Material Types

dt has made a long term commitment to develop and expand ai crop until it handles most materials in an encyclopedic heritage collection that will, of course, take time here are a list of materials we do and do not currently support supported materials sheet the defining characteristic of this material type is that the subject is a single sheet of material the term "manuscript" or "loose" material might be used as a very loose synonym, but those carry more specific and narrow definitions examples manuscript page, page torn from a spiral notebook, map, poster, photographic print, vinyl record sleeve 2 up facing pages material that has two facing pages that are typically viewed together, but have separate places in the logical structure of the object, imaged open to 180º so both pages are captured at once ("2 up") the term "bound material" might be used as a very loose synonym, but some facing pages materials are folded (e g newspapers), or are loose sheets in storage but placed side by side for imaging in ai crop 2 up facing pages are automatically page split (unless include target in crop docid 2mhbg cfdthule6wxvyk5 is checked) and padding can be applied specifically to the gutter that means separate crops will be created for the left and right pages examples books, magazines, atlases, diaries, spiral bound notebooks, newspapers dt is very interested to expand support other related material such as trifold pamphlets, multi page fold outs, and other multi page materials please consider sharing images with dt docid 6yfcofsmxk4gawy6 wgdg of such materials if allowed, so we can work to provide such support known material limitations fanning/cover always included currently the model detects the imaged page(s), the fanning behind those pages (if any), and a partially visible cover (if any) however, at present the crop is always drawn based on the page, fanning, and cover combined we expect to provide options for excluding fanning/cover from the crop in future versions low margin backing paper pages with paper backing that is only slightly larger than the page will often result in mediocre crops we expect to improve performance in this regard in future versions high straightening angles the model is best at finding material that is mostly square to the frame – for example only requiring a few degrees of straightening we would love your feedback on whether supporting larger angles (e g material rotated 30º) is important vertical gutter only the image must be oriented such that the pages are on the left and right we would love your feedback on whether it's important to support horizontal gutters two pages only if more than two pages are found ai crop will fail the image in some cases stray objects in the frame may be detected as additional pages especially if they look like paper we would love your feedback on whether more than two pages should be supported examples unsupported materials 1 up facing pages (unsupported) material that has two facing pages that are typically viewed together, but have separate places in the logical structure of the object, imaged with the object partially open (e g 120º) such that only one page is captured straight on (the "imaged page"), with part or all of the other page (the "non imaged page") angled toward the camera ("1 up") the term "bound material" might be used as a very loose synonym, but some facing materials are folded (e g newspapers), or are loose sheets in storage but placed side by side for imaging 1 up facing pages are not currently supported in ai crop if they have a vertical gutter they will be incorrectly detected as 2 up facing pages such that an extra crop will be created for the non imaged page, and the precision of the crop will be lower than in supported material types dt is very interested to expand support to 1 up facing pages materials please consider sharing images with dt docid 6yfcofsmxk4gawy6 wgdg of such materials if allowed, so we can work to provide such support examples multiple items in one frame whether a grid of paper sheets, photos, or a series of stamps, multiple items in one frame are characterized by having more than 2 materials in the frame at the same time ai crop does not currently support more than two detected "pages" in the frame any frame that contains 3 or more detected pages will be failed dt is very interested to expand support for multiple items in one frame materials please consider sharing images with dt docid 6yfcofsmxk4gawy6 wgdg of such materials if allowed, so we can work to provide such support film, objects, and other unsupported material dt is very interested to expand support a wide range of non paper materials such as roll film, reel film, sheet film, glass plates, lantern slides, slide film, biological specimens, paintings, and other objects please consider sharing images with dt docid 6yfcofsmxk4gawy6 wgdg of such materials if allowed, so we can work to provide such support