{"id":47998,"date":"2022-12-06T16:44:17","date_gmt":"2022-12-06T15:44:17","guid":{"rendered":"https:\/\/www.upjs.sk\/prirodovedecka-fakulta\/?post_type=cpt_aktuality&#038;p=47998"},"modified":"2023-03-10T18:12:42","modified_gmt":"2023-03-10T17:12:42","slug":"laserove-skenovanie-kluc-k-odhalovaniu-povrchov-tmavych-priestorov","status":"publish","type":"cpt_aktualne_spravy","link":"https:\/\/www.upjs.sk\/prirodovedecka-fakulta\/actual-news\/laserove-skenovanie-kluc-k-odhalovaniu-povrchov-tmavych-priestorov\/","title":{"rendered":"Laserov\u00e9 skenovanie \u2013 k\u013e\u00fa\u010d k odha\u013eovaniu povrchov tmav\u00fdch priestorov"},"content":{"rendered":"\n<p class=\"has-medium-font-size\"><strong>Laserov\u00e9 skenovanie krajiny<\/strong> umo\u017e\u0148uje zachyti\u0165 trojrozmern\u00fa \u0161trukt\u00faru zemsk\u00e9ho povrchu a objektov na \u0148om s vysokou presnos\u0165ou a detailnos\u0165ou r\u00e1dovo v milimetroch. V &nbsp;podobe hust\u00e9ho 3D mra\u010dna bodov okrem z\u00e1znamu geometrie poskytuje aj \u010fal\u0161ie doplnkov\u00e9 atrib\u00faty, spomedzi ktor\u00fdch je obzvl\u00e1\u0161\u0165 u\u017eito\u010dn\u00e1 miera odrazivosti materi\u00e1lu na povrchu. Odrazivos\u0165 je v\u00fdsledkom interakcie tohto materi\u00e1lu a &nbsp;dopadnut\u00e9ho elektromagnetick\u00e9ho \u017eiarenia. Laserov\u00e9 skenovanie<strong> vyu\u017e\u00edva vlastn\u00e9 infra\u010derven\u00e9 \u017eiarenie<\/strong> a tak ho mo\u017eno <strong>vyu\u017ei\u0165 pre skenovanie povrchov tmav\u00fdch priestorov, ak\u00fdmi s\u00fa aj jaskyne<\/strong>. Hodnoty odrazivosti vlnovej d\u013a\u017eky pou\u017eit\u00e9ho lasera s\u00favisia so zlo\u017een\u00edm horn\u00edn, v ktor\u00fdch jasky\u0148a vznikla.<\/p>\n\n\n\n<p class=\"has-medium-font-size\">Presne tieto s\u00favislosti <strong>kolekt\u00edv v\u00fdskumn\u00edkov z \u00dastavu geografie PF UPJ\u0160 v Ko\u0161iciach<\/strong>, University of Louisiana at Lafayette (USA) a Universit\u00e9 C\u00f4te d&#8217;Azur, Universit\u00e9 de Rennes, Universit\u00e9 de Toulouse (Franc\u00fazsko) vyu\u017eil v roku 2018 v r\u00e1mci <a href=\"https:\/\/www.upjs.sk\/prirodovedecka-fakulta\/18808\/\" target=\"_blank\" rel=\"noreferrer noopener\">exped\u00edcie do jaskyne Gouffre Georges<\/a> s cie\u013eom presne <strong>zmapova\u0165 geologick\u00e9 vlastnosti a prejavy tektoniky v severnom \u00fabo\u010d\u00ed franc\u00fazskych Pyrenej\u00ed<\/strong>. &nbsp;Jasky\u0148a Gouffre Georges je unik\u00e1tna t\u00fdm, \u017ee sa formovala pozd\u013a\u017e kontaktu v\u00fdrazne odli\u0161n\u00fdch typov horn\u00edn \u2013 jursk\u00fdch a spodnokriedov\u00fdch karbon\u00e1tov\u00fdch horn\u00edn a premenlivo serpentinizovan\u00e9ho lherzolitu s p\u00f4vodom v hornej \u010dasti zemsk\u00e9ho pl\u00e1\u0161\u0165a, zriedka pozorovate\u013en\u00fdch na zemskom povrchu. <strong>Ve\u013ek\u00e9 rozmery jaskyne (300 x 40 x 40m) nedovo\u013euj\u00fa priamy bezpe\u010dn\u00fd pr\u00edstup geol\u00f3ga k sten\u00e1m a stropu<\/strong>, aby odobral vzorky horniny, zmeral sklony vrstiev a u\u017e v\u00f4bec nie zameral ich presn\u00fa polohu v r\u00e1mci jaskyne a vo\u010di Zemi. <strong>Laserov\u00e9 skenovanie tieto prek\u00e1\u017eky do ve\u013ekej miery prekonalo<\/strong>.&nbsp;<\/p>\n\n\n\n<p class=\"has-medium-font-size\">Av\u0161ak pou\u017eitie intenzity odrazen\u00e9ho laserov\u00e9ho l\u00fa\u010da pre diferenci\u00e1ciu materi\u00e1lov a interpret\u00e1ciu horn\u00edn v r\u00e1mci sk\u00famania ich vz\u00e1jomn\u00e9ho ulo\u017eenia vy\u017eaduje kalibr\u00e1ciu a korekcie ovplyv\u0148uj\u00facich faktorov, ktor\u00e9 s\u00fa v pr\u00edpade jaskyne odli\u0161n\u00e9 ako v nadzemnom prostred\u00ed. Z tohto d\u00f4vodu <strong>v\u00fdskumn\u00fd t\u00edm na \u010dele s doktorandkou Michaelou Nov\u00e1kovou z \u00dastavu geografie PF UPJ\u0160 navrhol postup korekcie intenzity odrazu z pozemn\u00e9ho laserov\u00e9ho skenovania<\/strong>, ktor\u00fd zoh\u013ead\u0148uje vplyv polohy skenera vzh\u013eadom na povrch jaskyne a mikromorfol\u00f3gie jaskynn\u00fdch povrchov. Taktie\u017e sa podarilo eliminova\u0165 vplyv pohltenia \u010dasti laserov\u00e9ho l\u00fa\u010da atmosf\u00e9rou, \u010do sa v be\u017enom prostred\u00ed mimo jaskyne doposia\u013e pre pozemn\u00e9 laserov\u00e9 skenovanie pova\u017eovalo za zanedbate\u013en\u00e9. Jaskynn\u00fd aeros\u00f3l podobn\u00fd jemnej hmle v\u0161ak zna\u010dne oslabuje skenerom vysielan\u00e9 \u017eiarenie. <strong>Okrem navrhnutej metodiky korekcie bol taktie\u017e vyu\u017eit\u00e9 lok\u00e1lne klastrovanie pre anal\u00fdzu a klasifik\u00e1ciu u\u017e korigovan\u00fdch d\u00e1t z\u00edskan\u00fdch z celej mapovanej \u010dasti jaskyne<\/strong>. Odstr\u00e1nil sa probl\u00e9m r\u00f4znej miery odrazivosti v d\u00f4sledku r\u00f4zneho nas\u00fdtenia materi\u00e1lu vodou. Takto pripraven\u00e9 d\u00e1ta umo\u017e\u0148uj\u00fa geol\u00f3gom korektne \u0161tudova\u0165 vz\u00e1jomn\u00e9 ulo\u017eenie a orient\u00e1ciu rozdielnych horn\u00edn v jaskyni v po\u010d\u00edta\u010di aj v miestach, kde nie je bezpe\u010dn\u00fd fyzick\u00fd pr\u00edstup.<\/p>\n\n\n<style>.kb-image_cbcaf7-3c .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image_cbcaf7-3c\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"351\" src=\"https:\/\/www.upjs.sk\/app\/uploads\/sites\/10\/2022\/12\/03.jpg\" alt=\"\" class=\"kb-img wp-image-48002\" srcset=\"https:\/\/www.upjs.sk\/app\/uploads\/sites\/10\/2022\/12\/03.jpg 500w, https:\/\/www.upjs.sk\/app\/uploads\/sites\/10\/2022\/12\/03-300x211.jpg 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><figcaption>Obr. Poh\u013ead zhora a zboku na mra\u010dno bodov mapovan\u00fdch sien\u00ed jaskyne Gouffre Georges zafarben\u00e9 na z\u00e1klade korigovan\u00fdch hodn\u00f4t intenzity odrazu laserov\u00e9ho l\u00fa\u010da. Vybran\u00e1 \u010das\u0165 A) zn\u00e1zor\u0148uje p\u00f4vodn\u00e9 zaznamenan\u00e9 hodnoty intenzity s v\u00fdrazn\u00fdm \u0161umom. Po korekcii B) je \u0161um eliminovan\u00fd a distrib\u00facia hodn\u00f4t v grafe indikuje pr\u00edtomnos\u0165 2 rozdielnych materi\u00e1lov.\u00a0<\/figcaption><\/figure><\/div>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Z vedeck\u00e9ho h\u013eadiska ide o prv\u00fa komplexn\u00fa pr\u00e1cu v jaskynnom prostred\u00ed v oblasti mapovania horn\u00edn v jaskyni,<\/strong> pri\u010dom pou\u017eitie navrhovan\u00e9ho postupu je mo\u017en\u00e9 pre ak\u00fdko\u013evek laserov\u00fd skener a otv\u00e1ra dvere pre automatick\u00fa diferenci\u00e1ciu materi\u00e1lov v jaskynnom prostred\u00ed, v pri v\u00fdstavbe tunelov, ako aj na povrchu po\u010das nepriazniv\u00fdch poveternostn\u00fdch podmienok, vhodn\u00fa pre \u0161irok\u00fa \u0161k\u00e1lu aplik\u00e1cii. Navrhnut\u00e1 metodika korekcie bola publikovan\u00e1 v prest\u00ed\u017enom vedeckom \u010dasopise <strong>Remote Sensing of Environment <\/strong>(IF = 13,85).<\/p>\n\n\n\n<p class=\"has-medium-font-size\">Nov\u00e1kov\u00e1, M., Gallay, M., \u0160upinsk\u00fd, J., Ferr\u00e9, E., Asti, R., de Saint Blanquat, M., Bajolet, F., Sorriaux, P. (2022). Correcting laser scanning intensity recorded in a cave environment for high-resolution lithological mapping: A case study of the Gouffre Georges, France. Remote Sensing of Environment, 280, 113210. <a href=\"https:\/\/doi.org\/10.1016\/j.rse.2022.113210\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/doi.org\/10.1016\/j.rse.2022.113210<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Publikovan\u00fd v\u00fdskum vznikol v r\u00e1mci projektov financovan\u00fdch z prostriedkov M\u0160VV\u0160 SR VEGA 1\/0798\/20<\/strong> \u201cSynergistic use of multisource remote sensing data in Earth system research\u201d a <strong>VEGA 1\/0168\/22<\/strong> \u201cPaleogeographic and geodynamic interpretations of detrital minerals from selected areas of the Western Carpathians: a case study identifying the nature of transport conditions and source areas in karst and non-karst areas\u201d. Laserov\u00fd skener bol zadov\u00e1\u017een\u00fd v r\u00e1mci budovania Univerzitn\u00e9ho vedeck\u00e9ho parku TECHNICOM spolufinancovan\u00e9ho zo \u0161truktur\u00e1lnych fondov Eur\u00f3pskej \u00fanie (ITMS: 26220220182, ITMS2014+: 313011D232).<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Laserov\u00e9 skenovanie krajiny<\/b> umo\u017e\u0148uje zachyti\u0165 trojrozmern\u00fa \u0161trukt\u00faru zemsk\u00e9ho povrchu a objektov na \u0148om s vysokou presnos\u0165ou a detailnos\u0165ou r\u00e1dovo v milimetroch. Ke\u010f\u017ee vyu\u017e\u00edva vlastn\u00e9 infra\u010derven\u00e9 \u017eiarenie, mo\u017eno ho vyu\u017ei\u0165 pre skenovanie povrchov tmav\u00fdch priestorov, ak\u00fdmi s\u00fa aj jaskyne.<\/p>\n","protected":false},"author":25,"featured_media":48028,"menu_order":0,"template":"","meta":{"_editorskit_title_hidden":false,"_editorskit_reading_time":2,"_editorskit_is_block_options_detached":false,"_editorskit_block_options_position":"{}"},"categories":[],"tags":[],"tax_aktuality":[],"acf":{"acf_link_na_externy_obsah":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Laserov\u00e9 skenovanie \u2013 k\u013e\u00fa\u010d k odha\u013eovaniu povrchov tmav\u00fdch priestorov - Pr\u00edrodovedeck\u00e1 fakulta | UPJ\u0160<\/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.upjs.sk\/prirodovedecka-fakulta\/actual-news\/laserove-skenovanie-kluc-k-odhalovaniu-povrchov-tmavych-priestorov\/\" \/>\n<meta property=\"og:locale\" content=\"sk_SK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Laserov\u00e9 skenovanie \u2013 k\u013e\u00fa\u010d k odha\u013eovaniu povrchov tmav\u00fdch priestorov - Pr\u00edrodovedeck\u00e1 fakulta | UPJ\u0160\" \/>\n<meta property=\"og:description\" content=\"Laserov\u00e9 skenovanie krajiny umo\u017e\u0148uje zachyti\u0165 trojrozmern\u00fa \u0161trukt\u00faru zemsk\u00e9ho povrchu a objektov na \u0148om s vysokou presnos\u0165ou a detailnos\u0165ou r\u00e1dovo v milimetroch. Ke\u010f\u017ee vyu\u017e\u00edva vlastn\u00e9 infra\u010derven\u00e9 \u017eiarenie, mo\u017eno ho vyu\u017ei\u0165 pre skenovanie povrchov tmav\u00fdch priestorov, ak\u00fdmi s\u00fa aj jaskyne.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.upjs.sk\/prirodovedecka-fakulta\/actual-news\/laserove-skenovanie-kluc-k-odhalovaniu-povrchov-tmavych-priestorov\/\" \/>\n<meta property=\"og:site_name\" content=\"Pr\u00edrodovedeck\u00e1 fakulta | UPJ\u0160\" \/>\n<meta property=\"article:modified_time\" content=\"2023-03-10T17:12:42+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.upjs.sk\/app\/uploads\/sites\/10\/2022\/12\/obr_akt_laser.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"500\" \/>\n\t<meta property=\"og:image:height\" content=\"322\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Predpokladan\u00fd \u010das \u010d\u00edtania\" \/>\n\t<meta name=\"twitter:data1\" content=\"4 min\u00faty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.upjs.sk\/prirodovedecka-fakulta\/actual-news\/laserove-skenovanie-kluc-k-odhalovaniu-povrchov-tmavych-priestorov\/\",\"url\":\"https:\/\/www.upjs.sk\/prirodovedecka-fakulta\/actual-news\/laserove-skenovanie-kluc-k-odhalovaniu-povrchov-tmavych-priestorov\/\",\"name\":\"Laserov\u00e9 skenovanie \u2013 k\u013e\u00fa\u010d k odha\u013eovaniu povrchov tmav\u00fdch priestorov - 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