{"id":825,"date":"2014-05-29T22:47:25","date_gmt":"2014-05-30T02:47:25","guid":{"rendered":"http:\/\/blogs.library.duke.edu\/bitstreams\/?p=825"},"modified":"2014-05-29T23:25:51","modified_gmt":"2014-05-30T03:25:51","slug":"825","status":"publish","type":"post","link":"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/","title":{"rendered":"Digitization Details: Before We Push the \u201cScan\u201d Button"},"content":{"rendered":"

The Digital Production Center<\/a> at the Perkins Library has a clearly stated mission<\/a> to \u201ccreate digital captures of unique, valuable, or compelling primary resources for the purpose of preservation, access, and publication.\u201d\u00a0 Our mission statement goes on to say, \u201cOur operating principle is to achieve consistent results of a measurable quality. We plan and perform our work in a structured and scalable way, so that our results are predictable and repeatable, and our digital collections are uniform.\u201d<\/p>\n

That\u2019s a mouthful!<\/p>\n

\"TV0198\"<\/a><\/p>\n

What it means is the images have to be consistent not only from image to image within a collection but also from collection to collection over time.\u00a0 And if that isn\u2019t complex enough this has to be done using many different capture devices.\u00a0 Each capture device has its own characteristics, which record and reproduce color in different ways.<\/p>\n

How do we produce consistent images?<\/p>\n

There are many variables to consider when solving the puzzle of \u201cconsistent results of a measurable quality.\u201d\u00a0 First, we start with the viewing environment, then move to monitor calibration and profiling, and end with capture device profiling. \u00a0All of these variables play a part in producing consistent results.<\/p>\n

Full spectrum lighting is used in the Digital Production Center<\/a> to create a neutral environment for viewing the original material.\u00a0 Lighting that is not full spectrum often has a blue, magenta, green or yellow color shift, which we often don\u2019t notice because our eyes are able to adjust effortlessly.\u00a0 In the image below you can see the difference between tungsten lighting and neutral lighting.<\/p>\n

\"Tungsten<\/a>
Tungsten light (left) Neutral light (right)<\/figcaption><\/figure>\n

Our walls are also painted 18 percent gray, which is neutral, so that no color is reflected from the walls onto the image while comparing it to the digital image.<\/p>\n

Now that we have a neutral viewing environment,\u00a0the next variable to consider is the computer monitors used to view our digitized images.\u00a0 We use a spectrophotometer<\/a> (straight out of the Jetsons<\/a>, right?) made by xrite<\/a> to measure the color accuracy, luminance and contrast of the monitor.\u00a0 This hardware\/software combination uses the spectrophotometer as it\u2019s attached to the computer screen to read the brightness (luminance), contrast, white point and gamma of your monitor and makes adjustments for optimal viewing.\u00a0 This is called monitor calibration.\u00a0 The software then displays a series of color patches with known RGB values which the spectrophotometer measures and records the difference.\u00a0 The result is an icc display profile.\u00a0 This profile is saved to your operating system and is used to translate colors from what your monitor natively produces to a more accurate color representation.<\/p>\n

Now our environment is neutral and our monitor is calibrated and profiled.\u00a0 The next step in the process is to profile your capture device,\u00a0whether it is a high-end digital scan back like the Phase One<\/a> or BetterLight<\/a> or an overhead scanner like a Zeutschel<\/a>. From Epson<\/a> flatbed scanners to Nikon<\/a> slide scanners, all of these devices can be calibrated in the same way.\u00a0 With all of the auto settings on your scanner turned off, a color target is digitized on the device you wish to calibrate.\u00a0 The swatches on the color target are known values similar to the series of color patches used for profiling the monitor.\u00a0 The digitized target is fed to the profiling software.\u00a0 Each patch is measured and compared against its known value.\u00a0 The differences are recorded and the result is an icc device profile.<\/p>\n

Now that we have a neutral viewing environment for viewing the original material, our eyes don\u2019t need to compensate for any color shift from the overhead lights or reflection from the walls.\u00a0 Our monitors are calibrated\/profiled so that the digitized images display correctly and our devices are profiled so they are able to produce consistent images regardless of what brand or type of capture device we use.<\/p>\n

\"Gretag<\/a>
Gretag Macbeth color checker<\/figcaption><\/figure>\n

During our daily workflow we a Gretag Macbeth color checker to measure the output of the capture devices every day before we begin digitizing material to verify that the device is still working properly.<\/p>\n

All of this work is done before we push the \u201cscan\u201d button to ensure that our results are predictable and repeatable, measurable and scalable.\u00a0 Amen.<\/p>\n","protected":false},"excerpt":{"rendered":"

The Digital Production Center at the Perkins Library has a clearly stated mission to \u201ccreate digital captures of unique, valuable, or compelling primary resources for the purpose of preservation, access, and publication.\u201d\u00a0 Our mission statement goes on to say, \u201cOur operating principle is to achieve consistent results of a measurable quality. We plan and perform … Continue reading Digitization Details: Before We Push the \u201cScan\u201d Button<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":219,"featured_media":845,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,11,14],"tags":[],"class_list":["post-825","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-behindscenes","category-expertise","category-equipment"],"yoast_head":"\nDigitization Details: Before We Push the \u201cScan\u201d Button - Bitstreams: The Digital Collections Blog<\/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:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Digitization Details: Before We Push the \u201cScan\u201d Button - Bitstreams: The Digital Collections Blog\" \/>\n<meta property=\"og:description\" content=\"The Digital Production Center at the Perkins Library has a clearly stated mission to \u201ccreate digital captures of unique, valuable, or compelling primary resources for the purpose of preservation, access, and publication.\u201d\u00a0 Our mission statement goes on to say, \u201cOur operating principle is to achieve consistent results of a measurable quality. We plan and perform … Continue reading Digitization Details: Before We Push the \u201cScan\u201d Button →\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/\" \/>\n<meta property=\"og:site_name\" content=\"Bitstreams: The Digital Collections Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/dukedigitalcoll\" \/>\n<meta property=\"article:published_time\" content=\"2014-05-30T02:47:25+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2014-05-30T03:25:51+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.library.duke.edu\/bitstreams\/files\/2014\/05\/colorchecker_s.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"150\" \/>\n\t<meta property=\"og:image:height\" content=\"107\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Mike Adamo\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@dukedigitalcoll\" \/>\n<meta name=\"twitter:site\" content=\"@dukedigitalcoll\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Mike Adamo\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/\"},\"author\":{\"name\":\"Mike Adamo\",\"@id\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/#\/schema\/person\/d319d8a7f796a9d6a82d835ada994d31\"},\"headline\":\"Digitization Details: Before We Push the \u201cScan\u201d Button\",\"datePublished\":\"2014-05-30T02:47:25+00:00\",\"dateModified\":\"2014-05-30T03:25:51+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/\"},\"wordCount\":727,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/files\/2014\/05\/colorchecker_s.jpg\",\"articleSection\":[\"Behind the Scenes\",\"Digitization Expertise\",\"Equipment\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/\",\"url\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/\",\"name\":\"Digitization Details: Before We Push the \u201cScan\u201d Button - Bitstreams: The Digital Collections Blog\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/files\/2014\/05\/colorchecker_s.jpg\",\"datePublished\":\"2014-05-30T02:47:25+00:00\",\"dateModified\":\"2014-05-30T03:25:51+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/#\/schema\/person\/d319d8a7f796a9d6a82d835ada994d31\"},\"breadcrumb\":{\"@id\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/#primaryimage\",\"url\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/files\/2014\/05\/colorchecker_s.jpg\",\"contentUrl\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/files\/2014\/05\/colorchecker_s.jpg\",\"width\":150,\"height\":107},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Digitization Details: Before We Push the \u201cScan\u201d Button\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/#website\",\"url\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/\",\"name\":\"Bitstreams: The Digital Collections Blog\",\"description\":\"Notes from the Duke University Libraries Digital Projects Team\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/#\/schema\/person\/d319d8a7f796a9d6a82d835ada994d31\",\"name\":\"Mike Adamo\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/589fca5d163c87e57485ffdf0419a005dbd98275f3070b39e4d02fc04bcb03e8?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/589fca5d163c87e57485ffdf0419a005dbd98275f3070b39e4d02fc04bcb03e8?s=96&d=mm&r=g\",\"caption\":\"Mike Adamo\"},\"url\":\"https:\/\/blogs.library.duke.edu\/bitstreams\/author\/maa13duke-edu\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Digitization Details: Before We Push the \u201cScan\u201d Button - Bitstreams: The Digital Collections Blog","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/","og_locale":"en_US","og_type":"article","og_title":"Digitization Details: Before We Push the \u201cScan\u201d Button - Bitstreams: The Digital Collections Blog","og_description":"The Digital Production Center at the Perkins Library has a clearly stated mission to \u201ccreate digital captures of unique, valuable, or compelling primary resources for the purpose of preservation, access, and publication.\u201d\u00a0 Our mission statement goes on to say, \u201cOur operating principle is to achieve consistent results of a measurable quality. We plan and perform … Continue reading Digitization Details: Before We Push the \u201cScan\u201d Button →","og_url":"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/","og_site_name":"Bitstreams: The Digital Collections Blog","article_publisher":"https:\/\/www.facebook.com\/dukedigitalcoll","article_published_time":"2014-05-30T02:47:25+00:00","article_modified_time":"2014-05-30T03:25:51+00:00","og_image":[{"width":150,"height":107,"url":"https:\/\/blogs.library.duke.edu\/bitstreams\/files\/2014\/05\/colorchecker_s.jpg","type":"image\/jpeg"}],"author":"Mike Adamo","twitter_card":"summary_large_image","twitter_creator":"@dukedigitalcoll","twitter_site":"@dukedigitalcoll","twitter_misc":{"Written by":"Mike Adamo","Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/#article","isPartOf":{"@id":"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/"},"author":{"name":"Mike Adamo","@id":"https:\/\/blogs.library.duke.edu\/bitstreams\/#\/schema\/person\/d319d8a7f796a9d6a82d835ada994d31"},"headline":"Digitization Details: Before We Push the \u201cScan\u201d Button","datePublished":"2014-05-30T02:47:25+00:00","dateModified":"2014-05-30T03:25:51+00:00","mainEntityOfPage":{"@id":"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/"},"wordCount":727,"commentCount":0,"image":{"@id":"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/#primaryimage"},"thumbnailUrl":"https:\/\/blogs.library.duke.edu\/bitstreams\/files\/2014\/05\/colorchecker_s.jpg","articleSection":["Behind the Scenes","Digitization Expertise","Equipment"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/","url":"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/","name":"Digitization Details: Before We Push the \u201cScan\u201d Button - Bitstreams: The Digital Collections Blog","isPartOf":{"@id":"https:\/\/blogs.library.duke.edu\/bitstreams\/#website"},"primaryImageOfPage":{"@id":"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/#primaryimage"},"image":{"@id":"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/#primaryimage"},"thumbnailUrl":"https:\/\/blogs.library.duke.edu\/bitstreams\/files\/2014\/05\/colorchecker_s.jpg","datePublished":"2014-05-30T02:47:25+00:00","dateModified":"2014-05-30T03:25:51+00:00","author":{"@id":"https:\/\/blogs.library.duke.edu\/bitstreams\/#\/schema\/person\/d319d8a7f796a9d6a82d835ada994d31"},"breadcrumb":{"@id":"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/#primaryimage","url":"https:\/\/blogs.library.duke.edu\/bitstreams\/files\/2014\/05\/colorchecker_s.jpg","contentUrl":"https:\/\/blogs.library.duke.edu\/bitstreams\/files\/2014\/05\/colorchecker_s.jpg","width":150,"height":107},{"@type":"BreadcrumbList","@id":"https:\/\/blogs.library.duke.edu\/bitstreams\/2014\/05\/29\/825\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/blogs.library.duke.edu\/bitstreams\/"},{"@type":"ListItem","position":2,"name":"Digitization Details: Before We Push the \u201cScan\u201d Button"}]},{"@type":"WebSite","@id":"https:\/\/blogs.library.duke.edu\/bitstreams\/#website","url":"https:\/\/blogs.library.duke.edu\/bitstreams\/","name":"Bitstreams: The Digital Collections Blog","description":"Notes from the Duke University Libraries Digital Projects Team","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/blogs.library.duke.edu\/bitstreams\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/blogs.library.duke.edu\/bitstreams\/#\/schema\/person\/d319d8a7f796a9d6a82d835ada994d31","name":"Mike Adamo","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/blogs.library.duke.edu\/bitstreams\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/589fca5d163c87e57485ffdf0419a005dbd98275f3070b39e4d02fc04bcb03e8?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/589fca5d163c87e57485ffdf0419a005dbd98275f3070b39e4d02fc04bcb03e8?s=96&d=mm&r=g","caption":"Mike Adamo"},"url":"https:\/\/blogs.library.duke.edu\/bitstreams\/author\/maa13duke-edu\/"}]}},"_links":{"self":[{"href":"https:\/\/blogs.library.duke.edu\/bitstreams\/wp-json\/wp\/v2\/posts\/825","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.library.duke.edu\/bitstreams\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.library.duke.edu\/bitstreams\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.library.duke.edu\/bitstreams\/wp-json\/wp\/v2\/users\/219"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.library.duke.edu\/bitstreams\/wp-json\/wp\/v2\/comments?post=825"}],"version-history":[{"count":14,"href":"https:\/\/blogs.library.duke.edu\/bitstreams\/wp-json\/wp\/v2\/posts\/825\/revisions"}],"predecessor-version":[{"id":844,"href":"https:\/\/blogs.library.duke.edu\/bitstreams\/wp-json\/wp\/v2\/posts\/825\/revisions\/844"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.library.duke.edu\/bitstreams\/wp-json\/wp\/v2\/media\/845"}],"wp:attachment":[{"href":"https:\/\/blogs.library.duke.edu\/bitstreams\/wp-json\/wp\/v2\/media?parent=825"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.library.duke.edu\/bitstreams\/wp-json\/wp\/v2\/categories?post=825"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.library.duke.edu\/bitstreams\/wp-json\/wp\/v2\/tags?post=825"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}