The ICompression property obtains the compression format of the current image or image being acquired. ICompression is available at runtime and is read-only. ICompression is available in the PreScan event and thereafter.

ICompression returns one of the following values:

• TWCP_NONE (0) No Compression, TWCP_NONE means that the image is in an uncompressed DIB format and should be accessed through the hDIB property.

• TWCP_PACKBITS (1) Packbits

• TWCP_ GROUP31D (2) Group 3 1D, Follows CCITT spec (no End Of Line)

• TWCP_GROUP31DEOL (3) Group 3 1D, Follows CCITT spec (has End Of Line)

• TWCP_GROUP32D (4) Group 3 2D, Follows CCITT spec (use cap for K Factor)

• TWCP_GROUP4 (5) Group 4, Follows CCITT spec

• TWCP_JPEG (6) JPEG, TWCP_JPEG means that the image is in a JPEG format and should be accessed through the hImage property.

Note: All other values mean that the image is in a TIFF format and should be accessed through the hImage property.

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