BTR

Full Name	Brooktrout
Format ID	IG_FORMAT_BRK = 3
File Extension(s)	.brk, .301,
Data Type	Raster image
Data Encoding	Binary
Color Profile Support	No
ImageGear Multipage Support	No
ImageGear Alpha Channel Support	No
ImageGear Platforms Support	WIN32, WIN64, Unix, Unix64, MAC, .NET, .NET64

ImageGear Supported Versions:

Version 1

ImageGear Supported Features:

IG_FLTR_DETECTSUPPORT - autodetect
IG_FLTR_PAGEREADSUPPORT - single page file reading
IG_FLTR_PAGEINSERTSUPPORT - single-page file writing

ImageGear Read Support:

IG_COMPRESSION_CCITT_G3 - Indexed RGB: 1 bpp
IG_COMPRESSION_CCITT_G32D - Indexed RGB: 1 bpp

ImageGear Write Support:

IG_COMPRESSION_CCITT_G3 - Indexed RGB: 1 bpp
IG_COMPRESSION_CCITT_G32D - Indexed RGB: 1 bpp

When saving an image, the image must have horizontal resolution of 200 DPI and vertical resolution of 100 or 200 DPI.

ImageGear Filter Control Parameters:

Filter Control Parameter	Type	Default Value	Available Values	Description
COMPRESSION	WORD	BTR_COMP_G3	BTR_COMP_G3BTR_COMP_G3_2D	Compression for saving.

Comments:

A Brooktrout file consists of a CCITT Group 3 (G3) compressed file with a 128-byte header designed by Brooktrout Technology. The header fields include a constant that identifies the file as Brooktrout, a version number, the horizontal and vertical resolutions of the image in dots/mm, the number of bits per pixel, and the number of pixels per line.