{"id":191,"date":"2023-12-19T16:04:32","date_gmt":"2023-12-19T15:04:32","guid":{"rendered":"https:\/\/martin-in.space\/?p=191"},"modified":"2023-12-19T16:04:32","modified_gmt":"2023-12-19T15:04:32","slug":"pixinsight-kalibracne-snimky","status":"publish","type":"post","link":"https:\/\/martin-in.space\/index.php\/2023\/12\/19\/pixinsight-kalibracne-snimky\/","title":{"rendered":"PixInsight &#8211; kalibra\u010dn\u00e9 sn\u00edmky"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Ka\u017ed\u00fd light sn\u00edmok pou\u017eit\u00fd na integr\u00e1ciu do master light, mus\u00ed by\u017e skalibrovan\u00fd s kalibra\u010dn\u00fdmi sn\u00edmkami. Ja pou\u017e\u00edvam tieto:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>master bias<\/li>\n\n\n\n<li>master dark<\/li>\n\n\n\n<li>master flat<\/li>\n<\/ul>\n\n\n\n<!--more-->\n\n\n\n<p class=\"wp-block-paragraph\">E\u0161te existuje aj flatdark, ale ten nie je potrebn\u00fd.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jednotliv\u00e9 master s\u00fabory sa vytv\u00e1raju integr\u00e1ciou. Na to sl\u00fa\u017e\u00ed proces ImageIntegration.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"891\" src=\"https:\/\/martin-in.space\/wp-content\/uploads\/2023\/07\/image.png\" alt=\"\" class=\"wp-image-192\" srcset=\"https:\/\/martin-in.space\/wp-content\/uploads\/2023\/07\/image.png 500w, https:\/\/martin-in.space\/wp-content\/uploads\/2023\/07\/image-168x300.png 168w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><figcaption class=\"wp-element-caption\">ImageIntegration<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Ako to funguje<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Postup integr\u00e1cie a kalibrovania u m\u0148a je tak\u00fdto:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>vytvor\u00edme master bias integr\u00e1ciou jednotliv\u00fdch bias sn\u00edmkov<\/li>\n\n\n\n<li>vytvor\u00edme master dark integr\u00e1ciou jednotliv\u00fdch dark sn\u00edmkov<\/li>\n\n\n\n<li>z master darku od\u010d\u00edtame master bias<\/li>\n\n\n\n<li>na jednotliv\u00e9 flat sn\u00edmky aplikujeme master dark<\/li>\n\n\n\n<li>vytvor\u00edme master flat z individu\u00e1lnych u\u017e skalibrovan\u00fdch flat sn\u00edmkov<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Master bias<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Master bias sn\u00edmok vytv\u00e1rame minim\u00e1lne z 50 jednotliv\u00fdch bias sn\u00edmkov cez process <strong>ImageIntegration<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"491\" height=\"1043\" src=\"https:\/\/martin-in.space\/wp-content\/uploads\/2023\/07\/image-1.png\" alt=\"\" class=\"wp-image-195\" srcset=\"https:\/\/martin-in.space\/wp-content\/uploads\/2023\/07\/image-1.png 491w, https:\/\/martin-in.space\/wp-content\/uploads\/2023\/07\/image-1-141x300.png 141w\" sizes=\"auto, (max-width: 491px) 100vw, 491px\" \/><figcaption class=\"wp-element-caption\">ImageIntegration &#8211; master bias<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Nastavenie dial\u00f3gu<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>cez tla\u010d\u00eddlo<strong> Add Files<\/strong> prida\u0165 bias sn\u00edmky<\/li>\n\n\n\n<li>v \u010dasti <strong>Image Integration<\/strong>:\n<ul class=\"wp-block-list\">\n<li><strong>Combination<\/strong>: Average<\/li>\n\n\n\n<li><strong>Normalization<\/strong>: No Normalization<\/li>\n\n\n\n<li><strong>Weights<\/strong>: Don&#8217;t care (all weights = 1)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>v \u010dasti <strong>Pixel Rejection (1)<\/strong>:\n<ul class=\"wp-block-list\">\n<li><strong>Rejection algorithm<\/strong>: Linear Fit Clipping (konkr\u00e9tny algoritmus z\u00e1vis\u00ed od po\u010dtu bias sn\u00edmkov)<\/li>\n\n\n\n<li><strong>Normalization<\/strong>: No Normalization<\/li>\n\n\n\n<li>nepou\u017ei\u0165 <strong>Generate rejection maps<\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Nepou\u017ei\u0165 <strong>Signal and Noise Evaluation<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Na koniec klikneme na <strong>Apply Global<\/strong> (pln\u00fd kruh) alebo stla\u010d\u00edme <strong>F6<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u00fdsledn\u00fd master bias<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Po ukon\u010den\u00ed procesu sa zobraz\u00ed vysledn\u00fd master bias. Cez ScreenTransferFunction (STF) stretchneme v\u00fdsledok a prezrieme \u010di nen\u00e1jdeme nejak\u00e9 artefakty. Tieto artefakty sa m\u00f4\u017eeme pok\u00fasi\u0165 odstr\u00e1ni\u0165 cze<strong> Pixel Rejection (2)<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1225\" height=\"634\" src=\"https:\/\/martin-in.space\/wp-content\/uploads\/2023\/07\/image-2.png\" alt=\"\" class=\"wp-image-198\"\/><figcaption class=\"wp-element-caption\">Master bias<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Ak sme s v\u00fdsledkom spokojn\u00fd, ulo\u017e\u00edme si ho vo form\u00e1te XISF (Pixel Sample Format 32-bit IEE 754 floating point).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Master dark<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u010eal\u0161\u00edm krokom je vytvorenie master dark sn\u00edmku. Pou\u017eijeme rovnak\u00fd postup ako pri vytvaran\u00ed master bias snimku. Proces ImageIntegration nech\u00e1me otvoren\u00fd a len vyma\u017eame Input files. Ostatn\u00e9 vo\u013eby zostan\u00fa rovnak\u00e9 ako pri vytv\u00e1ran\u00ed master bias sn\u00edmku.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"752\" src=\"https:\/\/martin-in.space\/wp-content\/uploads\/2023\/12\/image.png\" alt=\"\" class=\"wp-image-285\" srcset=\"https:\/\/martin-in.space\/wp-content\/uploads\/2023\/12\/image.png 500w, https:\/\/martin-in.space\/wp-content\/uploads\/2023\/12\/image-199x300.png 199w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><figcaption class=\"wp-element-caption\">ImageIntegration &#8211; master dark<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Na koniec klikneme na <strong>Apply Global<\/strong> (pln\u00fd kruh) alebo stla\u010d\u00edme <strong>F6<\/strong>. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00fdsledn\u00fd master dark si op\u00e4\u0165 ulo\u017e\u00edme vo form\u00e1te XISF, tak ako master bias.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Master flat<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Kalibr\u00e1cia<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pred vytvoren\u00edm master flat sn\u00edmku (integr\u00e1cia jednotliv\u00fdch flat sn\u00edmkov) mus\u00edme najprv jednotliv\u00e9 flat sn\u00edmky skalibrova\u0165. Na t\u00fato kalibr\u00e1ciu pou\u017eijeme pr\u00e1ve vytvoren\u00e9 master sn\u00edmky pre bias a dark v procese nazvanom <strong>ImageCalibration<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"481\" height=\"957\" src=\"https:\/\/martin-in.space\/wp-content\/uploads\/2023\/12\/image-2.png\" alt=\"\" class=\"wp-image-288\" srcset=\"https:\/\/martin-in.space\/wp-content\/uploads\/2023\/12\/image-2.png 481w, https:\/\/martin-in.space\/wp-content\/uploads\/2023\/12\/image-2-151x300.png 151w\" sizes=\"auto, (max-width: 481px) 100vw, 481px\" \/><figcaption class=\"wp-element-caption\">ImageCalibration &#8211; kalibr\u00e1cia flat sn\u00edmkov<\/figcaption><\/figure>\n\n\n\n<ol class=\"wp-block-list\">\n<li>kliknut\u00edm na<strong> Add Files<\/strong> prid\u00e1me jednotliv\u00e9 flat sn\u00edmky<\/li>\n\n\n\n<li>v sekcii Output Files zad\u00e1me adres\u00e1r, kde sa ulo\u017eia skalibrovan\u00e9 flat sn\u00edmky<\/li>\n\n\n\n<li>odklikneme <strong>Signal Evaluation<\/strong> a <strong>Noise Evaluation<\/strong><\/li>\n\n\n\n<li>povol\u00edme <strong>Master Bias<\/strong> sekciu a zad\u00e1me cestu k master bias sn\u00edmku\n<ul class=\"wp-block-list\">\n<li><strong>Calibrate <\/strong>od\u0161ktrneme, nepovol\u00edme<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>povol\u00edme <strong>Master Dark<\/strong> sekciu a zad\u00e1me cestu k master dark sn\u00edmku\n<ul class=\"wp-block-list\">\n<li>za\u0161krtneme <strong>Calibrate <\/strong>a <strong>Optimize <\/strong>vo\u013eby, teda povol\u00edme<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">A nakoniec klineme na <strong>Apply Global<\/strong> (pln\u00fd kruh) alebo stla\u010d\u00edme <strong>F6<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Integr\u00e1cia<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Na vytvorenie master flat sn\u00edmku op\u00e4\u0165 pou\u017eijeme proces <strong>ImageIntegration<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"487\" height=\"1041\" src=\"https:\/\/martin-in.space\/wp-content\/uploads\/2023\/12\/image-4.png\" alt=\"\" class=\"wp-image-295\" srcset=\"https:\/\/martin-in.space\/wp-content\/uploads\/2023\/12\/image-4.png 487w, https:\/\/martin-in.space\/wp-content\/uploads\/2023\/12\/image-4-140x300.png 140w\" sizes=\"auto, (max-width: 487px) 100vw, 487px\" \/><figcaption class=\"wp-element-caption\">ImageIntegration &#8211; master flat<\/figcaption><\/figure>\n\n\n\n<ol class=\"wp-block-list\">\n<li>kliknut\u00edm na<strong> Add Files<\/strong> prid\u00e1me skalibrovan\u00e9 flat sn\u00edmky<\/li>\n\n\n\n<li>v sekcii Image <strong>Integration <\/strong>zad\u00e1me:\n<ul class=\"wp-block-list\">\n<li><strong>Combination<\/strong>: <em>Average<\/em><\/li>\n\n\n\n<li><strong>Normalization<\/strong>: <em>Multiplicative<\/em><\/li>\n\n\n\n<li><strong>Weights<\/strong>: <em>Don&#8217;t care (all weights = 1)<\/em><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>v sekcii <strong>PixelRejection (1)<\/strong>\n<ul class=\"wp-block-list\">\n<li>Rejection algorithm: ak m\u00e1me <strong>7<\/strong> a menej flat sn\u00edmkov tak vyberieme<strong> Percentile Clipping<\/strong>, ak<strong> 7 &#8211; 10 <\/strong>tak <strong>Averaged Sigma Clipping<\/strong>, ak <strong>15 &#8211; 25<\/strong> sn\u00edmkov tak<strong> Winsorised Sigma Clipping <\/strong>a ak <strong>viac ako 25 sn\u00edmkov <\/strong>tak vyberieme<strong> Linear Fit Clipping<\/strong><\/li>\n\n\n\n<li>od\u0161krtneme <strong>Generate rejection maps<\/strong> (nepotrebujeme)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>v sekcii <strong>Pixel Rejection (2) <\/strong>sa m\u00f4\u017eeme pohra\u0165 s jednotliv\u00fdmi nastavenia pre pixel rejection hodnoty (ak sa n\u00e1m nebude pozd\u00e1va\u0165 v\u00fdsledn\u00fd master flat sn\u00edmok)<\/li>\n\n\n\n<li>od\u0161krtneme sekciu <strong>Signal and Noise Evaluation<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Master flat sn\u00edmok vytvor\u00edme cez <strong>Apply Global<\/strong> (pln\u00fd kr\u00fa\u017eok) tla\u010didlo alebo pomocou kl\u00e1vesy <strong>F6<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00fdmto dostaneme v\u00fdsledn\u00fd master flat sn\u00edmok, ktor\u00fd op\u00e4\u0165 ulo\u017e\u00edme vo form\u00e1te XSIF, ako predch\u00e1dzaj\u00face bias a dark master sn\u00edmky.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Z\u00e1ver<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00fdmto postupom sme vytvorili kalibra\u010dn\u00e9 sn\u00edmky, ktor\u00e9 pou\u017eijeme n\u00e1sledne na kalibr\u00e1ciu a integr\u00e1ciu light sn\u00edmkov.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Toto je aktu\u00e1ln\u00fd postup, ktor\u00fd zatia\u013e pou\u017e\u00edvam (v \u010dase p\u00edsania tohto \u010dl\u00e1nku). Ur\u010dite sa d\u00e1 vylep\u0161i\u0165, tak\u017ee ak tento postup budem postupne aktualizova\u0165.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ka\u017ed\u00fd light sn\u00edmok pou\u017eit\u00fd na integr\u00e1ciu do master light, mus\u00ed by\u017e skalibrovan\u00fd s kalibra\u010dn\u00fdmi sn\u00edmkami. Ja pou\u017e\u00edvam tieto:<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,12,11],"tags":[21,37,35,34,36,30,31,32,33,29],"class_list":["post-191","post","type-post","status-publish","format-standard","hentry","category-astrofoto","category-pixinsight-spracovanie","category-spracovanie","tag-astrofoto","tag-imagecalibration","tag-imageintegration","tag-integracia","tag-kalibracia","tag-kalibracne-snimky","tag-master-bias","tag-master-dark","tag-master-flat","tag-pixinsight"],"_links":{"self":[{"href":"https:\/\/martin-in.space\/index.php\/wp-json\/wp\/v2\/posts\/191","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/martin-in.space\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/martin-in.space\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/martin-in.space\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/martin-in.space\/index.php\/wp-json\/wp\/v2\/comments?post=191"}],"version-history":[{"count":16,"href":"https:\/\/martin-in.space\/index.php\/wp-json\/wp\/v2\/posts\/191\/revisions"}],"predecessor-version":[{"id":298,"href":"https:\/\/martin-in.space\/index.php\/wp-json\/wp\/v2\/posts\/191\/revisions\/298"}],"wp:attachment":[{"href":"https:\/\/martin-in.space\/index.php\/wp-json\/wp\/v2\/media?parent=191"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/martin-in.space\/index.php\/wp-json\/wp\/v2\/categories?post=191"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/martin-in.space\/index.php\/wp-json\/wp\/v2\/tags?post=191"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}