{"id":7679,"date":"2022-09-09T23:14:33","date_gmt":"2022-09-09T17:44:33","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-reading-black-and-white-pixels-as-an-array-from-jpeg-in-c-and-c-closed\/"},"modified":"2022-09-09T23:14:33","modified_gmt":"2022-09-09T17:44:33","slug":"solved-reading-black-and-white-pixels-as-an-array-from-jpeg-in-c-and-c-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-reading-black-and-white-pixels-as-an-array-from-jpeg-in-c-and-c-closed\/","title":{"rendered":"[Solved] reading black and white pixels as an array from jpeg in c and c++ [closed]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-27496646\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"27496646\" data-parentid=\"27496554\" data-score=\"0\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>Let&#8217;s suppose you run with libjpeg. You&#8217;ll allocate a buffer and then call <code>jpeg_read_scanlines<\/code> a sufficient number of times to get all of your decompressed image data into memory. You can read scanlines (rows) individually and reformat them as needed. If the image is grayscale, the RGB values will all be equal, so you can just read one of them.<\/p>\n<p><a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/paulbourke.net\/libraries\/jpeg.c\">Paul Bourke&#8217;s site<\/a> has some pretty good usage examples of libjpeg.<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">2<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved reading black and white pixels as an array from jpeg in c and c++ [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Let&#8217;s suppose you run with libjpeg. You&#8217;ll allocate a buffer and then call jpeg_read_scanlines a sufficient number of times to get all of your decompressed image data into memory. You can read scanlines (rows) individually and reformat them as needed. If the image is grayscale, the RGB values will all be equal, so you &#8230; <a title=\"[Solved] reading black and white pixels as an array from jpeg in c and c++ [closed]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-reading-black-and-white-pixels-as-an-array-from-jpeg-in-c-and-c-closed\/\" aria-label=\"More on [Solved] reading black and white pixels as an array from jpeg in c and c++ [closed]\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[361,324,1192],"class_list":["post-7679","post","type-post","status-publish","format-standard","hentry","category-solved","tag-arrays","tag-c","tag-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] reading black and white pixels as an array from jpeg in c and c++ [closed] - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-reading-black-and-white-pixels-as-an-array-from-jpeg-in-c-and-c-closed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] reading black and white pixels as an array from jpeg in c and c++ [closed] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Let&#8217;s suppose you run with libjpeg. You&#8217;ll allocate a buffer and then call jpeg_read_scanlines a sufficient number of times to get all of your decompressed image data into memory. You can read scanlines (rows) individually and reformat them as needed. If the image is grayscale, the RGB values will all be equal, so you ... 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You&#8217;ll allocate a buffer and then call jpeg_read_scanlines a sufficient number of times to get all of your decompressed image data into memory. You can read scanlines (rows) individually and reformat them as needed. If the image is grayscale, the RGB values will all be equal, so you ... 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