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This enum is implemented in FRE for Windows.
ScanCompressionTypeEnum enumeration constants are used to specify modes of image compression after scanning. The compression type depends also on colority. 
typedef enum {
 SCT_NoCompression,
 SCT_CcittGroup3,
 SCT_CcittGroup4,
 SCT_JpegJfif
}ScanCompressionTypeEnum;

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Elements

NameDescription
SCT\_NoCompressionThe image is to be saved without any compression.
SCT\_CcittGroup3Black-and-white TIFF compression with CCITT Group 3.
SCT\_CcittGroup4Black-and-white TIFF compression with CCITT Group 4.
SCT\_JpegJfifGray or color TIFF compression with JPEG protocol (JFIF).

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Used in

IScanSourceSettings::CompressionType IScanSourceCapabilities::Compressions