{"id":6458,"date":"2026-03-12T16:36:45","date_gmt":"2026-03-12T16:36:45","guid":{"rendered":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/?p=6458"},"modified":"2026-03-20T14:07:12","modified_gmt":"2026-03-20T14:07:12","slug":"pesci-molluschi","status":"publish","type":"post","link":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/2026\/03\/12\/pesci-molluschi\/","title":{"rendered":"Vita marina, retini e effetto Moir\u00e9"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Ho realizzato una serie di grafiche ispirate alla vita marina. Formato quadrato, colori e forme ben marcati.<br>Ho voluto colorare ampie porzioni con la tecnica della <a href=\"https:\/\/it.wikipedia.org\/wiki\/Retinatura\" target=\"_blank\" rel=\"noreferrer noopener\">retinatura<\/a> (halftone).<\/p>\n\n\n\n<p class=\"has-large-font-size wp-block-paragraph\">I testi si rapportano con la grafica scomponendosi in vari piani, suggerendo la profondit\u00e0 di campo e la tridimensionalit\u00e0.<\/p>\n\n\n\n<p class=\"has-large-font-size wp-block-paragraph\">I contenuti sono ispirati dalle caratteristiche dei vari animali, la caparbiet\u00e0 per il <strong>salmone<\/strong>, l&#8217;attitudine al mimetismo -e dunque all&#8217;adattamento- per il <strong>polpo<\/strong>, la responsabilit\u00e0 (tra virgolette&#8230;) di essere un predatore apicale per l&#8217;<strong>orca<\/strong>.<\/p>\n\n\n\n<div class=\"wp-block-group alignwide is-nowrap is-layout-flex wp-container-core-group-is-layout-3a88641f wp-block-group-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/risalire2%403x-80-1.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/risalire2%403x-80-1.jpg?resize=1024%2C1024&#038;ssl=1\" alt=\"\" class=\"wp-image-7216\" srcset=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/risalire2%403x-80-1.jpg?resize=1024%2C1024&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/risalire2%403x-80-1.jpg?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/risalire2%403x-80-1.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/risalire2%403x-80-1.jpg?resize=768%2C768&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/risalire2%403x-80-1.jpg?resize=1536%2C1536&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/risalire2%403x-80-1.jpg?w=1951&amp;ssl=1 1951w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large has-custom-border\"><a href=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/Octopus%403x-80-1.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/Octopus%403x-80-1.jpg?resize=1024%2C1024&#038;ssl=1\" alt=\"\" class=\"wp-image-7217\" style=\"border-style:none;border-width:0px\" srcset=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/Octopus%403x-80-1.jpg?resize=1024%2C1024&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/Octopus%403x-80-1.jpg?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/Octopus%403x-80-1.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/Octopus%403x-80-1.jpg?resize=768%2C768&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/Octopus%403x-80-1.jpg?resize=1536%2C1536&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/Octopus%403x-80-1.jpg?w=1950&amp;ssl=1 1950w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/orcinus-orca%403x-80-1.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/orcinus-orca%403x-80-1.jpg?resize=1024%2C1024&#038;ssl=1\" alt=\"\" class=\"wp-image-7218\" srcset=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/orcinus-orca%403x-80-1.jpg?resize=1024%2C1024&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/orcinus-orca%403x-80-1.jpg?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/orcinus-orca%403x-80-1.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/orcinus-orca%403x-80-1.jpg?resize=768%2C768&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/orcinus-orca%403x-80-1.jpg?resize=1536%2C1536&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2026\/03\/orcinus-orca%403x-80-1.jpg?w=1950&amp;ssl=1 1950w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Qualche particolare:<\/p>\n\n\n\n<div class=\"wp-block-jetpack-slideshow aligncenter\" data-autoplay=\"true\" data-delay=\"3\" data-effect=\"slide\" style=\"--aspect-ratio:calc(851 \/ 849)\"><div class=\"wp-block-jetpack-slideshow_container swiper\"><ul class=\"wp-block-jetpack-slideshow_swiper-wrapper swiper-wrapper\"><li class=\"wp-block-jetpack-slideshow_slide swiper-slide\"><figure><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"851\" height=\"849\" alt=\"\" class=\"wp-block-jetpack-slideshow_image wp-image-6461\" data-id=\"6461\" data-aspect-ratio=\"851 \/ 849\" src=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/Screenshot-2025-05-30-082919.png?resize=851%2C849&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/Screenshot-2025-05-30-082919.png?w=851&amp;ssl=1 851w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/Screenshot-2025-05-30-082919.png?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/Screenshot-2025-05-30-082919.png?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/Screenshot-2025-05-30-082919.png?resize=768%2C766&amp;ssl=1 768w\" sizes=\"(max-width: 851px) 100vw, 851px\" \/><\/figure><\/li><li class=\"wp-block-jetpack-slideshow_slide swiper-slide\"><figure><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"867\" height=\"863\" alt=\"\" class=\"wp-block-jetpack-slideshow_image wp-image-6460\" data-id=\"6460\" data-aspect-ratio=\"867 \/ 863\" src=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/Screenshot-2025-05-30-082954.png?resize=867%2C863&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/Screenshot-2025-05-30-082954.png?w=867&amp;ssl=1 867w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/Screenshot-2025-05-30-082954.png?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/Screenshot-2025-05-30-082954.png?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/Screenshot-2025-05-30-082954.png?resize=768%2C764&amp;ssl=1 768w\" sizes=\"(max-width: 867px) 100vw, 867px\" \/><\/figure><\/li><li class=\"wp-block-jetpack-slideshow_slide swiper-slide\"><figure><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"968\" height=\"897\" alt=\"\" class=\"wp-block-jetpack-slideshow_image wp-image-7151\" data-id=\"7151\" data-aspect-ratio=\"968 \/ 897\" src=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/octopus-detail1.png?resize=968%2C897&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/octopus-detail1.png?w=968&amp;ssl=1 968w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/octopus-detail1.png?resize=300%2C278&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/octopus-detail1.png?resize=768%2C712&amp;ssl=1 768w\" sizes=\"(max-width: 968px) 100vw, 968px\" \/><\/figure><\/li><li class=\"wp-block-jetpack-slideshow_slide swiper-slide\"><figure><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"961\" height=\"895\" alt=\"\" class=\"wp-block-jetpack-slideshow_image wp-image-7150\" data-id=\"7150\" data-aspect-ratio=\"961 \/ 895\" src=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/octopus-detail2.png?resize=961%2C895&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/octopus-detail2.png?w=961&amp;ssl=1 961w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/octopus-detail2.png?resize=300%2C279&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/octopus-detail2.png?resize=768%2C715&amp;ssl=1 768w\" sizes=\"(max-width: 961px) 100vw, 961px\" \/><\/figure><\/li><li class=\"wp-block-jetpack-slideshow_slide swiper-slide\"><figure><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"870\" height=\"876\" alt=\"\" class=\"wp-block-jetpack-slideshow_image wp-image-7148\" data-id=\"7148\" data-aspect-ratio=\"870 \/ 876\" src=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/orcinus-orca-detail2.png?resize=870%2C876&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/orcinus-orca-detail2.png?w=870&amp;ssl=1 870w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/orcinus-orca-detail2.png?resize=298%2C300&amp;ssl=1 298w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/orcinus-orca-detail2.png?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/orcinus-orca-detail2.png?resize=768%2C773&amp;ssl=1 768w\" sizes=\"(max-width: 870px) 100vw, 870px\" \/><\/figure><\/li><li class=\"wp-block-jetpack-slideshow_slide swiper-slide\"><figure><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"876\" height=\"881\" alt=\"\" class=\"wp-block-jetpack-slideshow_image wp-image-7147\" data-id=\"7147\" data-aspect-ratio=\"876 \/ 881\" src=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/orcinus-orca-detail1.png?resize=876%2C881&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/orcinus-orca-detail1.png?w=876&amp;ssl=1 876w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/orcinus-orca-detail1.png?resize=298%2C300&amp;ssl=1 298w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/orcinus-orca-detail1.png?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/orcinus-orca-detail1.png?resize=768%2C772&amp;ssl=1 768w\" sizes=\"(max-width: 876px) 100vw, 876px\" \/><\/figure><\/li><\/ul><a class=\"wp-block-jetpack-slideshow_button-prev swiper-button-prev swiper-button-white\" role=\"button\"><\/a><a class=\"wp-block-jetpack-slideshow_button-next swiper-button-next swiper-button-white\" role=\"button\"><\/a><a aria-label=\"Pause Slideshow\" class=\"wp-block-jetpack-slideshow_button-pause\" role=\"button\"><\/a><div class=\"wp-block-jetpack-slideshow_pagination swiper-pagination swiper-pagination-white\"><\/div><\/div><\/div>\n\n\n\n<h1 class=\"wp-block-heading\">Nota tecnica<\/h1>\n\n\n\n<div class=\"wp-block-group has-accent-1-background-color has-background has-global-padding is-layout-constrained wp-container-core-group-is-layout-34a480d6 wp-block-group-is-layout-constrained\" style=\"padding-top:var(--wp--preset--spacing--20);padding-right:var(--wp--preset--spacing--20);padding-bottom:var(--wp--preset--spacing--20);padding-left:var(--wp--preset--spacing--20)\">\n<h2 class=\"wp-block-heading\">Cos&#8217;\u00e8 la retinatura o <em>halftone<\/em><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La <strong>retinatura<\/strong> \u00e8 una tecnica fotografica fondamentale per l&#8217;industria grafica, utilizzata per <strong>simulare le variazioni di chiaroscuro<\/strong> tipiche delle immagini a tono continuo (come le fotografie) durante la stampa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Poich\u00e9 i processi di stampa comuni utilizzano inchiostro di un solo colore (solitamente il nero) e non possono riprodurre direttamente diverse intensit\u00e0 di colore, la retinatura permette di superare questo limite &#8220;ricostruendo&#8221; l&#8217;immagine attraverso una trama di <strong>puntini di dimensioni variabili<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Come vengono simulate le sfumature di grigio<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Il processo di simulazione si basa sui seguenti principi:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Dimensione variabile dei punti<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">L&#8217;immagine originale viene suddivisa in una griglia di unit\u00e0 chiamate &#8220;celle dei retinati&#8221;. All&#8217;interno di ogni cella, viene creato un punto il cui <strong>rapporto tra area inchiostrata e area vuota<\/strong> corrisponde al livello di grigio o alla luminosit\u00e0 dell&#8217;immagine originale in quel punto.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nelle zone pi\u00f9 <strong>scure<\/strong>, i punti sono pi\u00f9 grandi e coprono quasi tutta la superficie della cella.<\/li>\n\n\n\n<li>Nelle zone pi\u00f9 <strong>chiare<\/strong>, i punti sono molto piccoli, lasciando prevalere il bianco della carta.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Percezione dell&#8217;occhio umano<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Il sistema funziona grazie a un limite della vista umana. Da una distanza sufficiente, l&#8217;occhio non riesce a distinguere i singoli puntini, ma <strong>calcola la media<\/strong> tra il nero dell&#8217;inchiostro e il bianco del supporto cartaceo. Questa fusione ottica crea l&#8217;illusione di una sfumatura di grigio continua.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Retinatura digitale<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nelle tecnologie moderne, le stampanti emulano la cella della retinatura fotografica raggruppando piccoli pixel monocromatici (che possono essere solo &#8220;attivi&#8221; o &#8220;spenti&#8221;) per formare punti di dimensioni diverse, mantenendo l&#8217;illusione ottica della gradazione tonale.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Dimensione variabile dei punti<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">In sintesi, la retinatura trasforma un&#8217;immagine composta da sfumature infinite in un insieme di punti netti di inchiostro, che il nostro cervello interpreta nuovamente come ombre e luci.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Cos&#8217;\u00e8 l&#8217;<em>effetto Moir\u00e9<\/em><\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">L&#8217;effetto <strong>moir\u00e9<\/strong>, noto anche come <strong>marezzatura<\/strong>, \u00e8 uno sgradevole fenomeno visivo che si manifesta come una trama parassita o un&#8217;interferenza quando due o pi\u00f9 strutture geometriche regolari (come i retini di stampa) vengono sovrapposte con inclinazioni o lineature (la lineatura \u00e8 il parametro che definisce la <strong>finezza di un retino<\/strong>) non corrette.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ecco i dettagli principali su come si genera e come viene gestito:<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Cause dell&#8217;effetto moir\u00e9<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Sovrapposizione di retini:<\/strong> Il fenomeno \u00e8 causato dalla ripetuta sovrapposizione di punti di inchiostro che crea un disegno involontario sulla stampa. Questo accade tipicamente nella stampa a colori (CMYK), dove si utilizzano pi\u00f9 retini.<\/li>\n\n\n\n<li><strong>Differenze di angolazione:<\/strong> Il difetto \u00e8 particolarmente evidente quando le angolazioni dei retini divergono solo di <strong>2\u00b0 &#8211; 3\u00b0<\/strong>. Al contrario, una sfasatura di <strong>30\u00b0<\/strong> tra i retini permette di ottenere una trama regolare e pulita.<\/li>\n\n\n\n<li><strong>Scansione e ristampa:<\/strong> L&#8217;effetto moir\u00e9 viene spesso enfatizzato quando si scansiona e si ristampa un&#8217;immagine gi\u00e0 retinata, a causa dell&#8217;interferenza tra il vecchio retino e quello nuovo. Pu\u00f2 verificarsi anche durante il ridimensionamento digitale di immagini retinate (aliasing spaziale).<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">Soluzioni e prevenzione<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Inclinazione dei retini:<\/strong> Per evitare il moir\u00e9, l&#8217;industria grafica ha standardizzato l&#8217;uso di <strong>angoli specifici<\/strong> per i quattro colori di stampa (Ciano, Magenta, Giallo e Nero). Ad esempio, una combinazione comune prevede angoli come 15\u00b0, 75\u00b0, 0\u00b0 e 45\u00b0.<\/li>\n\n\n\n<li><strong>La &#8220;Rosetta&#8221;:<\/strong> Quando i retini sono angolati correttamente, i punti si combinano formando piccoli cerchi o strutture simmetriche chiamate <strong>rosette<\/strong>, che l&#8217;occhio percepisce come una sfumatura continua invece che come un&#8217;interferenza.<\/li>\n\n\n\n<li><strong>Retinatura FM (stocastica):<\/strong> L&#8217;uso della retinatura a modulazione di frequenza (FM), dove i micropunti sono disposti in modo casuale anzich\u00e9 su una griglia fissa, riduce drasticamente il rischio di moir\u00e9 rispetto alla retinatura tradizionale (AM).<\/li>\n\n\n\n<li><strong>Deretinatura (Descreening):<\/strong> In fase di scansione, si possono utilizzare algoritmi di &#8220;deretinatura&#8221; per ricostruire l&#8217;immagine a tono continuo originale, eliminando i motivi del retino prima di procedere a una nuova lavorazione.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In sintesi, la gestione precisa dell&#8217;<strong>angolo di inclinazione<\/strong> e della <strong>lineatura<\/strong> \u00e8 fondamentale per garantire una riproduzione pulita ed evitare che queste interferenze geometriche compromettano la qualit\u00e0 dell&#8217;immagine stampata.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Ho realizzato una serie di grafiche ispirate alla vita marina. Formato quadrato, colori e forme ben marcati.Ho voluto colorare ampie porzioni con la tecnica della retinatura (halftone). I testi si rapportano con la grafica scomponendosi in vari piani, suggerendo la profondit\u00e0 di campo e la tridimensionalit\u00e0. I contenuti sono ispirati dalle caratteristiche dei vari animali, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":7202,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[70,6,73],"tags":[],"class_list":["post-6458","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-design","category-grafica","category-tipografia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Vita marina, retini e effetto Moir\u00e9 - Marco Salmoiraghi<\/title>\n<meta name=\"description\" content=\"pesci molluschi e orche. 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Il primo obiettivo era la\u2026","rel":"","context":"In &quot;design&quot;","block_context":{"text":"design","link":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/category\/design\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/09\/scuola-svizzera-anni2000-2.jpg?fit=1140%2C760&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/09\/scuola-svizzera-anni2000-2.jpg?fit=1140%2C760&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/09\/scuola-svizzera-anni2000-2.jpg?fit=1140%2C760&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/09\/scuola-svizzera-anni2000-2.jpg?fit=1140%2C760&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/09\/scuola-svizzera-anni2000-2.jpg?fit=1140%2C760&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":3061,"url":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/2022\/11\/06\/n27-da-atipo-foundry\/","url_meta":{"origin":6458,"position":1},"title":"N27 da Atipo foundry","author":"Marco","date":"6 Novembre 2022","format":false,"excerpt":"Atipo foundry \u00e8 uno studio di design spagnolo creatore del carattere N27, che loro definiscono come \u201cThe first one avant-grotesk font family\u201d. Atipo foundry \u00e8 uno studio di design spagnolo. Tra i vari progetti e i vari caratteri creati ho trovato questo N27 che a mio avviso \u00e8 versatile, moderno\u2026","rel":"","context":"In &quot;design&quot;","block_context":{"text":"design","link":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/category\/design\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2022\/11\/N27-preview.png?fit=1004%2C300&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2022\/11\/N27-preview.png?fit=1004%2C300&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2022\/11\/N27-preview.png?fit=1004%2C300&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2022\/11\/N27-preview.png?fit=1004%2C300&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":5819,"url":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/2025\/05\/09\/il-la-rivista-piu-bella-del-mondo\/","url_meta":{"origin":6458,"position":2},"title":"IL &#8211; la rivista pi\u00f9 bella del mondo","author":"Marco","date":"9 Maggio 2025","format":false,"excerpt":"IL \u2013 Intelligence in Lifestyle era il mensile \"maschile\" di nuova concezione del Sole 24 Ore, centrato sugli avvenimenti internazionali, i protagonisti del cambiamento e l'attualit\u00e0 come chiave di comprensione del lifestyle globale. Il primo numero usc\u00ec il 19 settembre 2008. Era diretto da Christian Rocca (direttore responsabile) con Francesco\u2026","rel":"","context":"In &quot;grafica&quot;","block_context":{"text":"grafica","link":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/category\/grafica\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/05\/il-magazine-1.jpg?fit=830%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/05\/il-magazine-1.jpg?fit=830%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/05\/il-magazine-1.jpg?fit=830%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/05\/il-magazine-1.jpg?fit=830%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":3725,"url":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/2023\/09\/19\/alton-kelley-maestro-del-poster-psichedelico\/","url_meta":{"origin":6458,"position":3},"title":"Miti: Alton Kelley\/\/","author":"Marco","date":"19 Settembre 2023","format":false,"excerpt":"Alton Kelley maestro del poster psichedelico, contemporaneo di Wes Wilson, \u00e8 stato un altro di quei grafici che hanno cambiato lo stile e la storia di questa arte. Ispirato senza dubbio da Alphonse Mucha e Toulouse-Lautrec port\u00f2 la progettazione grafica del poster musicale ad un altro livello. Un grande maestro\u2026","rel":"","context":"In &quot;creativit\u00e0&quot;","block_context":{"text":"creativit\u00e0","link":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/category\/creativita\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2023\/09\/kelley-header.jpg?fit=1200%2C900&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2023\/09\/kelley-header.jpg?fit=1200%2C900&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2023\/09\/kelley-header.jpg?fit=1200%2C900&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2023\/09\/kelley-header.jpg?fit=1200%2C900&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2023\/09\/kelley-header.jpg?fit=1200%2C900&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":748,"url":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/2020\/12\/28\/montserrat-typeface\/","url_meta":{"origin":6458,"position":4},"title":"Montserrat typeface\/\/","author":"Marco","date":"28 Dicembre 2020","format":false,"excerpt":"Una breve analisi grafica su una delle mie famiglie di caratteri preferite, Montserrat, di Julieta Ulanowsky & Co. Per parlare di Montserrat bisogna prima introdurre un altro carattere, il Gotham, creato nel 2002 da Tobias Frere-Jones per la fonderia di Hoefler & Co. Mi sono innamorato del Gotham di quando\u2026","rel":"","context":"In &quot;grafica&quot;","block_context":{"text":"grafica","link":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/category\/grafica\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2020\/12\/montserrat-preview.png?fit=1200%2C900&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2020\/12\/montserrat-preview.png?fit=1200%2C900&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2020\/12\/montserrat-preview.png?fit=1200%2C900&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2020\/12\/montserrat-preview.png?fit=1200%2C900&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2020\/12\/montserrat-preview.png?fit=1200%2C900&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":1328,"url":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/2021\/07\/06\/john-alcorn-grafico-e-illustratore-stile-opere-e-influenza-nel-design\/","url_meta":{"origin":6458,"position":5},"title":"John Alcorn grafico e illustratore: stile, opere e influenza nel design","author":"Marco","date":"6 Luglio 2021","format":false,"excerpt":"Uno dei grafici pi\u00f9 riconoscibili della scena, un grande maestro, quasi italiano anzi quasi fiorentino (a Firenze ha vissuto e lavorato a lungo) che mi ha affascinato fin da piccolo. Un post che \u00e8 pi\u00f9 un pro-memoria che altro. Uno scritto su John Alcorn che ho trovato molto interessante e\u2026","rel":"","context":"In &quot;grafica&quot;","block_context":{"text":"grafica","link":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/category\/grafica\/"},"img":{"alt_text":"John Alcorn - logo per il film \"Amarcord\" di Federico Fellini","src":"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2021\/07\/JohnAlcornAmarcord_900.jpg?fit=900%2C707&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2021\/07\/JohnAlcornAmarcord_900.jpg?fit=900%2C707&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2021\/07\/JohnAlcornAmarcord_900.jpg?fit=900%2C707&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2021\/07\/JohnAlcornAmarcord_900.jpg?fit=900%2C707&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.marcosalmoiraghi.eu\/sandbox\/wp-content\/uploads\/2025\/06\/Screenshot-2026-03-19-163203.png?fit=1337%2C627&ssl=1","_links":{"self":[{"href":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/wp-json\/wp\/v2\/posts\/6458","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/wp-json\/wp\/v2\/comments?post=6458"}],"version-history":[{"count":33,"href":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/wp-json\/wp\/v2\/posts\/6458\/revisions"}],"predecessor-version":[{"id":7237,"href":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/wp-json\/wp\/v2\/posts\/6458\/revisions\/7237"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/wp-json\/wp\/v2\/media\/7202"}],"wp:attachment":[{"href":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/wp-json\/wp\/v2\/media?parent=6458"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/wp-json\/wp\/v2\/categories?post=6458"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.marcosalmoiraghi.eu\/sandbox\/wp-json\/wp\/v2\/tags?post=6458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}