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Image scaling can be interpreted as a form of image resampling or image reconstruction from the view of the Nyquist sampling theorem.According to the theorem, downsampling to a smaller image from a higher-resolution original can only be carried out after applying a suitable 2D anti-aliasing filter to prevent aliasing artifacts.
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.
A PCWorld magazine review of version 4.0 of FastStone Image Viewer in 2011 noted the software's "lightning-fast" display of pictures. The reviewer felt that one of its greatest advantages was its "wide variety of file formats" the software supports. [9]
Yes Filenames, file creation/modification date, Exif date taken, GPS timestamp FastStone Image Viewer: Yes Yes Yes 1:1, 2%-5000% magnifier, click-and-hold zooming, fit width and/or height, lock No Yes 6 predefined sizes Yes database dir-tree, back and forth navigation, bookmarks Yes Yes user-defined, name, date, file size, image size, type ...
Some digital file formats record a DPI value, or more commonly a PPI (pixels per inch) value, which is to be used when printing the image. This number lets the printer or software know the intended size of the image, or in the case of scanned images , the size of the original scanned object.
Data in a RAW-file is structured according to the Bayer filter's pattern in cameras that use a single image sensor. Debayering, the process of obtaining bitmap data from a RAW-image is always a lossy operation. [citation needed] In addition, some downsampling is always performed, again reducing image information.
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