{"id":751,"date":"2025-04-28T15:53:23","date_gmt":"2025-04-28T13:53:23","guid":{"rendered":"https:\/\/opi-test.univ-lemans.fr\/?p=751"},"modified":"2025-07-04T13:59:02","modified_gmt":"2025-07-04T11:59:02","slug":"holographie-analyse-dalgorithmes-de-convolution-pour-reconstruire-des-images-a-partir-dhologrammes-numeriques","status":"publish","type":"post","link":"https:\/\/optique-ingenieur.org\/?p=751","title":{"rendered":"Holographie : Analyse d&rsquo;algorithmes de convolution pour reconstruire des images \u00e0 partir d&rsquo;hologrammes num\u00e9riques"},"content":{"rendered":"<h4>Auteur(s) :<\/h4>\n<p style=\"padding-left: 40px;\"><span style=\"color: #3b8dbd;\"><strong>Pascal PICART &#038; Patrice Tankam<\/strong><\/span> \u2013 ENSIM &#8211; Le Mans Universit\u00e9<\/p>\n<h4>R\u00e9sum\u00e9 :<\/h4>\n<p style=\"padding-left: 40px;\">Le cours aborde les algorithmes de convolution pour reconstruire des hologrammes num\u00e9riques hors axe. Le probl\u00e8me de la convolution est abord\u00e9 en consid\u00e9rant les propri\u00e9t\u00e9s spectrales spatiales des hologrammes num\u00e9riques, en particulier la propri\u00e9t\u00e9 de localisation inhabituelle du spectre de Fourier de l&rsquo;hologramme, en ce qui concerne l&rsquo;espace objet physique. Apr\u00e8s avoir d\u00e9termin\u00e9 les exigences d&rsquo;\u00e9chantillonnage pour les fonctions de transfert, trois approches sont consid\u00e9r\u00e9es avec le concept d&rsquo;extension de bande passante spatiale : le remplissage nul, le balayage spectral et le grossissement r\u00e9glable. La discussion th\u00e9orique est compl\u00e9t\u00e9e par des illustrations exp\u00e9rimentales permettant de comparer objectivement les algorithmes.<\/p>\n<div class=\"wp-block-uagb-buttons uagb-buttons__outer-wrap uagb-btn__default-btn uagb-btn-tablet__default-btn uagb-btn-mobile__default-btn uagb-block-7cf61b02\">\n<div class=\"uagb-buttons__wrap uagb-buttons-layout-wrap \"> <\/div>\n<\/div>\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-buttons is-content-justification-right is-layout-flex wp-container-core-buttons-is-layout-765c4724 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-75\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color wp-element-button\" href=\"\/modules\/OPI_M02_C13\/OPI_fr_M02_C13\/OPI_fr_M02_C13_web.publi\/auroraW\/\" style=\"border-radius:0px;background-color:#5cba3c\" target=\"_blank\" rel=\"noreferrer noopener\">MODULE FRAN\u00c7AIS<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-buttons is-content-justification-left is-layout-flex wp-container-core-buttons-is-layout-fdcfc74e wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-75\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color wp-element-button\" href=\"\/modules\/OPI_M02_C13\/OPI_en_M02_C13\/OPI_ang_M02_C13_web.publi\/auroraW\/\" style=\"border-radius:0px;background-color:#5cba3c\" target=\"_blank\" rel=\"noreferrer noopener\">MODULE ANGLAIS<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><h3>T\u00e9l\u00e9chargement :<\/h3><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"\/modules\/pdf\/OPI_fr_M02_C13_papier.pdf\" data-type=\"link\" data-id=\"modules\/pdf\/OPI_fr_M02_C13.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Module fran\u00e7ais au format pdf<\/a><\/li>\n\n\n\n<li><a href=\"\/modules\/pdf\/OPI_ang_M02_C13_papier.pdf\" data-type=\"link\" data-id=\"\/modules\/pdf\/OPI_ang_M02_C13.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Module anglais au format pdf<\/a><\/li>\n<\/ul>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Auteur(s) : Pascal PICART &#038; Patrice Tankam \u2013 ENSIM &#8211; Le Mans Universit\u00e9 R\u00e9sum\u00e9 : Le cours aborde les algorithmes de convolution pour reconstruire des hologrammes num\u00e9riques hors axe. Le probl\u00e8me de la convolution&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":514,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","footnotes":""},"categories":[14],"tags":[],"class_list":["post-751","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-interferences-et-diffraction"],"uagb_featured_image_src":{"full":["https:\/\/optique-ingenieur.org\/wp-content\/uploads\/2024\/04\/15.Alt_.png",552,364,false],"thumbnail":["https:\/\/optique-ingenieur.org\/wp-content\/uploads\/2024\/04\/15.Alt_-150x150.png",150,150,true],"medium":["https:\/\/optique-ingenieur.org\/wp-content\/uploads\/2024\/04\/15.Alt_-300x198.png",300,198,true],"medium_large":["https:\/\/optique-ingenieur.org\/wp-content\/uploads\/2024\/04\/15.Alt_.png",552,364,false],"large":["https:\/\/optique-ingenieur.org\/wp-content\/uploads\/2024\/04\/15.Alt_.png",552,364,false],"1536x1536":["https:\/\/optique-ingenieur.org\/wp-content\/uploads\/2024\/04\/15.Alt_.png",552,364,false],"2048x2048":["https:\/\/optique-ingenieur.org\/wp-content\/uploads\/2024\/04\/15.Alt_.png",552,364,false],"thumb-small":["https:\/\/optique-ingenieur.org\/wp-content\/uploads\/2024\/04\/15.Alt_-80x80.png",80,80,true],"thumb-standard":["https:\/\/optique-ingenieur.org\/wp-content\/uploads\/2024\/04\/15.Alt_-320x320.png",320,320,true],"thumb-medium":["https:\/\/optique-ingenieur.org\/wp-content\/uploads\/2024\/04\/15.Alt_-520x245.png",520,245,true],"thumb-large":["https:\/\/optique-ingenieur.org\/wp-content\/uploads\/2024\/04\/15.Alt_-552x340.png",552,340,true],"thumb-xlarge":["https:\/\/optique-ingenieur.org\/wp-content\/uploads\/2024\/04\/15.Alt_.png",552,364,false],"thumb-xxlarge":["https:\/\/optique-ingenieur.org\/wp-content\/uploads\/2024\/04\/15.Alt_.png",552,364,false]},"uagb_author_info":{"display_name":"admin","author_link":"https:\/\/optique-ingenieur.org\/?author=1"},"uagb_comment_info":0,"uagb_excerpt":"Auteur(s) : Pascal PICART &#038; Patrice Tankam \u2013 ENSIM &#8211; Le Mans Universit\u00e9 R\u00e9sum\u00e9 : Le cours aborde les algorithmes de convolution pour reconstruire des hologrammes num\u00e9riques hors axe. Le probl\u00e8me de la convolution&#46;&#46;&#46;","_links":{"self":[{"href":"https:\/\/optique-ingenieur.org\/index.php?rest_route=\/wp\/v2\/posts\/751","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/optique-ingenieur.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/optique-ingenieur.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/optique-ingenieur.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/optique-ingenieur.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=751"}],"version-history":[{"count":4,"href":"https:\/\/optique-ingenieur.org\/index.php?rest_route=\/wp\/v2\/posts\/751\/revisions"}],"predecessor-version":[{"id":1398,"href":"https:\/\/optique-ingenieur.org\/index.php?rest_route=\/wp\/v2\/posts\/751\/revisions\/1398"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/optique-ingenieur.org\/index.php?rest_route=\/wp\/v2\/media\/514"}],"wp:attachment":[{"href":"https:\/\/optique-ingenieur.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=751"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/optique-ingenieur.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=751"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/optique-ingenieur.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=751"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}