123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188 |
- <!doctype html><!-- This is a valid HTML5 document. -->
- <!-- Screen readers, SEO, extensions and so on. -->
- <html lang="fr">
- <!-- Has to be within the first 1024 bytes, hence before the <title>
- See: https://www.w3.org/TR/2012/CR-html5-20121217/document-metadata.html#charset -->
- <meta charset="utf-8">
- <!-- Why no `X-UA-Compatible` meta: https://stackoverflow.com/a/6771584 -->
- <!-- The viewport meta is quite crowded and we are responsible for that.
- See: https://codepen.io/tigt/post/meta-viewport-for-2015 -->
- <meta name="viewport" content="width=device-width,initial-scale=1">
- <!-- Required to make a valid HTML5 document. -->
- <title>Chaîne de capture — David Larlet</title>
- <meta name="description" content="Pictures have always been a meaningful part of the human experience. From the first cave drawings, to sketches and paintings, to modern photography, we’ve mastered the art of recording what we see.">
- <!-- That good ol' feed, subscribe :). -->
- <link rel="alternate" type="application/atom+xml" title="Feed" href="/david/log/">
- <!-- Generated from https://realfavicongenerator.net/ such a mess. -->
- <link rel="apple-touch-icon" sizes="180x180" href="/static/david/icons2/apple-touch-icon.png">
- <link rel="icon" type="image/png" sizes="32x32" href="/static/david/icons2/favicon-32x32.png">
- <link rel="icon" type="image/png" sizes="16x16" href="/static/david/icons2/favicon-16x16.png">
- <link rel="manifest" href="/static/david/icons2/site.webmanifest">
- <link rel="mask-icon" href="/static/david/icons2/safari-pinned-tab.svg" color="#07486c">
- <link rel="shortcut icon" href="/static/david/icons2/favicon.ico">
- <meta name="msapplication-TileColor" content="#f0f0ea">
- <meta name="msapplication-config" content="/static/david/icons2/browserconfig.xml">
- <meta name="theme-color" content="#f0f0ea">
- <!-- Documented, feel free to shoot an email. -->
- <link rel="stylesheet" href="/static/david/css/style_2021-01-20.css">
- <!-- See https://www.zachleat.com/web/comprehensive-webfonts/ for the trade-off. -->
- <link rel="preload" href="/static/david/css/fonts/triplicate_t4_poly_regular.woff2" as="font" type="font/woff2" media="(prefers-color-scheme: light), (prefers-color-scheme: no-preference)" crossorigin>
- <link rel="preload" href="/static/david/css/fonts/triplicate_t4_poly_bold.woff2" as="font" type="font/woff2" media="(prefers-color-scheme: light), (prefers-color-scheme: no-preference)" crossorigin>
- <link rel="preload" href="/static/david/css/fonts/triplicate_t4_poly_italic.woff2" as="font" type="font/woff2" media="(prefers-color-scheme: light), (prefers-color-scheme: no-preference)" crossorigin>
- <link rel="preload" href="/static/david/css/fonts/triplicate_t3_regular.woff2" as="font" type="font/woff2" media="(prefers-color-scheme: dark)" crossorigin>
- <link rel="preload" href="/static/david/css/fonts/triplicate_t3_bold.woff2" as="font" type="font/woff2" media="(prefers-color-scheme: dark)" crossorigin>
- <link rel="preload" href="/static/david/css/fonts/triplicate_t3_italic.woff2" as="font" type="font/woff2" media="(prefers-color-scheme: dark)" crossorigin>
- <script>
- function toggleTheme(themeName) {
- document.documentElement.classList.toggle(
- 'forced-dark',
- themeName === 'dark'
- )
- document.documentElement.classList.toggle(
- 'forced-light',
- themeName === 'light'
- )
- }
- const selectedTheme = localStorage.getItem('theme')
- if (selectedTheme !== 'undefined') {
- toggleTheme(selectedTheme)
- }
- </script>
-
- <body class="remarkdown h1-underline h2-underline h3-underline em-underscore hr-center ul-star pre-tick" data-instant-intensity="viewport-all">
-
-
- <article>
- <header>
- <h1>Chaîne de capture</h1>
- </header>
- <nav>
- <p class="center">
- <a rel="prev" href="/david/2021/01/18/" title="Publication précédente : Textcasts">← Précédent</a> •
- <a href="/david/" title="Aller à l’accueil"><svg class="icon icon-home">
- <use xlink:href="/static/david/icons2/symbol-defs.svg#icon-home"></use>
- </svg> Accueil</a>
-
- </p>
- </nav>
- <hr>
-
-
- <blockquote lang="en">
- <p>Pictures have always been a meaningful part of the human experience. From the first cave drawings, to sketches and paintings, to modern photography, we’ve mastered the art of recording what we see.</p>
- <p><mark>Cameras and the lenses inside them may seem a little mystifying.</mark> In this blog post I’d like to explain not only how they work, but also how adjusting a few tunable parameters can produce fairly different results</p>
- <p><cite><em><a href="https://ciechanow.ski/cameras-and-lenses/">Cameras and Lenses</a></em> (<a href="/david/cache/2021/ef2067bf42482ed7c48e1d166cde117a/">cache</a>)</cite></p>
- </blockquote>
- <p>En ce moment, je creuse un peu quelles chaînes est-ce que je consens à supporter pour produire de la vidéo. Cela me fait découvrir et réviser des fondamentaux d’optique mais aussi de technique numérique. <strong>Il faut aujourd’hui comprendre les deux pour capter une image exploitable.</strong> Et je ne parle même pas (encore) de la post-production.</p>
- <p>C’est un cheminement plaisant car on part d’un « simple » reflet de lumière pour arriver à une complexité numérique incroyable. L’œil et le cerveau sont des organes assez fascinants vus sous cet angle (<em>pun intended</em>).</p>
-
- <blockquote lang="en">
- <p>To understand what makes it so special, the first half of this post explains how a digital camera develops a photo. Then we go on to explain the strengths and weaknesses of traditional RAWs. Finally, we dive into what’s unique about ProRAW, how it changes the game, and its few remaining drawbacks.</p>
- <p><cite><em><a href="https://blog.halide.cam/understanding-proraw-4eed556d4c54">Understanding ProRAW</a></em> (<a href="/david/cache/2021/0c6966a8e9543b52c361ac6de68f08e4/">cache</a>)</cite></p>
- </blockquote>
-
- <nav>
- <p class="center">
- <a rel="prev" href="/david/2021/01/18/" title="Publication précédente : Textcasts">← Précédent</a> •
- <a href="/david/2021/" title="Liste des publications récentes">↑ En 2021</a>
-
- </p>
- </nav>
- </article>
-
-
- <hr>
-
- <footer>
- <p>
- <a href="/david/" title="Aller à l’accueil"><svg class="icon icon-home">
- <use xlink:href="/static/david/icons2/symbol-defs.svg#icon-home"></use>
- </svg> Accueil</a> •
- <a href="/david/log/" title="Accès au flux RSS"><svg class="icon icon-rss2">
- <use xlink:href="/static/david/icons2/symbol-defs.svg#icon-rss2"></use>
- </svg> RSS</a> •
- <a href="http://larlet.com" title="Go to my English profile" data-instant><svg class="icon icon-user-tie">
- <use xlink:href="/static/david/icons2/symbol-defs.svg#icon-user-tie"></use>
- </svg> Pro</a> •
- <a href="mailto:david%40larlet.fr" title="Envoyer un courriel"><svg class="icon icon-mail">
- <use xlink:href="/static/david/icons2/symbol-defs.svg#icon-mail"></use>
- </svg> Email</a> •
- <abbr class="nowrap" title="Hébergeur : Alwaysdata, 62 rue Tiquetonne 75002 Paris, +33184162340"><svg class="icon icon-hammer2">
- <use xlink:href="/static/david/icons2/symbol-defs.svg#icon-hammer2"></use>
- </svg> Légal</abbr>
- </p>
- <template id="theme-selector">
- <form>
- <fieldset>
- <legend><svg class="icon icon-brightness-contrast">
- <use xlink:href="/static/david/icons2/symbol-defs.svg#icon-brightness-contrast"></use>
- </svg> Thème</legend>
- <label>
- <input type="radio" value="auto" name="chosen-color-scheme" checked> Auto
- </label>
- <label>
- <input type="radio" value="dark" name="chosen-color-scheme"> Foncé
- </label>
- <label>
- <input type="radio" value="light" name="chosen-color-scheme"> Clair
- </label>
- </fieldset>
- </form>
- </template>
- </footer>
- <script src="/static/david/js/instantpage-5.1.0.min.js" type="module"></script>
- <script>
- function loadThemeForm(templateName) {
- const themeSelectorTemplate = document.querySelector(templateName)
- const form = themeSelectorTemplate.content.firstElementChild
- themeSelectorTemplate.replaceWith(form)
-
- form.addEventListener('change', (e) => {
- const chosenColorScheme = e.target.value
- localStorage.setItem('theme', chosenColorScheme)
- toggleTheme(chosenColorScheme)
- })
-
- const selectedTheme = localStorage.getItem('theme')
- if (selectedTheme && selectedTheme !== 'undefined') {
- form.querySelector(`[value="${selectedTheme}"]`).checked = true
- }
- }
-
- const prefersColorSchemeDark = '(prefers-color-scheme: dark)'
- window.addEventListener('load', () => {
- let hasDarkRules = false
- for (const styleSheet of Array.from(document.styleSheets)) {
- let mediaRules = []
- for (const cssRule of styleSheet.cssRules) {
- if (cssRule.type !== CSSRule.MEDIA_RULE) {
- continue
- }
- // WARNING: Safari does not have/supports `conditionText`.
- if (cssRule.conditionText) {
- if (cssRule.conditionText !== prefersColorSchemeDark) {
- continue
- }
- } else {
- if (cssRule.cssText.startsWith(prefersColorSchemeDark)) {
- continue
- }
- }
- mediaRules = mediaRules.concat(Array.from(cssRule.cssRules))
- }
-
- // WARNING: do not try to insert a Rule to a styleSheet you are
- // currently iterating on, otherwise the browser will be stuck
- // in a infinite loop…
- for (const mediaRule of mediaRules) {
- styleSheet.insertRule(mediaRule.cssText)
- hasDarkRules = true
- }
- }
- if (hasDarkRules) {
- loadThemeForm('#theme-selector')
- }
- })
- </script>
- </body>
- </html>
|