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ImageWorld LLC
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TIFF (Tag Image File Format)
An industry standard image file format. TIFF is a flexible and adaptable file format. It can handle multiple images and data in a single file through the inclusion of “tags” in the file header. Tags can indicate the basic geometry of the image, such as its size, or define how the image data is arranged and whether various image compression options are used.
http://www.imageworldllc.com/document-glossary-of-terms/

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Thumbnails
A reproduction of an image reduced in size and quality to permit quick perusal of an or several images usually so that a specific image can be selected for closer inspection.
http://www.imageworldllc.com/document-glossary-of-terms/

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Scanner
A device that applies light to paper page sampling and digitally recording the presence or absence of marks. Depending upon the device sampling and recording can be black and white, grayscale or color. Modern high-performance scanners are capable of over 300 pages per minute. Most commercial grade scanners augment their inherent sampling and image processing capability through hardware and software on an attached computer.
http://www.imageworldllc.com/document-glossary-of-terms/

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Resolution
When applied to images resolution is simply the amount of detail in an image. For print output and often scanned input resolution is defined as dots per inch (dpi). Scanned input is more properly defined as samples per inch (SPI) which is a measure of the number of points used when the scan is performed versus the data storage format of dpi. PC monitor or display resolution is commonly stated as Pixels per Inch of PPI. An absolute maxim is the higher the resolution the larger the file. Note: that file size to resolution is a geometric not linear progression.
http://www.imageworldllc.com/document-glossary-of-terms/

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Pixel (Picture Element)
A single unit in an electronic image. This is not simply “dot” as in “dots per inch” a Pixel is a single unit or point in an image and data as to the color of that point. Color ranges from black and white to common PC displays offering up to 32 bits per pixel or over 16 million colors per Pixel.
http://www.imageworldllc.com/document-glossary-of-terms/

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PDF (Portable Document Format)
A file format developed by Adobe for used with their Acrobat product has become a standard for common file format. A PDF file can contain text, images, and graphics or a combination thereof. The Adobe Acrobat Reader is readily available free of charge there for providing an easy way for anyone to view an electronic file without regard for operating system or application software. The full Adobe Acrobat software suite creates PDF files and PDF forms (allowing on-line completion), security, and many other functions.
http://www.imageworldllc.com/document-glossary-of-terms/

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(Optical Mark Recognition)
Used primarily for structured forms this software process converts marks on a paper to information. An example is a form that is manually completed which includes check boxes the presence or absence of which is information.
http://www.imageworldllc.com/document-glossary-of-terms/

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OCR (Optical Character Recognition)
A software process that converts a all or a portion of a digital image into text. Accuracy has increased dramatically in the past few years but is still dependent upon factors such as quality of the original document, size of fonts, and the software application itself. Commercial grade OCR packages are dramatically more accurate and more expensive than those available for home or small business use. While differences in accuracy (from 94-95% to 98-99%) may seem small for a dramatic cost increase ($150 to thousands) the cost can be justified when one considers volume. 10,000 pages with an average of 400 words per page amounts to 4 million words or a potential reduction of 160,000 errors. The time savings proof reading is significant.
http://www.imageworldllc.com/document-glossary-of-terms/

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Lossless
A data compression algorithm that ensures no original data is lost during the compression process, often resulting in larger file sizes. Lossless compression becomes important when post processing of data could affect data quality. A prime example is photograph enlargement. If a portion of a photograph is used to create a new photograph that is then enlarged to be the same size as the original the effect of data loss may now become apparent to the naked eye.
http://www.imageworldllc.com/document-glossary-of-terms/
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