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Sonstiges >> Off Topic > phyton??? o.0

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|LR|Cooper

19.11.2011 um 20:53

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Clan: Dumme Dorfbauern
Postings: 885

Mal ne Frage an die Cracks hier im Verein oder auch sonst wo... kann jemand von euch Phyton programmieren? Hab hier folgende Aufgabe und kein Plan:

Video-Konverter haben die Aufgabe, Einzelbilder eines Videodatenstroms einzulesen und in ein anderes
Format zu transportieren. Beispielsweise kann ein unkomprimiertes Video als Quelle dienen welches
dann in ein MPG-Video gewandelt wird. Zu Beginn m¨ussen diese Konverter-Programme oftmals eine
Farbraumtransformation vornehmen. In dieser Aufgabe sollen RGB-Einzelbilder in den YUV-Farbraum
konvertiert werden.
Schreiben Sie hierzu ein Python-Programm welches ein BMP-Bild (im RGB-Modus) einlesen kann und
zeilenweise die Farbwerte der einzelnen Pixel in RGB ausgibt. Berechnen Sie nun f¨ur die einzelnen Pixel
die YUV-Werte und geben Sie diese ebenfalls aus.
Benutzen Sie dazu folgende N¨aherung:
y = r * 0:299000 + g * 0:587000 + b * 0:114000
u = r * -0:168736 + g * -0:331264 + b * 0:500000 + 128
v = r * 0:500000 + g * -0:418688 + b * -0:081312 + 128
Was bewirkt der Summand 128?

Jemand der sich auskennt und helfen kann?
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dotDatabase::select -> database: d030eee4 0.002651 - dotDatabase::query -> UPDATE session SET lastactivity = 1782213390, userid = 0, site = 'https://lanrena.christoph-raible.de/forum/thread/1237/', host = '216.73.217.60', dns = '216.73.217.60', countrycode = 'US', hits = hits + 1 WHERE hash = 'd8b6af97c4a9d81ad458220484b63f2f' 0.002860 - dotSession::start -> session found in DB 0.002867 - dotSession::load_locales -> do 0.002886 - dotSession::load_locales -> chosing language for locales: de_DE.UTF-8 0.002892 - dotSession::start -> ---- finished with session startup 0.002926 - dotSession::load_user -> id: 0 0.002931 - user::get_user -> id: >0< 0.002938 - dotDatabase::getInstance -> connection: database 0.002967 - dotCommon::classload -> require: /www/htdocs/w00f1046/includes/class.styles.php 0.003210 - styles::load -> name: >< 0.003226 - styles::load -> include: /www/htdocs/w00f1046/html/styles/lanrenav3.php 0.003521 - styles::activate -> style = lanrenav3 0.003616 - dotCommon::classload -> require: /www/htdocs/w00f1046/includes/class.admin.php 0.003783 - 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dotDatabase::query -> SELECT `code`, `smily` FROM html_smilies ORDER by LENGTH(code) DESC 0.008835 - dotDatabase::query -> SELECT codetag, codereplacement, twoparams FROM html_code 0.008887 - HTML::encode -> replace run 1 0.008941 - HTML::encode -> replace run 2 0.008987 - HTML::template -> template: >forum_postingpart< 0.009049 - HTML::template -> template: >forum_postingindex< 0.009092 - FORUM::showthread -> check for moderator utils 0.009099 - FORUM::update_visit -> forumid: 6 threadid: 1237 posttime: 2011-11-19 20:53:42 0.009120 - GLOBAL::end userspace -> --------------------------------------------- 0.009124 - PAGE::render -> start rendering page layout 0.009128 - USER::check_for_new_messages -> return 0.009135 - dotSession::getInstance -> do 0.009152 - PAGE::get_boxes -> -------- side=left 0.009162 - dotCommon::classload -> require: /www/htdocs/w00f1046/includes/class.cbox.php 0.009849 - PAGE::get_boxes -> -------- call: left::menu_main 0.009861 - CBOX::menu -> generate Menu Box >news< 0.009871 - HTML::template -> template: >box_menu< 0.009921 - HTML::template_exists -> search: >page_box_left< == 1 0.009937 - HTML::template -> template: >page_box_left< 0.009971 - PAGE::get_boxes -> -------- call: left::menu_site 0.009979 - CBOX::menu -> generate Menu Box >site< 0.009988 - HTML::template -> template: >box_menu_bit< 0.010018 - HTML::template -> template: >box_menu_bit< 0.010031 - HTML::template -> template: >box_menu_bit< 0.010042 - HTML::template -> template: >box_menu_bit< 0.010052 - HTML::template -> template: >box_menu_bit< 0.010062 - HTML::template -> template: >box_menu_bit< 0.010071 - HTML::template -> template: >box_menu< 0.010089 - HTML::template_exists -> search: >page_box_left< == 1 0.010102 - HTML::template -> template: >page_box_left< 0.010115 - PAGE::get_boxes -> -------- call: left::menu_verein 0.010121 - CBOX::menu -> generate Menu Box >verein< 0.010130 - HTML::template -> template: >box_menu_bit< 0.010141 - HTML::template -> template: >box_menu_bit< 0.010151 - HTML::template -> template: >box_menu_bit< 0.010160 - HTML::template -> template: >box_menu_bit< 0.010170 - HTML::template -> template: >box_menu_bit< 0.010179 - HTML::template -> template: >box_menu< 0.010195 - HTML::template_exists -> search: >page_box_left< == 1 0.010207 - HTML::template -> template: >page_box_left< 0.010220 - PAGE::get_boxes -> -------- call: left::menu_event 0.010226 - CBOX::menu -> generate Menu Box >event< 0.010234 - HTML::template -> template: >box_menu_bit< 0.010244 - HTML::template -> template: >box_menu_bit< 0.010254 - HTML::template -> template: >box_menu_bit< 0.010264 - HTML::template -> template: >box_menu_bit< 0.010274 - HTML::template -> template: >box_menu_bit< 0.010283 - HTML::template -> template: >box_menu_bit< 0.010293 - HTML::template -> template: >box_menu_bit< 0.010302 - HTML::template -> template: >box_menu_bit< 0.010312 - HTML::template -> template: >box_menu_bit< 0.010321 - HTML::template -> template: >box_menu< 0.010337 - HTML::template_exists -> search: >page_box_left< == 1 0.010348 - HTML::template -> template: >page_box_left< 0.010361 - PAGE::get_boxes -> -------- call: left::menu_login 0.010367 - CBOX::menu -> generate Menu Box >login< 0.010379 - HTML::template -> template: >box_menu_bit< 0.010392 - HTML::template -> template: >box_menu_bit< 0.010402 - HTML::template -> template: >box_menu< 0.010418 - HTML::template_exists -> search: >page_box_left< == 1 0.010429 - HTML::template -> template: >page_box_left< 0.010445 - PAGE::get_boxes -> -------- side=right 0.010455 - PAGE::get_boxes -> -------- call: right::party 0.010460 - CBOX::party -> generate Box 0.010467 - EVENT::short_event -> id >17< 0.010471 - EVENT::getevent -> id >17< 0.010476 - dotDatabase::query -> SELECT events.id, active, invite, password, events.name, anzahl, preis, konto, kontocheck, UNIX_TIMESTAMP(kontocheck) AS kontocheck_unix, event_location.name AS location, event_location.zip AS plz, event_location.city AS ort, event_location.street AS strasse, event_location.countrycode, location_id, map_template, allow_signoff, voraussetzung, minalter, turnier, netzwerk, weiteres, banner, UNIX_TIMESTAMP(begin) AS begin, UNIX_TIMESTAMP(end) AS end, UNIX_TIMESTAMP(signupbegin) AS sgbegin, UNIX_TIMESTAMP(signupend) AS sgend, UNIX_TIMESTAMP(seatreservebegin) AS seatbegin, UNIX_TIMESTAMP(seatreserveend) AS seatend, seatimage, UNIX_TIMESTAMP(canceled) AS canceled, archiv_gallery, archiv_media FROM events LEFT JOIN event_location ON event_location.id=location_id WHERE events.id=17 AND active=1 0.010584 - dotCommon::classload -> require: /www/htdocs/w00f1046/includes/class.cache.php 0.010735 - CACHE::get -> cache: >event_17::stats< found 0.010767 - HTML::template -> template: >box_event< 0.010832 - HTML::template_exists -> search: >page_box_right< == 1 0.010848 - HTML::template -> template: >page_box_right< 0.010888 - PAGE::get_boxes -> -------- call: right::forum 0.010896 - CBOX::forum -> generate forum box 0.010900 - CBOX::forum_load_threads -> load data 0.010910 - CACHE::get -> cache: >forum::topthreads< found 0.010969 - CBOX::forum_threads -> list all threads in array 0.010978 - FORUM::thread_lastvisit -> threadid: array ( 0 => 2510, 1 => 2509, 2 => 2499, 3 => 2502, 4 => 2508, 5 => 2507, 6 => 2506, 7 => 1919, 8 => 2505, 9 => 2485, 10 => 2503, 11 => 2501, 12 => 2500, 13 => 2496, 14 => 2498, 15 => 2497, 16 => 2495, 17 => 2493, 18 => 2494, 19 => 2445, ) 0.010990 - admin::getInstance -> do 0.011008 - HTML::template -> template: >box_forum_bit< 0.011064 - HTML::template -> template: >box_forum_bit< 0.011091 - HTML::template -> template: >box_forum_bit< 0.011118 - HTML::template -> template: >box_forum_bit< 0.011140 - HTML::template -> template: >box_forum_bit< 0.011164 - HTML::template -> template: >box_forum_bit< 0.011178 - HTML::template -> template: >box_forum< 0.011222 - HTML::template_exists -> search: >page_box_right< == 1 0.011236 - HTML::template -> template: >page_box_right< 0.011253 - PAGE::get_boxes -> -------- call: right::vote 0.011260 - CBOX::vote -> generate Box 0.011264 - dotDatabase::query -> SELECT v_id, UNIX_TIMESTAMP(v_ende) AS v_ende FROM vote_main WHERE v_start < NOW() AND v_ende > NOW() AND v_active=1 AND v_top=1 ORDER by v_start DESC 0.011416 - HTML::template -> template: >box_vote_nocurrent< 0.011455 - HTML::template_exists -> search: >page_box_right< == 1 0.011469 - HTML::template -> template: >page_box_right< 0.011484 - PAGE::get_boxes -> -------- call: right::banner 0.011497 - CACHE::get -> cache: >sponsoren_7::cbox_lanrenav3.de_DE< found 0.011522 - HTML::template_exists -> search: >page_box_right< == 1 0.011535 - HTML::template -> template: >page_box_right< 0.011551 - PAGE::get_boxes -> -------- call: right::search 0.011557 - CBOX::template -> generate Box with >box_suchen< as template 0.011561 - HTML::template -> template: >box_suchen< 0.011596 - HTML::template_exists -> search: >page_box_right< == 1 0.011608 - HTML::template -> template: >page_box_right< 0.011626 - PAGE::render -> final 0.011631 - PAGE::renderTemplate -> page 0.011636 - PAGE::getHead -> return 0.011639 - dotSession::getInstance -> do 0.011698 - HTML::template -> template: >page< 0.011805 - PAGE::render_template -> final PHP Includes : 19 DB Queries : 20 Rendering Time : 0.012125 Includes PHP Files: - /www/htdocs/w00f1046/forum/index.php - /www/htdocs/w00f1046/global.php - /www/htdocs/w00f1046/includes/class.dotCommon.php - /www/htdocs/w00f1046/config.php - /www/htdocs/w00f1046/includes/class.dotDatabase.php - /www/htdocs/w00f1046/includes/class.page.php - /www/htdocs/w00f1046/includes/class.dotSession.php - /www/htdocs/w00f1046/includes/class.user.php - /www/htdocs/w00f1046/includes/class.styles.php - /www/htdocs/w00f1046/html/styles/lanrenav3.php - /www/htdocs/w00f1046/includes/class.admin.php - /www/htdocs/w00f1046/includes/class.prvmsg.php - /www/htdocs/w00f1046/includes/class.event.php - /www/htdocs/w00f1046/includes/class.sitzplan.php - /www/htdocs/w00f1046/html/styles/lr.inc.php - /www/htdocs/w00f1046/includes/class.forum.php - /www/htdocs/w00f1046/includes/class.html.php - /www/htdocs/w00f1046/includes/class.cbox.php - /www/htdocs/w00f1046/includes/class.cache.php

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