{"id":36741,"date":"2019-10-31T22:13:29","date_gmt":"2019-10-31T19:13:29","guid":{"rendered":"https:\/\/prohoster.info\/blog\/uvidet-pochti-nevidimoe-eshhe-i-v-tsvete-metodika-vizualizatsii-obektov-cherez-rasseivatel\/"},"modified":"2019-10-31T22:13:29","modified_gmt":"2019-10-31T19:13:29","slug":"uvidet-pochti-nevidimoe-eshhe-i-v-tsvete-metodika-vizualizatsii-obektov-cherez-rasseivatel","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/news\/uvidet-pochti-nevidimoe-eshhe-i-v-tsvete-metodika-vizualizatsii-obektov-cherez-rasseivatel","title":{"rendered":"T\u00eb shikoni pothuajse t\u00eb padukshmen, madje edhe n\u00eb ngjyra: metodologjia e vizualizimit t\u00eb objekteve p\u00ebrmes nj\u00eb shp\u00ebrndar\u00ebsi","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\"T\u00eb
\n
\nNj\u00eb nga aft\u00ebsit\u00eb m\u00eb t\u00eb njohura t\u00eb Superman-it \u00ebsht\u00eb shikimi super, q\u00eb i lejon atij t\u00eb shqyrtoj\u00eb atomet, t\u00eb shoh\u00eb n\u00eb err\u00ebsir\u00eb dhe n\u00eb distanca t\u00eb m\u00ebdha, si dhe t\u00eb shoh\u00eb p\u00ebrmes objekteve. Kjo aft\u00ebsi rrall\u00eb demonstrohet n\u00eb ekran, por ajo ekziston. N\u00eb realitetin ton\u00eb, gjithashtu mund t\u00eb shohim p\u00ebrmes objekteve pothuajse t\u00eb pap\u00ebrshkueshme nga drita duke aplikuar disa truqe shkencore. Megjithat\u00eb, imazhet q\u00eb jan\u00eb marr\u00eb gjithmon\u00eb kan\u00eb qen\u00eb n\u00eb bardh e zi, deri tani. Sot do t\u00eb njohim nj\u00eb studim, n\u00eb t\u00eb cilin shkenc\u00ebtar\u00ebt nga Universiteti i Duk\u00ebs (SHBA) arrit\u00ebn t\u00eb realizojn\u00eb nj\u00eb fotografi n\u00eb ngjyra t\u00eb objekteve t\u00eb fshehura pas nj\u00eb muri t\u00eb pandri\u00e7uar, duke p\u00ebrdorur nj\u00eb ndri\u00e7im t\u00eb vet\u00ebm. Cila \u00ebsht\u00eb kjo super-teknologji, si funksionon dhe n\u00eb cilat fusha mund t\u00eb aplikohet? K\u00ebt\u00eb do ta na tregoj\u00eb raporti i grupit k\u00ebrkimor. Le t\u00eb fillojm\u00eb.<\/a><\/noindex><\/p>\n

Baza e k\u00ebrkimit<\/h3>\n

\nPavar\u00ebsisht t\u00eb gjitha \"p\u00ebrfitimeve\" t\u00eb mundshme nga teknologjia e vizualizimit t\u00eb objekteve n\u00eb mjedise t\u00eb shp\u00ebrndara, ekziston nj\u00eb s\u00ebr\u00eb problemesh n\u00eb realizimin e k\u00ebsaj teknologjie. Problemi kryesor \u00ebsht\u00eb fakti se rrug\u00ebt e fotoneve q\u00eb kalojn\u00eb p\u00ebrmes shp\u00ebrndar\u00ebsit ndryshojn\u00eb shum\u00eb, gj\u00eb q\u00eb sjell na patterne t\u00eb rast\u00ebsishme. spekle*<\/i> nga ana tjet\u00ebr.<\/p>\n

\"T\u00eb
\nSpekli*<\/b> \u00ebsht\u00eb nj\u00eb model nd\u00ebrhyrjeje rast\u00ebsore, q\u00eb formohet nga nd\u00ebrveprimi i val\u00ebve koherente, t\u00eb cilat kan\u00eb faza t\u00eb rast\u00ebsishme dhe\/ose nj\u00eb konfigurim t\u00eb rast\u00ebsish\u00ebm t\u00eb intensitetit. Shumic\u00ebn e rasteve duket si nj\u00eb grup pikash t\u00eb ndritshme (pikat) mbi nj\u00eb sfond t\u00eb err\u00ebt.<\/p><\/blockquote>\n

Gjat\u00eb viteve t\u00eb fundit jan\u00eb zhvilluar disa metodika vizualizimi, q\u00eb lejojn\u00eb kap\u00ebrcimin e efekteve t\u00eb shp\u00ebrndar\u00ebsit dhe nxjerrjen e informacionit rreth objektit nga skema e speklit. Problemi i k\u00ebtyre metodikave q\u00ebndron n\u00eb kufizimet e tyre \u2014 duhen pasur njohuri t\u00eb caktuara p\u00ebr objektin, duhet pasur qasje n\u00eb mjedisin shp\u00ebrndar\u00ebs ose objektin, etj.<\/p>\n

N\u00eb t\u00eb nj\u00ebjt\u00ebn koh\u00eb, ekziston nj\u00eb metod\u00eb m\u00eb e avancuar, sipas shkenc\u00ebtar\u00ebve, - vizualizimi me efektin e kujtes\u00ebs (ME). Kjo metod\u00eb lejon vizualizimin e nj\u00eb objekti pa njohuri t\u00eb m\u00ebparshme n\u00eb lidhje me t\u00eb ose mjedisin shp\u00ebrndar\u00ebs. T\u00eb gjith\u00eb kan\u00eb disavantazhe, si\u00e7 e dim\u00eb, dhe metoda ME nuk \u00ebsht\u00eb p\u00ebrjashtim. P\u00ebr t\u00eb marr\u00eb modele spekle me kontrast t\u00eb lart\u00eb dhe, p\u00ebr pasoj\u00eb, imazhe m\u00eb t\u00eb sakta, ndri\u00e7imi duhet t\u00eb jet\u00eb me bandwidth t\u00eb ngusht\u00eb, pra m\u00eb pak se 1 nm.<\/p>\n

\u00cbsht\u00eb gjithashtu e mundur t\u00eb kalosh kufizimet e metod\u00ebs ME, por edhe nj\u00ebher\u00eb, k\u00ebto truk jan\u00eb t\u00eb lidhura me qasjen n\u00eb burimin optik ose objektin para dispersor\u00ebs, ose me matjen direkte. PSF*<\/i>.<\/p>\n

PSF*<\/b> \u2014 funksioni i shp\u00ebrndarjes s\u00eb pik\u00ebs, q\u00eb p\u00ebrshkruan imazhin q\u00eb merr sistemi i formimit kur v\u00ebzhgon nj\u00eb burim drit\u00eb pikor ose nj\u00eb objekt pikor. <\/p><\/blockquote>\n

K\u00ebrkuesit i quajn\u00eb k\u00ebto metoda funksionale, por jo t\u00eb p\u00ebrsosura, pasi matja e PSF-s\u00eb nuk \u00ebsht\u00eb gjithmon\u00eb e mundur p\u00ebr shkak, p\u00ebr shembull, t\u00eb dinamizmit t\u00eb dispersorit ose paq\u00ebndrueshm\u00ebris\u00eb s\u00eb tij para procedur\u00ebs s\u00eb vizualizimit. Nj\u00eb fjal\u00eb tjet\u00ebr, ka ende pun\u00eb p\u00ebr t\u00eb b\u00ebr\u00eb. <\/p>\n

N\u00eb punimin e tyre, k\u00ebrkuesit propozojn\u00eb nj\u00eb qasje tjet\u00ebr. Ata na demonstrojn\u00eb metod\u00ebn e realizimit t\u00eb vizualizimit multispektral t\u00eb objekteve p\u00ebrmes nj\u00eb ambienti shp\u00ebrndar\u00ebs duke p\u00ebrdorur nj\u00eb matje t\u00eb vetme spekle me nj\u00eb kamer\u00eb monochrome. Ndryshe nga metodologjit\u00eb e tjera, kjo nuk k\u00ebrkon njohuri paraprake mbi sistemin PSF ose spektrin e burimit.<\/p>\n

Metoda e re lejon krijimin e imazheve me cil\u00ebsi t\u00eb lart\u00eb t\u00eb objektit t\u00eb synuar n\u00eb pes\u00eb kanale spektrale t\u00eb ndara mir\u00eb midis 450 nm dhe 750 nm, gj\u00eb q\u00eb \u00ebsht\u00eb konfirmuar nga llogaritjet. N\u00eb praktik\u00eb, megjithat\u00eb, \u00ebsht\u00eb arritur deri tani t\u00eb realizohet vizualizimi i tre kanaleve spektrale t\u00eb ndara mir\u00eb midis 450 nm dhe 650 nm dhe gjasht\u00eb kanaleve spektrale ngjitur midis 515 dhe 575 nm.<\/p>\n

Princi i funksionimit t\u00eb metod\u00ebs s\u00eb re<\/h3>\n

\n\"T\u00eb
\nImazhi \u21161: llamba \u2014 modulatori hap\u00ebsinor i drit\u00ebs \u2014 dispersorja (me diafragm\u00eb iris) \u2014 apertur\u00eb kodifikuese \u2014 prisma \u2014 rel\u00e9 optik (vizualizimi 1:1) \u2014 kamera monochrome.<\/i><\/p>\n

K\u00ebrkuesit sh\u00ebnojn\u00eb tre elemente kryesore t\u00eb \u00e7do vizualizimi p\u00ebrmes dispersorit: objekti i interesit (i ndri\u00e7uar nga jasht\u00eb ose q\u00eb shk\u00eblqen vet\u00eb), dispersori dhe detektori.<\/p>\n

Si n\u00eb sistemet standarde ME, n\u00eb k\u00ebt\u00eb studim shqyrtohet objekti, madh\u00ebsia k\u00ebndore e t\u00eb cilit \u00ebsht\u00eb brenda fush\u00ebs s\u00eb shikimit t\u00eb ME dhe n\u00eb nj\u00eb distanc\u00eb u pas dispersorit. Pas nd\u00ebrveprimit me dispersorin, drita p\u00ebrhapet n\u00eb nj\u00eb distanc\u00eb v, para se t\u00eb arrij\u00eb te detektori. <\/p>\n

Vizualizimi normal ME p\u00ebrdor kamera standarde, nd\u00ebrsa n\u00eb k\u00ebt\u00eb metod\u00eb p\u00ebrdoret nj\u00eb modul i detektorit kodues, i p\u00ebrb\u00ebr\u00eb nga nj\u00eb apertur\u00eb koduese dhe nj\u00eb element optik q\u00eb varet nga gjat\u00ebsia e val\u00ebs. Q\u00ebllimi i k\u00ebtij elementi \u00ebsht\u00eb modifikimi unik i \u00e7do kanali spektral p\u00ebrpara se ata t\u00eb kombinohen dhe t\u00eb transformohen n\u00eb nj\u00eb detektor monochromik.<\/p>\n

Pra, n\u00eb vend t\u00eb matjes s\u00eb thjesht\u00eb t\u00eb spek\u00ebs me kontrast t\u00eb ul\u00ebt, kanalet spektrale t\u00eb s\u00eb cilave jan\u00eb t\u00eb p\u00ebrziera pa mund\u00ebsi kthimi, \u00ebsht\u00eb regjistruar nj\u00eb sinjal spektralisht shum\u00ebfishuar, i cili \u00ebsht\u00eb i p\u00ebrshtatsh\u00ebm p\u00ebr ndarjen.<\/p>\n

Hulumtuesit theksojn\u00eb p\u00ebrs\u00ebri se metoda e tyre nuk k\u00ebrkon asnj\u00eb karakteristik\u00eb t\u00eb njohur paraprakisht ose supozime n\u00eb lidhje me shp\u00ebrndar\u00ebsin apo burimin e drit\u00ebs.<\/p>\n

Pas kryerjes s\u00eb matjeve paraprake t\u00eb spek\u00ebs shum\u00ebfishuar, u p\u00ebrdor nj\u00eb vler\u00eb e njohur T\u03bb (patkua koduese q\u00eb varet nga gjat\u00ebsia e val\u00ebs) p\u00ebr rikonstruktimin individual t\u00eb spek\u00ebs n\u00eb \u00e7do band\u00eb spektrale.<\/p>\n

N\u00eb pun\u00ebn e tyre n\u00eb faz\u00ebn e llogaritjeve dhe modelimit, shkenc\u00ebtar\u00ebt aplikuan metoda t\u00eb caktuara t\u00eb m\u00ebsimit t\u00eb makinerive, t\u00eb cilat mund t\u00eb ndihmojn\u00eb n\u00eb realizimin e nj\u00eb metode deri tani t\u00eb pa shqyrtuar. S\u00eb pari, u p\u00ebrdor m\u00ebsimi i ve\u00e7orive t\u00eb matric\u00ebs s\u00eb shp\u00ebrndar\u00eb p\u00ebr paraqitjen e spek\u00ebs. <\/p>\n

M\u00ebsimi i ve\u00e7orive*<\/b> \u2014 i lejon sistemit t\u00eb gjej\u00eb automatikisht paraqitjet e nevojshme p\u00ebr identifikimin e ve\u00e7orive t\u00eb t\u00eb dh\u00ebnave origjinale.<\/p><\/blockquote>\n

Si rezultat jan\u00eb marr\u00eb nj\u00eb baz\u00eb e trajnueshme mbi imazhet speklore nga konfigurata t\u00eb ndryshme mat\u00ebse. Kjo baz\u00eb \u00ebsht\u00eb mjaft e p\u00ebrgjithshme dhe nuk varet nga objektet specifike dhe shp\u00ebrndar\u00ebsit q\u00eb marrin pjes\u00eb n\u00eb gjenerimin e mask\u00ebs I\u03bbx, y. N\u00eb fjal\u00eb t\u00eb tjera, sistemi e m\u00ebson baz\u00ebn n\u00eb lidhje me shp\u00ebrndar\u00ebsin q\u00eb nuk p\u00ebrdoret n\u00eb konfigurimin eksperimental, dometh\u00ebn\u00eb, sistemi nuk ka akses n\u00eb t\u00eb, ashtu si\u00e7 e d\u00ebshironin hulumtuesit.<\/p>\n

P\u00ebr t\u00eb marr\u00eb imazhe speklore n\u00eb \u00e7do gjat\u00ebsin\u00eb e val\u00ebs u p\u00ebrdor algoritmi OMP (p\u00ebrndryshe ndjek\u00ebs t\u00eb p\u00ebrputhjes ortogonale<\/i>).<\/p>\n

N\u00eb fund, duke llogaritur autokorrelaimin e \u00e7do kanali spektral n\u00eb m\u00ebnyr\u00eb t\u00eb pavarur dhe duke inverzuar autokorrelaimin n\u00eb \u00e7do gjat\u00ebsin\u00eb e val\u00ebs jan\u00eb marr\u00eb imazhe t\u00eb objektit. Imazhet e marra n\u00eb \u00e7do gjat\u00ebsin\u00eb e val\u00ebs pastaj kombinohen p\u00ebr t\u00eb krijuar nj\u00eb imazh me ngjyra t\u00eb objektit.<\/p>\n

\"T\u00eb
\nImazhi Nr. 2: procesi i hap pas hapi p\u00ebr p\u00ebrgatitjen e imazhit t\u00eb objektit.
\nSipas krijuesve t\u00eb saj, kjo metod\u00eb nuk b\u00ebn asnj\u00eb supozim mbi korelacionet midis kanaleve spektrale dhe k\u00ebrkon vet\u00ebm supozimin se vlera e gjat\u00eb s\u00eb val\u00ebs \u00ebsht\u00eb mjaft rast\u00ebsore. P\u00ebrve\u00e7 k\u00ebsaj, kjo metod\u00eb k\u00ebrkon vet\u00ebm informacion mbi detektor\u00ebt kodues, duke u mb\u00ebshtetur n\u00eb kalibrimin paraprak t\u00eb hap\u00ebsir\u00ebs koduese dhe nj\u00eb bibliotek\u00eb t\u00eb dh\u00ebnash t\u00eb trajnuar m\u00eb par\u00eb. K\u00ebto karakteristika e b\u00ebjn\u00eb k\u00ebt\u00eb metod\u00eb vizualizimi shum\u00eb universale dhe joinvazive. <\/p>\n

Rezultatet e modelimit<\/h3>\n

\nFillimisht do t\u00eb shqyrtojm\u00eb rezultatet e modelimit. <\/p>\n

\"T\u00eb
\nImazhi Nr. 3<\/i><\/p>\n

N\u00eb imazhin e m\u00ebsip\u00ebrm, jan\u00eb paraqitur shembuj t\u00eb skenave multispektrale t\u00eb dy objekteve t\u00eb b\u00ebra p\u00ebrmes nj\u00eb shp\u00ebrndar\u00ebsit. Rreshti i sip\u00ebrm n\u00eb 3a<\/b> p\u00ebrmban objektin e interesit, q\u00eb p\u00ebrb\u00ebhet nga disa numra, t\u00eb paraqitur si n\u00eb ngjyr\u00eb t\u00eb rreme, ashtu edhe n\u00eb ndarjen p\u00ebr kanal spektral. Kur ndodhet objekti n\u00eb ngjyr\u00eb t\u00eb rreme, paraqitet profili i intensitetit t\u00eb \u00e7do gjat\u00ebsie vale n\u00eb hap\u00ebsir\u00ebn CIE 1931 RGB.<\/p>\n

Objekti i rikonstruktuar (rreshti i posht\u00ebm n\u00eb 3a<\/b>) si n\u00eb ngjyr\u00eb t\u00eb rreme, ashtu edhe n\u00eb lidhje me kanalet spektrale t\u00eb ve\u00e7anta, tregon se metoda ofron nj\u00eb vizualizim t\u00eb shk\u00eblqyer dhe vet\u00ebm nj\u00eb nd\u00ebrveprim t\u00eb vog\u00ebl nd\u00ebrkufitar midis kanaleve spektrale, i cili nuk luan nj\u00eb rol t\u00eb ve\u00e7ant\u00eb n\u00eb proces.<\/p>\n

Pas marrjes s\u00eb objektit t\u00eb rikonstruktuar, dometh\u00ebn\u00eb, pas vizualizimit, ishte e nevojshme t\u00eb vler\u00ebsohej shkalla e sakt\u00ebsis\u00eb, duke krahasuar intensitetin spektral (i p\u00ebrqendruar n\u00eb t\u00eb gjitha piksel\u00ebt e ndritsh\u00ebm) t\u00eb objektit t\u00eb v\u00ebrtet\u00eb dhe t\u00eb rikonstruktuar (3b<\/b>).<\/p>\n

N\u00eb imazhet 3c<\/b> jan\u00eb paraqitur objekti i v\u00ebrtet\u00eb (rreshti i sip\u00ebrm) dhe imazhi i rikonstruktuar (rreshti i posht\u00ebm) p\u00ebr nj\u00eb qeliz\u00eb nga dega e pambukut, dhe n\u00eb 3d<\/b> \u00ebsht\u00eb paraqitur analiza e sakt\u00ebsis\u00eb s\u00eb vizualizimit.<\/p>\n

P\u00ebr t\u00eb vler\u00ebsuar sakt\u00ebsin\u00eb e vizualizimit, ishte e nevojshme t\u00eb llogariteshin vlerat e koeficientit t\u00eb ngjashm\u00ebris\u00eb strukturore (SSIM) dhe raporti maksimal i sinjalit ndaj zhurm\u00ebs (pSNR) t\u00eb objektit t\u00eb v\u00ebrtet\u00eb p\u00ebr secilin kanal spektral.<\/p>\n

\"T\u00eb
\n
\nTabela e m\u00ebsip\u00ebrme tregon se \u00e7do nj\u00eb nga pes\u00eb kanalet ka nj\u00eb koeficient SSIM 0,8\u20130,9 dhe PSNR mbi 20. Kjo tregon se, megjith\u00ebse kontrasti i sinjalit spekular \u00ebsht\u00eb i ul\u00ebt, mbivendosja n\u00eb detektor\u00ebt e pes\u00eb brezave spektral\u00eb me gjer\u00ebsi 10 nm lejon nj\u00eb rikonstruksion t\u00eb mjaftuesh\u00ebm t\u00eb pronave hap\u00ebsinore-spektrale t\u00eb objektit t\u00eb studiuar. Me fjal\u00eb t\u00eb tjera, metodologia funksionon, megjithat\u00eb k\u00ebto jan\u00eb vet\u00ebm rezultate simulimi. P\u00ebr t\u00eb pasur nj\u00eb siguri m\u00eb t\u00eb plot\u00eb, shkenc\u00ebtar\u00ebt zhvilluan nj\u00eb s\u00ebr\u00eb eksperimentesh praktike.<\/p>\n

Rezultatet e eksperimenteve<\/h3>\n

\nNj\u00eb nga dallimet m\u00eb t\u00eb r\u00ebnd\u00ebsishme midis modelingut dhe eksperimenteve reale \u00ebsht\u00eb ambienti, pra kushtet n\u00eb t\u00eb cilat kryhet t\u00eb dyja. N\u00eb rastin e par\u00eb, jan\u00eb kushte t\u00eb kontrolluara, n\u00eb t\u00eb dytin \u2014 t\u00eb paparashikuara, pra, si do t\u00eb dalin.<\/p>\n

U shqyrtuan tre kanale spektrale me gjer\u00ebsi 8-12 nm me qend\u00ebr n\u00eb 450, 550 dhe 650 nm, t\u00eb cilat n\u00eb kombinim me sasi t\u00eb ndryshme relative gjenerojn\u00eb nj\u00eb gam\u00eb t\u00eb gjer\u00eb ngjyrash.<\/p>\n

\"T\u00eb
\nImazhi Nr. 4<\/i><\/p>\n

N\u00eb imazhin e m\u00ebsip\u00ebrm tregohet krahasimi midis objektit real (letra shum\u00ebngjyr\u00ebshe \u201cH\u201d) dhe atij t\u00eb rikonstruktuar. Koh\u00ebzgjatja e ekspozimit ishte vendosur n\u00eb 1800 s, e cila lejoni nj\u00eb SNR n\u00eb kufijt\u00eb e 60-70 dB. Ky tregues SNR, sipas shkenc\u00ebtar\u00ebve, nuk \u00ebsht\u00eb jasht\u00ebzakonisht i r\u00ebnd\u00ebsish\u00ebm p\u00ebr eksperimentin, por sh\u00ebrben si nj\u00eb konfirmim shtes\u00eb i funksionimit t\u00eb metodologjis\u00eb s\u00eb tyre, ve\u00e7an\u00ebrisht n\u00eb rastin e objekteve komplekse. N\u00eb realitet, dhe jo n\u00eb kushte laboratorike, kjo metod\u00eb mund t\u00eb jet\u00eb nj\u00eb rend m\u00eb e shpejt\u00eb.<\/p>\n

N\u00eb rreshtin e sip\u00ebrm t\u00eb imazhit nr. 4 tregohet objekti n\u00eb \u00e7do gjat\u00ebsi vale (majtas-djathtas) dhe objekti i plote me ngjyra.<\/p>\n

P\u00ebr t\u00eb marr\u00eb nj\u00eb imazh t\u00eb objektit real n\u00eb rezultatin e vizualizimit, u p\u00ebrdor nj\u00eb kamer\u00eb v\u00ebzhgimi automatik me filtre p\u00ebrkat\u00ebse p\u00ebr t\u00eb shfaqur drejtp\u00ebrdrejt komponent\u00ebt spektral\u00eb dhe p\u00ebr t\u00eb marr\u00eb nj\u00eb imazh me ngjyra t\u00eb plot\u00eb duke u mbledhur kanalet spektral\u00eb rezultant\u00eb.<\/p>\n

Rreshti i dyt\u00eb i imazhit m\u00eb sip\u00ebr tregon modelet e autocorreletit t\u00eb \u00e7do kanali spektral t\u00eb rikonstruktuar, t\u00eb cilat formojn\u00eb matjet e shum\u00ebfishta q\u00eb jan\u00eb t\u00eb dh\u00ebnat hyr\u00ebse p\u00ebr faz\u00ebn e p\u00ebrpunimit t\u00eb t\u00eb dh\u00ebnave.<\/p>\n

Rreshti i tret\u00eb \u00ebsht\u00eb nj\u00eb objekt i rikonstruktuar n\u00eb \u00e7do kanal spektral, si dhe nj\u00eb objekt i rikonstruktuar me ngjyra t\u00eb plota, dmth rezultati p\u00ebrfundimtar i vizualizimit.<\/p>\n

Imazhi me ngjyra t\u00eb plota tregon se sasin\u00eb relative mes kanaleve spektrale \u00ebsht\u00eb gjithashtu e sakt\u00eb, pasi ngjyra e imazhit t\u00eb rikonstruktuar p\u00ebrputhet me vler\u00ebn reale, dhe koeficienti SSIM arrin m\u00eb shum\u00eb se 0,92 p\u00ebr \u00e7do kanal.<\/p>\n

Rreshti m\u00eb i ul\u00ebt \u00ebsht\u00eb nj\u00eb konfirmim i k\u00ebtij pohimi, duke demonstruar krahasimin e intensitetit t\u00eb subjektit real dhe t\u00eb rikonstruktuar. T\u00eb dh\u00ebnat e t\u00eb dyve p\u00ebrputhen n\u00eb t\u00eb gjitha gamat spektrale.<\/p>\n

K\u00ebshtu, edhe prania e zhurm\u00ebs dhe gabimeve t\u00eb mundshme n\u00eb modelim nuk penguan marrjen e nj\u00eb imi t\u00eb cil\u00ebsis\u00eb s\u00eb lart\u00eb, dhe rezultatet e eksperimenteve jan\u00eb n\u00eb p\u00ebrputhje t\u00eb shk\u00eblqyer me rezultatet e modelimit.<\/p>\n

Eksperimentin e lartp\u00ebrmendur e kemi realizuar duke marr\u00eb parasysh kanalet spektrale t\u00eb ndara. Shkenc\u00ebtar\u00ebt kryen nj\u00eb tjet\u00ebr eksperiment, por tashm\u00eb me kanale af\u00ebr, m\u00eb sakt\u00ebsisht me nj\u00eb gam\u00eb spektrale t\u00eb vazhdueshme prej 60 nm.<\/p>\n

\"T\u00eb
\nImazhi Nr. 5<\/i><\/p>\n

Si objekt real sh\u00ebrbeu letra \"X\" dhe shenja \"+\" (5a<\/b>). Spektri i letters \"X\" \u00ebsht\u00eb relativisht i barabart\u00eb dhe i vazhduesh\u00ebm - midis 515 dhe 575 nm, nd\u00ebrsa \"+\" ka nj\u00eb spektral t\u00eb strukturuar, kryesisht i vendosur midis 535 dhe 575 nm (5b<\/b>). P\u00ebr k\u00ebt\u00eb eksperiment, ekspozita ishte 120 s p\u00ebr t\u00eb arritur SNR t\u00eb d\u00ebshiruar (si\u00e7 ishte m\u00eb par\u00eb) prej 70 dB.<\/p>\n

Po ashtu, u p\u00ebrdor nj\u00eb filtrues brez\u00ebsh me gjer\u00ebsi 60 nm mbi t\u00eb gjith\u00eb objektin dhe nj\u00eb filtrues t\u00eb ul\u00ebt mbi shenj\u00ebn \"+\". Gjat\u00eb rikonstruksionit, spektri 60 nm ndahet n\u00eb 6 kanale ngjitur me gjer\u00ebsi 10 nm (5b<\/b>).<\/p>\n

Sipas pamjeve 5c<\/b>, imazhet rezultate jan\u00eb n\u00eb p\u00ebrputhje t\u00eb shk\u00eblqyer me objektin real. Ky eksperiment tregoi se prania ose mungesa e korelacioneve spektrale n\u00eb spekulin e matur nuk ndikon n\u00eb efikasitetin e metodologjis\u00eb s\u00eb vizualizimit t\u00eb shqyrtuar. Shkenc\u00ebtar\u00ebt vet konsiderojn\u00eb se nj\u00eb rol m\u00eb t\u00eb madh n\u00eb procesin e vizualizimit, m\u00eb sakt\u00ebsisht n\u00eb suksesin e tij, luajn\u00eb jo aq shum\u00eb karakteristikat spektrale t\u00eb subjektit, sa kalibrimi i sistemit dhe detajet e detektorit t\u00eb tij kodifikues.<\/p>\n

Epilogu<\/h3>\n

\nN\u00eb k\u00ebt\u00eb punim, shkenc\u00ebtar\u00ebt p\u00ebrshkruan nj\u00eb metod\u00eb t\u00eb re t\u00eb vizualizimit multispektral p\u00ebrmes nj\u00eb shp\u00ebrndar\u00ebsi. Modifikimi i spektra, i varur nga gjat\u00ebsi e val\u00ebs, me an\u00eb t\u00eb nj\u00eb apertur\u00eb koduese, lejon realizimin e nj\u00eb matjeje t\u00eb shum\u00ebfisht\u00eb dhe llogaritjen e spektrit p\u00ebrmes algoritmit OMP t\u00eb bazuar n\u00eb m\u00ebsimin e makin\u00ebs. <\/p>\n

Me shembuj t\u00eb shkronj\u00ebs s\u00eb ngjyrave \"H\", shkenc\u00ebtar\u00ebt treguan se p\u00ebrqendrimi n\u00eb pes\u00eb kanale spektrale, q\u00eb p\u00ebrkojn\u00eb me ngjyrat vjollc\u00eb, t\u00eb gjelb\u00ebr dhe tri nuanca t\u00eb kuqe, mund t\u00eb sjell\u00eb nj\u00eb rikonstruksion t\u00eb imazhit q\u00eb p\u00ebrmban t\u00eb gjitha ngjyrat e origjinalit (blu, e verdh\u00eb, etj.). <\/p>\n

Sipas hulumtuesve, metodologia e tyre mund t\u00eb jet\u00eb e dobishme si n\u00eb mjek\u00ebsi, ashtu edhe n\u00eb astronomi. Ngjyra mb Carry mesajhe t\u00eb r\u00ebnd\u00ebsishme n\u00eb t\u00eb dyja drejtimet: n\u00eb astronomi \u2014 p\u00ebrb\u00ebrjen kimike t\u00eb objekteve q\u00eb studiohen, n\u00eb mjek\u00ebsi \u2014 p\u00ebrb\u00ebrjen molekulare t\u00eb qelizave dhe indeve.<\/p>\n

N\u00eb k\u00ebt\u00eb faz\u00eb, shkenc\u00ebtar\u00ebt v\u00ebrejn\u00eb vet\u00ebm nj\u00eb problem, i cili mund t\u00eb shkaktoj\u00eb pasakt\u00ebsi n\u00eb vizualizim, jan\u00eb gabimet e modelimit. P\u00ebr shkak t\u00eb koh\u00ebs s\u00eb mjaftueshme q\u00eb nevojitet p\u00ebr realizimin e procesit, mund t\u00eb ndodhin ndryshime n\u00eb ambient, t\u00eb cilat do t\u00eb b\u00ebjn\u00eb korrigjime q\u00eb nuk jan\u00eb marr\u00eb parasysh n\u00eb faz\u00ebn e p\u00ebrgatitjes. Megjithat\u00eb, n\u00eb t\u00eb ardhmen planifikohet t\u00eb gjendet nj\u00eb m\u00ebnyr\u00eb p\u00ebr t\u00eb reduktuar k\u00ebt\u00eb problem, duke e b\u00ebr\u00eb metodologjin\u00eb e vizualizimit t\u00eb p\u00ebrshkruar jo vet\u00ebm t\u00eb sakt\u00eb, por edhe t\u00eb q\u00ebndrueshme n\u00eb \u00e7do kusht.<\/p>\n

Tema e p\u00ebrgjithshme e Premtes:<\/b>

\r\n \"Luaj\r\n
<\/div>\r\n <\/div><\/center>
\nDrita, ngjyra, muzika dhe trio m\u00eb t\u00eb famshme t\u00eb \"\u00e7udirave\" blu n\u00eb bot\u00eb (Blue Man Group).<\/i><\/p>\n

Faleminderit p\u00ebr v\u00ebmendjen, q\u00ebndroni kurioz\u00eb dhe ju d\u00ebshoj nj\u00eb fundjav\u00eb t\u00eb shk\u00eblqyer, djem! \ud83d\ude42<\/p>\n

\nFaleminderit q\u00eb q\u00ebndroni me ne. Ju p\u00eblqejn\u00eb artikujt tan\u00eb? D\u00ebshironi t\u00eb shihni m\u00eb shum\u00eb materiale interesante? Na mb\u00ebshtetni duke b\u00ebr\u00eb nj\u00eb porosi ose duke na rekomanduar miqve tuaj. 30% zbritje p\u00ebr p\u00ebrdoruesit e Habra n\u00eb nj\u00eb analog unik t\u00eb server\u00ebve entry-level, t\u00eb cilin e kemi shpikur p\u00ebr ju:<\/b> E gjith\u00eb e v\u00ebrteta p\u00ebr VPS (KVM) E5-2650 v4 (6 B\u00ebrthama) 10GB DDR4 240GB SSD 1Gbps nga $20 ose si t\u00eb ndajm\u00eb sakt\u00ebsisht serverin?<\/a><\/noindex> (opcionet me RAID1 dhe RAID10, deri n\u00eb 24 b\u00ebrthama dhe deri n\u00eb 40GB DDR4 jan\u00eb t\u00eb disponueshme).<\/p>\n

Dell R730xd p\u00ebr dy her\u00eb m\u00eb lir\u00eb?<\/b> Vet\u00ebm te ne 2 x Intel TetraDeca-Core Xeon 2x E5-2697v3 2.6GHz 14C 64GB DDR4 4x960GB SSD 1Gbps 100 TB nga $199<\/a><\/noindex> n\u00eb Holand\u00eb! Dell R420 \u2014 2x E5-2430 2.2Ghz 6C 128GB DDR3 2x960GB SSD 1Gbps 100TB \u2014 nga $99!<\/b><\/b> Lexoni rreth Si t\u00eb nd\u00ebrtoni nj\u00eb infrastruktur\u00eb t\u00eb klas\u00ebs korporative me p\u00ebrdorimin e server\u00ebve Dell R730xd E5-2650 v4 me \u00e7mim 9000 euro p\u00ebr pak para?<\/a><\/noindex>
\n
Burimi: habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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P\u00ebr nj\u00eb njohuri m\u00eb t\u00eb holl\u00ebsishme mbi nuancat e studimit, rekomandoj t\u00eb shikoni n\u00eb raportin e shkenc\u00ebtar\u00ebve<\/a><\/noindex> dhe materiale shtes\u00eb<\/a><\/noindex> p\u00ebr t\u00eb.<\/p>\n