7684\u8bdd\u5c31\u8981\u91cd\u505a\u4e00\u904d\u4e86\u3002\u53ef\u662f\u5047\u8bbe\u8001\u677f\u8fd8\u662f\u4e0d\u6ee1\u610f\u5462\uff1f\u5bf9\u4ed6\u6765\u8bf4\u53ea\u662f\u4e00\u53e5\u8bdd\uff0c\u53ef\u662f\u6bcf\u4e00\u53e5\u8bdd\u5c31\u8d39\u4e86\u4f60\u5b9d\u8d35\u7684\u4e00\u4e2a\u5c0f\u65f6\u559d\u5496\u5561\u7684\u65f6\u95f4\u3002\u4e5f\u8bb8\u8fd8\u6709\u9ad8\u7aef\u7684\u505a\u6cd5\u5427\uff0c\u6bd4\u5982Photoshop\uff0c\u5148\u81a8\u80c0\u7136\u540e\u518d\u589e\u52a0\u5bf9\u6bd4\u5ea6\u7b49\u7b49\u3002\u4e0d\u8fc7\u53cd\u6b63\u6211\u662f\u5bf9Photoshop\u90a3\u4e48\u591a\u641e\u4e0d\u6e05\u695a\u529f\u80fd\u7684\u6309\u94ae\u5f88\u6050\u60e7\u3002 \u5982\u679c\u7528MATLAB\u7684\u8bdd\uff0c\u89e3\u51b3\u8d77\u6765\u8fd8\u662f\u6bd4\u8f83\u5bb9\u6613\u7684\uff0c\u4ee3\u7801\u4e5f\u4e0d\u590d\u6742\u3002\u4e3a\u4e86\u628a\u4e8b\u60c5\u8bf4\u7684\u66f4\u6e05\u695a\u4e00\u4e9b\uff0c\u4ee3\u7801\u518d\u52a0\u70b9\u6ce8\u91ca\u3002 clear all; clc; inputfile = \u2018Fig1.bmp\u2019; % \u8f93\u5165\u7684\u56fe\u50cf\u6587\u4ef6\u540d\uff0cMATLAB\u652f\u6301\u7684\u6587\u4ef6\u683c\u5f0f\u8fd8\u662f\u6bd4\u8f83\u591a\u7684\uff0c\u6240\u4ee5\u4e0d\u7528\u62c5\u5fc3 outputfile = \u2018Fig1_2\u2019; % \u8f93\u51fa\u7684\u6587\u4ef6\u540d\uff0c\u53ef\u4ee5\u4e0d\u52a0\u540e\u7f00 outputfileformat = \u2018png\u2019; % \u8f93\u51fa\u7684\u6587\u4ef6\u683c\u5f0f\u3002\u5305\u542b\u4e86\u5f88\u591a\u5e38\u7528\u7684\u683c\u5f0f\uff1a\u6bd4\u5982\u2019bmp\u2019,\u2019gif\u2019, \u2018jpg\u2019, \u2018png\u2019, \u2018tiff\u2019\u7b49\u7b49\u3002 thickness = 2; % \u8bbe\u7f6e\u81a8\u80c0\u7684\u5bbd\u5ea6\uff0c\u8d8a\u5927\u5219\u7ed3\u679c\u8d8a\u7c97 b=imread(inputfile);\u00a0 % \u8bfb\u5165\u56fe\u50cf\u6587\u4ef6 b=im2bw(b);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 % \u5c06\u56fe\u50cf\u8f6c\u6362\u6210\u9ed1\u767d\u4e8c\u503c\u56fe\u50cf a=~b;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 % \u9ed1\u767d\u4e92\u6362 se = strel(\u2018rectangle\u2019, [thickness thickness]);\u00a0 % \u8bbe\u7f6e\u4e00\u4e2a\u77e9\u5f62\u533a\u95f4 bw2 = ~(imdilate(a,se)); % \u5904\u7406\u56fe\u50cf imwrite(bw2, [outputfile \u2018.\u2019 outputfileformat],outputfileformat); % [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":6199,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[32],"tags":[65,66],"class_list":["post-6196","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-using-online-media","tag-designing-figures-images","tag-artwork-guidelines"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u505a\u597d\u770b\u7684\u56fe\u7247 \u2014\u2014\u52a0\u7c97\u56fe\u7247\u4e2d\u7684\u6240\u6709\u7ebf\u6761 - \u82f1\u8bba\u9601<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.enago.cn\/academychina\/image-trick-in-matlab\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u505a\u597d\u770b\u7684\u56fe\u7247 \u2014\u2014\u52a0\u7c97\u56fe\u7247\u4e2d\u7684\u6240\u6709\u7ebf\u6761 - \u82f1\u8bba\u9601\" \/>\n<meta property=\"og:description\" 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\u5982\u679c\u7528MATLAB\u7684\u8bdd\uff0c\u89e3\u51b3\u8d77\u6765\u8fd8\u662f\u6bd4\u8f83\u5bb9\u6613\u7684\uff0c\u4ee3\u7801\u4e5f\u4e0d\u590d\u6742\u3002\u4e3a\u4e86\u628a\u4e8b\u60c5\u8bf4\u7684\u66f4\u6e05\u695a\u4e00\u4e9b\uff0c\u4ee3\u7801\u518d\u52a0\u70b9\u6ce8\u91ca\u3002 clear all; clc; inputfile = \u2018Fig1.bmp\u2019; % \u8f93\u5165\u7684\u56fe\u50cf\u6587\u4ef6\u540d\uff0cMATLAB\u652f\u6301\u7684\u6587\u4ef6\u683c\u5f0f\u8fd8\u662f\u6bd4\u8f83\u591a\u7684\uff0c\u6240\u4ee5\u4e0d\u7528\u62c5\u5fc3 outputfile = \u2018Fig1_2\u2019; % \u8f93\u51fa\u7684\u6587\u4ef6\u540d\uff0c\u53ef\u4ee5\u4e0d\u52a0\u540e\u7f00 outputfileformat = \u2018png\u2019; % \u8f93\u51fa\u7684\u6587\u4ef6\u683c\u5f0f\u3002\u5305\u542b\u4e86\u5f88\u591a\u5e38\u7528\u7684\u683c\u5f0f\uff1a\u6bd4\u5982\u2019bmp\u2019,\u2019gif\u2019, \u2018jpg\u2019, \u2018png\u2019, \u2018tiff\u2019\u7b49\u7b49\u3002 thickness = 2; % 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\u5982\u679c\u7528MATLAB\u7684\u8bdd\uff0c\u89e3\u51b3\u8d77\u6765\u8fd8\u662f\u6bd4\u8f83\u5bb9\u6613\u7684\uff0c\u4ee3\u7801\u4e5f\u4e0d\u590d\u6742\u3002\u4e3a\u4e86\u628a\u4e8b\u60c5\u8bf4\u7684\u66f4\u6e05\u695a\u4e00\u4e9b\uff0c\u4ee3\u7801\u518d\u52a0\u70b9\u6ce8\u91ca\u3002 clear all; clc; inputfile = \u2018Fig1.bmp\u2019; % \u8f93\u5165\u7684\u56fe\u50cf\u6587\u4ef6\u540d\uff0cMATLAB\u652f\u6301\u7684\u6587\u4ef6\u683c\u5f0f\u8fd8\u662f\u6bd4\u8f83\u591a\u7684\uff0c\u6240\u4ee5\u4e0d\u7528\u62c5\u5fc3 outputfile = \u2018Fig1_2\u2019; % \u8f93\u51fa\u7684\u6587\u4ef6\u540d\uff0c\u53ef\u4ee5\u4e0d\u52a0\u540e\u7f00 outputfileformat = \u2018png\u2019; % \u8f93\u51fa\u7684\u6587\u4ef6\u683c\u5f0f\u3002\u5305\u542b\u4e86\u5f88\u591a\u5e38\u7528\u7684\u683c\u5f0f\uff1a\u6bd4\u5982\u2019bmp\u2019,\u2019gif\u2019, \u2018jpg\u2019, \u2018png\u2019, \u2018tiff\u2019\u7b49\u7b49\u3002 thickness = 2; % 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