{"id":1207,"date":"2023-01-05T08:57:11","date_gmt":"2023-01-05T07:57:11","guid":{"rendered":"https:\/\/au.feri.um.si\/losdv\/?page_id=1207"},"modified":"2023-01-05T08:57:11","modified_gmt":"2023-01-05T07:57:11","slug":"sar_obdelava_slik","status":"publish","type":"page","link":"https:\/\/au.jovo.cc\/losdv\/sar_obdelava_slik\/","title":{"rendered":"Obdelava slik z umetno odprtino &#8211; SAR"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">V laboratoriju za obdelavo signalov in daljinska vodenja se ukvarjamo z analizo slik radarja z umetno odprtino ali ang. Synthetic Aperture Radar ali na kratko SAR. Radarske slike za svoj nastanek potrebujejo izvor elektromagnetnega valovanja. Slike SAR nastanejo s po\u0161iljanjem frekven\u010dno moduliranega signala od izvora do sprejemnika. Radarske slike uporabljamo za zaznavanje sprememb, avtomatsko izlo\u010danje informacij, dolo\u010danje premikov in zaznavanje vla\u017enosti tal.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-5-1024x422.png\" alt=\"\" class=\"wp-image-1208\" width=\"768\" height=\"317\" srcset=\"https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-5-1024x422.png 1024w, https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-5-300x124.png 300w, https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-5-768x317.png 768w, https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-5.png 1433w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption>Slika 1. Slika Maribora posneta s satelitom TerraSAR-X leta 2015 v RGB predstavitvi<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Zaznavanje sprememb<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S slikami SAR lahko posnamemo stanje pred in po dogodku. Na podlagi obdelave obeh slik lahko dolo\u010dimo spremembe. Slika 2 prikazuje blokovni diagram, kjer lahko ocenimo vi\u0161ino objekta prek in po dogodku. Primer je bil uporabljen leta 2015 za oceno vi\u0161ine gozdov.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-43-1024x402.png\" alt=\"\" class=\"wp-image-1425\" width=\"792\" height=\"311\" srcset=\"https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-43-1024x402.png 1024w, https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-43-300x118.png 300w, https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-43-768x302.png 768w, https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-43.png 1444w\" sizes=\"auto, (max-width: 792px) 100vw, 792px\" \/><figcaption>Slika 2. Blokovni diagram procesiranja slik za zaznavanje sprememb vi\u0161ine objektov.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-46-1024x791.png\" alt=\"\" class=\"wp-image-1429\" width=\"765\" height=\"592\" srcset=\"https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-46-1024x791.png 1024w, https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-46-300x232.png 300w, https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-46-768x593.png 768w, https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-46.png 1146w\" sizes=\"auto, (max-width: 765px) 100vw, 765px\" \/><figcaption>Slika 3. Interferometri\u010dni posnetek iz leta 2013 in 2014.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/02\/image-1024x479.png\" alt=\"\" class=\"wp-image-1569\" width=\"768\" height=\"359\" \/><figcaption>Slika 4. Detekcija sprememb<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/02\/image-4.png\" alt=\"\" class=\"wp-image-1573\" \/><figcaption>Slika 5. Primer zaznave sprememb v slikah SAR.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u0160tudentski ultrazvo\u010dni SAR senzor<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S \u0161tudenti smo izdelali ultrazvo\u010dni SAR senzor. S pomo\u010djo ultrazvoka smo generirali 50kHz frekven\u010dno modulirani signal in uporabili SAR fokusiranje.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/02\/image-5.png\" alt=\"\" class=\"wp-image-1574\" width=\"647\" height=\"387\" \/><figcaption>Slika 6. Ultrazvo\u010dni senzor SAR na tra\u010dnici<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-42-1024x768.png\" alt=\"\" class=\"wp-image-1423\" width=\"768\" height=\"576\" srcset=\"https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-42-1024x768.png 1024w, https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-42-300x225.png 300w, https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-42-768x576.png 768w, https:\/\/au.jovo.cc\/losdv\/wp-content\/uploads\/sites\/4\/2023\/01\/image-42.png 1462w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption>Slika 7. Fokusirana slika SAR<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>V laboratoriju za obdelavo signalov in daljinska vodenja se ukvarjamo z analizo slik radarja z umetno odprtino ali ang. Synthetic Aperture Radar ali na kratko SAR. Radarske slike za svoj nastanek potrebujejo izvor elektromagnetnega valovanja. Slike SAR nastanejo s po\u0161iljanjem frekven\u010dno moduliranega signala od izvora do sprejemnika. Radarske slike uporabljamo za zaznavanje sprememb, avtomatsko izlo\u010danje [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1207","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/au.jovo.cc\/losdv\/wp-json\/wp\/v2\/pages\/1207","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/au.jovo.cc\/losdv\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/au.jovo.cc\/losdv\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/au.jovo.cc\/losdv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/au.jovo.cc\/losdv\/wp-json\/wp\/v2\/comments?post=1207"}],"version-history":[{"count":0,"href":"https:\/\/au.jovo.cc\/losdv\/wp-json\/wp\/v2\/pages\/1207\/revisions"}],"wp:attachment":[{"href":"https:\/\/au.jovo.cc\/losdv\/wp-json\/wp\/v2\/media?parent=1207"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}