{"id":466,"date":"2025-09-22T22:17:41","date_gmt":"2025-09-22T14:17:41","guid":{"rendered":"https:\/\/www.shirui.me\/blog\/?p=466"},"modified":"2026-02-08T22:44:23","modified_gmt":"2026-02-08T14:44:23","slug":"detecting-spherical-nps-from-tem","status":"publish","type":"post","link":"https:\/\/www.shirui.me\/blog\/2025\/09\/22\/detecting-spherical-nps-from-tem\/","title":{"rendered":"Detecting Spherical NPs from TEM"},"content":{"rendered":"\n<p>I recently read the paper \u201c<a href=\"https:\/\/pubs.acs.org\/doi\/10.1021\/acsnanoscienceau.4c00076\">Practical Guide to Automated TEM Image Analysis for Increased Accuracy and Precision in the Measurement of Particle Size and Morphology<\/a>.\u201d In Figure 8, the spherical nanoparticles appear as faintly overlapping circles,<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"348\" src=\"https:\/\/www.shirui.me\/blog\/wp-content\/uploads\/2025\/09\/images_large_ng4c00076_0008.jpeg\" alt=\"\" class=\"wp-image-524\" srcset=\"https:\/\/www.shirui.me\/blog\/wp-content\/uploads\/2025\/09\/images_large_ng4c00076_0008.jpeg 1000w, https:\/\/www.shirui.me\/blog\/wp-content\/uploads\/2025\/09\/images_large_ng4c00076_0008-300x104.jpeg 300w, https:\/\/www.shirui.me\/blog\/wp-content\/uploads\/2025\/09\/images_large_ng4c00076_0008-768x267.jpeg 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p>which immediately brought to mind the Hough Circle detection algorithm. By voting in the circle parameter space, Hough Circle can pick out weak or partially obscured arcs and thus avoid lumping overlapping particles into a single object.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"424\" height=\"425\" src=\"https:\/\/www.shirui.me\/blog\/wp-content\/uploads\/2025\/11\/6.png\" alt=\"\" class=\"wp-image-484\" srcset=\"https:\/\/www.shirui.me\/blog\/wp-content\/uploads\/2025\/11\/6.png 424w, https:\/\/www.shirui.me\/blog\/wp-content\/uploads\/2025\/11\/6-300x300.png 300w, https:\/\/www.shirui.me\/blog\/wp-content\/uploads\/2025\/11\/6-150x150.png 150w\" sizes=\"auto, (max-width: 424px) 100vw, 424px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>I recently read the paper \u201cPractical Guide to Automated TEM Image Analysis for Increased Accuracy and Precision in the Measurement of Particle Size and Morphology.\u201d In Figure 8, the spherical nanoparticles appear as faintly overlapping circles, which immediately brought to mind the Hough Circle detection algorithm. By voting in the circle parameter space, Hough Circle [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[34],"class_list":["post-466","post","type-post","status-publish","format-standard","hentry","category-notes","tag-tem"],"_links":{"self":[{"href":"https:\/\/www.shirui.me\/blog\/wp-json\/wp\/v2\/posts\/466","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.shirui.me\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.shirui.me\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.shirui.me\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.shirui.me\/blog\/wp-json\/wp\/v2\/comments?post=466"}],"version-history":[{"count":3,"href":"https:\/\/www.shirui.me\/blog\/wp-json\/wp\/v2\/posts\/466\/revisions"}],"predecessor-version":[{"id":525,"href":"https:\/\/www.shirui.me\/blog\/wp-json\/wp\/v2\/posts\/466\/revisions\/525"}],"wp:attachment":[{"href":"https:\/\/www.shirui.me\/blog\/wp-json\/wp\/v2\/media?parent=466"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shirui.me\/blog\/wp-json\/wp\/v2\/categories?post=466"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shirui.me\/blog\/wp-json\/wp\/v2\/tags?post=466"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}