{"id":2107,"date":"2026-10-27T11:19:40","date_gmt":"2026-10-27T10:19:40","guid":{"rendered":"https:\/\/au.feri.um.si\/losdv\/projekti\/pegasti-sum-sar\/"},"modified":"2026-10-28T09:38:27","modified_gmt":"2026-10-28T08:38:27","slug":"pegasti-sum-sar","status":"publish","type":"page","link":"https:\/\/au.feri.um.si\/losdv\/projekti\/pegasti-sum-sar\/","title":{"rendered":"Odstranjevanje pegastega \u0161uma iz slik SAR"},"content":{"rendered":"\n<section class=\"wp-block-group alignfull au-section au-section--dark au-projhero is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group au-container is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"au-back wp-block-paragraph\"><a href=\"\/losdv\/#iz-nasega-dela\">\u2190 Projekti in zaklju\u010dna dela<\/a><\/p>\n\n\n<p class=\"au-eyebrow wp-block-paragraph\">01.7 \u00b7 Magistrsko delo<\/p>\n\n\n<h1 class=\"wp-block-heading\">Odstranjevanje pegastega \u0161uma iz slik SAR<\/h1>\n\n\n<p class=\"au-lead wp-block-paragraph\">Globoka nevronska mre\u017ea iz radarske slike odstrani zrnat pegasti \u0161um, robovi in podrobnosti pa ostanejo.<\/p>\n\n\n<div class=\"anim-box wide\">\n      <canvas id=\"anim\" aria-label=\"Drsnik nad posnetkom Sentinel-1 okolice Maribora: levo od drsnika en sam posnetek s pegastim \u0161umom, desno povpre\u010dje ve\u010d kot 400 posnetkov istega obmo\u010dja. Desna polovica prikazuje pribli\u017ean izsek, ozna\u010den z rde\u010dim kvadratom.\"><\/canvas>\n      <div class=\"anim-cap mono\"><span>Sentinel-1 \u00b7 Maribor \u00b7 en posnetek s \u0161umom \u2194 povpre\u010dje ve\u010d kot 400 posnetkov \u00b7 desno pribli\u017ean izsek<\/span><button class=\"anim-toggle\" type=\"button\">Ustavi<\/button><\/div>\n    <\/div>\n<\/div>\n<\/section>\n\n\n\n<section class=\"wp-block-group alignfull au-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group au-container is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-columns au-projbody is-layout-flex wp-container-core-columns-is-layout-89c98654 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<h2 class=\"wp-block-heading\">O projektu<\/h2>\n\n\n<p class=\"wp-block-paragraph\">Radarske slike SAR prekriva zrnat pegasti \u0161um, ki ote\u017euje njihovo razlago. Z globokimi nevronskimi mre\u017eami ga odstranimo, robovi in podrobnosti pa ostanejo \u2013 osnova za natan\u010dnej\u0161o analizo slik.<\/p>\n\n\n<p class=\"wp-block-paragraph\">Pegasti \u0161um (angl. <em>speckle<\/em>) ni napaka senzorja, temve\u010d posledica koherentnega slikanja: odboji \u0161tevilnih drobnih sipalcev znotraj ene celice lo\u010dljivosti se se\u0161tevajo z razli\u010dnimi fazami. Klasi\u010dni filtri \u0161um sicer zmanj\u0161ajo, a hkrati zabri\u0161ejo robove. Nevronska mre\u017ea se nau\u010di lo\u010diti \u0161um od strukture v sliki.<\/p>\n\n\n<p class=\"wp-block-paragraph\">Za u\u010denje potrebuje mre\u017ea pare slik: posnetek s \u0161umom in \u010disto referen\u010dno sliko istega obmo\u010dja. V magistrskem delu je uporabljen ve\u010d\u010dasovni pristop \u2013 referen\u010dna slika okolice Maribora je povpre\u010dje ve\u010d kot 400 posnetkov satelita Sentinel-1. S povpre\u010denjem se pegasti \u0161um, ki je od posnetka do posnetka naklju\u010den, izni\u010di, struktura terena pa ostane.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Kako deluje<\/h2>\n\n\n<ol class=\"wp-block-list au-steps\">\n<li><strong>Priprava podatkov<\/strong>: posnetke Sentinel-1 iste lokacije obdelamo, poravnamo in popravimo za teren.<\/li>\n\n\n<li><strong>Referen\u010dna slika<\/strong> nastane s povpre\u010denjem ve\u010d kot 400 poravnanih posnetkov.<\/li>\n\n\n<li><strong>Konvolucijska mre\u017ea<\/strong> s kodirnikom in dekodirnikom ter modulom neprekinjene pozornosti (CAM) se nau\u010di preslikave iz posnetka s \u0161umom v referen\u010dno sliko.<\/li>\n\n\n<li><strong>Primerjava<\/strong> z osmimi klasi\u010dnimi filtri (Boxcar, Median, Frost, Gamma MAP, Lee, Refined Lee, Lee Sigma, IDAN) po merilih PSNR in SSIM \u2013 globoko u\u010denje je doseglo najbolj\u0161e rezultate.<\/li>\n<\/ol>\n<\/div>\n\n\n<div class=\"wp-block-column au-facts is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:40%\">\n<figure class=\"wp-block-table au-facts__table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Vrsta<\/td><td>Magistrsko delo<\/td><\/tr><tr><td>Avtor<\/td><td>Tadej Habjani\u010d<\/td><\/tr><tr><td>Mentor<\/td><td>Du\u0161an Gleich<\/td><\/tr><tr><td>Podro\u010dje<\/td><td>Daljinsko zaznavanje \u00b7 Obdelava radarskih signalov<\/td><\/tr><tr><td>Podatki<\/td><td>Sentinel-1, okolica Maribora<\/td><\/tr><tr><td>Referenca<\/td><td>Povpre\u010dje ve\u010d kot 400 posnetkov<\/td><\/tr><tr><td>Metoda<\/td><td>CNN s kodirnikom in dekodirnikom ter modulom pozornosti CAM<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6aef84d237234&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6aef84d237234\" class=\"wp-block-image size-full wp-lightbox-container\"><img decoding=\"async\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"\/losdv\/wp-content\/uploads\/sites\/4\/2026\/10\/s1-maribor-povprecje-kvadrat.jpg\" alt=\"Povpre\u010dje ve\u010d kot 400 posnetkov Sentinel-1 okolice Maribora\"\/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n\n\n<p class=\"au-textlink wp-block-paragraph\"><a href=\"https:\/\/dk.um.si\/IzpisGradiva.php?id=86581\" target=\"_blank\" rel=\"noreferrer noopener\">Preberi delo v DKUM \u2197<\/a><\/p>\n<\/div>\n<\/div>\n\n\n<div class=\"wp-block-group au-projsec is-layout-flow wp-block-group-is-layout-flow\">\n<h2 class=\"wp-block-heading\">Pribli\u017ean izsek: \u0161um, globoko u\u010denje in referenca<\/h2>\n\n\n<div class=\"wp-block-group au-zoomrow is-layout-flow wp-block-group-is-layout-flow\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6aef84d23775a&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6aef84d23775a\" class=\"wp-block-image size-full wp-lightbox-container\"><img decoding=\"async\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"\/losdv\/wp-content\/uploads\/sites\/4\/2026\/10\/s1-izsek-sum.jpg\" alt=\"Izsek posnetka Sentinel-1 s pegastim \u0161umom\"\/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><figcaption class=\"wp-element-caption\">En posnetek s \u0161umom<\/figcaption><\/figure>\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6aef84d2379bd&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6aef84d2379bd\" class=\"wp-block-image size-full wp-lightbox-container\"><img decoding=\"async\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"\/losdv\/wp-content\/uploads\/sites\/4\/2026\/10\/s1-izsek-globoko.jpg\" alt=\"Isti izsek po odstranjevanju \u0161uma z globokim u\u010denjem\"\/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><figcaption class=\"wp-element-caption\">Globoko u\u010denje<\/figcaption><\/figure>\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6aef84d237c07&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6aef84d237c07\" class=\"wp-block-image size-full wp-lightbox-container\"><img decoding=\"async\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"\/losdv\/wp-content\/uploads\/sites\/4\/2026\/10\/s1-izsek-povprecje.jpg\" alt=\"Isti izsek na povpre\u010dju ve\u010d kot 400 posnetkov\"\/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><figcaption class=\"wp-element-caption\">Povpre\u010dje 400+ posnetkov<\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"au-media-cap wp-block-paragraph\">Obmo\u010dje, ozna\u010deno z rde\u010dim kvadratom na posnetku zgoraj. Slike: T. Habjani\u010d, <em>Odstranjevanje pegastega \u0161uma iz slik SAR z uporabo globokega u\u010denja<\/em>, magistrsko delo, UM FERI.<\/p>\n<\/div>\n\n\n<div class=\"wp-block-group au-projnav is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><a href=\"\/losdv\/projekti\/kontrola-napisa-bosch\/\"><span>\u2190 Prej\u0161nji<\/span>Kontrola napisa Bosch s kamero<\/a><\/p>\n\n\n<p class=\"wp-block-paragraph\"><a href=\"\/losdv\/projekti\/dvokolesni-robot\/\"><span>Naslednji \u2192<\/span>Agilni dvokolesni robot<\/a><\/p>\n<\/div>\n<\/div>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>\u2190 Projekti in zaklju\u010dna dela 01.7 \u00b7 Magistrsko delo Odstranjevanje pegastega \u0161uma iz slik SAR Globoka nevronska mre\u017ea iz radarske slike odstrani zrnat pegasti \u0161um, robovi in podrobnosti pa ostanejo. Sentinel-1 \u00b7 Maribor \u00b7 en posnetek s \u0161umom \u2194 povpre\u010dje ve\u010d kot 400 posnetkov \u00b7 desno pribli\u017ean izsekUstavi O projektu Radarske slike SAR prekriva zrnat [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2098,"menu_order":7,"comment_status":"closed","ping_status":"closed","template":"page-brez-naslova","meta":{"footnotes":""},"class_list":["post-2107","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/pages\/2107","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/comments?post=2107"}],"version-history":[{"count":2,"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/pages\/2107\/revisions"}],"predecessor-version":[{"id":2130,"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/pages\/2107\/revisions\/2130"}],"up":[{"embeddable":true,"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/pages\/2098"}],"wp:attachment":[{"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/media?parent=2107"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}