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2. DjVu - Wikipedia

   en.wikipedia.org/wiki/DjVu

   To create a DjVu file, the initial image is first separated into three images: a background image, a foreground image, and a mask image. The background and foreground images are typically lower-resolution color images (e.g., 100 dpi); the mask image is a high-resolution bilevel image (e.g., 300 dpi) and is typically where the text is stored.

3. Image scanner - Wikipedia

   en.wikipedia.org/wiki/Image_scanner

   The file size of a scan can go up to about 100 MB for a 600 dpi, 23 × 28 cm (slightly larger than A4 paper) uncompressed 24-bit image. Scanned files must be transferred and stored. Scanners can generate this volume of data in a matter of seconds, making a fast connection desirable.

4. Image tracing - Wikipedia

   en.wikipedia.org/wiki/Image_tracing

   A person could look at the image, make some measurements, and then write the output file by hand. That was the case for the vectorization of a technical illustration about neutrinos. The illustration has a few geometric shapes and a lot of text; it was relatively easy to convert the shapes, and the SVG vector format allows the text (even ...

5. Mixed raster content - Wikipedia

   en.wikipedia.org/wiki/Mixed_raster_content

   The mask can be encoded in ITU T.4, JBIG1, or JBIG2, while the images can be JPEG, JBIG1, or run-length encoded color. The format is loosely based on JPEG, with a APP13 segment registered for this purpose. It is not known whether this file format is actually used, as formats like DjVu and PDF have their own ways of defining layers and masks. [2]

6. AOL Video - Serving the best video content from AOL and ...

   www.aol.com/video/view/how-to-clean-up-a-scanned...

   The AOL.com video experience serves up the best video content from AOL and around the web, curating informative and entertaining snackable videos.

7. JPEG - Wikipedia

   en.wikipedia.org/wiki/JPEG

   The most common filename extensions for files employing JPEG compression are .jpg and .jpeg, though .jpe, .jfif and .jif are also used. [46] It is also possible for JPEG data to be embedded in other file types – TIFF encoded files often embed a JPEG image as a thumbnail of the main image; and MP3 files can contain a JPEG of cover art in the ...