Canon D1250U2F - CanoScan USB Flatbed Scanner User Manual

Also see for D1250U2F - CanoScan USB Flatbed Scanner: Specifications Quick start guide User guide

Contents

w w w ww w37AppendicesContents Index Previous View Next View Previous Page Next PageYou can select the format of the files in which scanned images aresaved by the Toolbox. This topic explains the various characteristicsof the different file formats.■ BMP FileThis is the standard Windows bitmap file format. It issupported by most Windows application programs. Thisformat is frequently selected when an image file willonly be used in a Windows environment. The “.bmp”file name extension is generally assigned to this format.■ JPEG FileThis is the image format specified by the InternationalOrganization for Standardization’s (ISO’s) JointPhotographic Experts Group (JPEG). This format’scompression ratio is its outstanding feature. It cancompress data anywhere from 1/10 to 1/50 its originalvolume. However, it utilizes an irreversible “lossy”compression technique that loses part of the dataduring compression. Thus, the file cannot be restored toits original state and is slightly degraded in quality. Ifyou repeatedly open, edit and save a JPEG file, the lossof quality will become more noticeable. The “.jpg” filename extension is generally assigned to this format. Thisformat cannot be selected when the Image Type is set toBlack and White.File Formats■ PNG FileThe Portable Network Graphics (PNG) format isgradually gaining wide acceptance as an image fileformat for web sites (Internet). Images are saved in acompressed state, but it is a reversible compression sothat the image quality remains unchanged when filesare repeatedly opened, edited and saved. The “.png”file name extension is generally assigned to this format.■ TIFF FileThe Tagged Image File Format (TIFF) features a highdegree of compatibility between the various computerplatforms and application programs. Data called a tag isadded to the start of the file, which allows the file to beexpanded. However, this characteristic sometimes causesthe file to contain incompatible data. The “.tif” filename extension is generally assigned to this format.

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