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Image Formats



Below is a list of image formats that can be scanned to.

Format
Extension
File
Format
MultiPage/
Color-Gray
Support
Compression
Options
Advantages
Disadvantages
TIF Tagged Image File Format (TIFF) Yes/Yes CCITT
Group 4

CCITT
Group 3

Modified
Group 3

JBIG

Enhanced JBIG

JPEG

Packbits

ZIP

WANG JPEG

None
Handles black-and-white, grayscale, and color images well. Supports multiple images per file. Works across multiple platforms. Available in most commercial imaging applications. TIF with JBIG compression provides the best binary and grayscale file compression. TIFF with JPEG compression provides excellent color file compression. So flexible that many implementations are not complete, so TIFF files from one application may not be compatible with another application's implementation. Format also allows for private, undisclosed data field formats making certain implementations closed to other applications.
TIF Plexus TIFF No/Yes CCITT
Group 4

CCITT
Group 3

Modified
Group 3

Packbits

None
Compatibility with Plexus imaging systems. Only support a subset of the regular TIFF features.
PCX ZSoft PC Paintbrush No/Yes RLE Widely supported on PC platforms. Supports black-and-white, grayscale, palette color and 24-bit color images. Reasonably efficient storage of images with large areas of constarnt tone. Images are always compressed using run-length encoding. Run-length encoding is inefficient for storing typical scanned images. Produces files twice the size of TIFF packbits. Generally not supported on non-PC platforms.
DCX ZSoft PC Paintbrush FAX extension Yes/No RLE Same as PCX but black-and-white only. Supports multiple images per file. Same as PCX
BMPMicrosoft Windows Bitmap No/Yes None

RLE for some color formats
Wide support under Microsoft Windows. Handles black-and-white, grayscale, palette color and 24-bit color images. Poor support outside of Windows. Poor support of compressed files. Does not support multiple images per file.
JBG JBIG No/Gray JBIG

Enhanced JBIG
Excellent binary and grayscale compression. No support for color. Not widely supported at this time.
JPG JPEG JIFF No/Yes JPEG By far the best compression for photographic images. Many incompatible implementations. Lossy, meaning that color and image data is discarded to save storage space at the expense of image qualities that typically are below the threshold of human vision.
PDA Calera Processed Document Architecture No/No CCITT
Group 4

CCITT
Group 3

None
Single file format can contain bitmap image data or text. Very good compression is possible. Very little support other than Caere applications (WordScan, M/Series Professional). No color support. (Developed for OCR applications.)
PDF Portable Document Format (Adobe Acrobat) Yes/Yes CCITT
Group 4

CCITT
Group 3

ZIP
Compatibility with Adobe Acrobat. Different types of the PDF files can be easily confused.
PNG Portable Network Graphics No/Yes ZIP May become a replacement for GIF as the standard web graphics format. Superior to GIF because it also supports binary and 24-bit color. Not widely supported at this time.
MDA IBM MO:DCA Yes/Yes CCITT
Group 4

JPEG

None
Compatibility with IBM imaging systems.

Binary images can acheive a compression ratio of a 35:1 to 50:1 compression ratio, depending on the characteristics of the image.



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