Package ccitt implements a CCITT (fax) image decoder.
const AutoDetectHeight = -1
AutoDetectHeight is passed as the height argument to NewReader to indicate that the image height (the number of rows) is not known in advance.
DecodeIntoGray decodes the CCITT-formatted data in r into dst.
It returns an error if dst's width and height don't match the implied width and height of CCITT-formatted data.
NewReader returns an io.Reader that decodes the CCITT-formatted data in r. The resultant byte stream is one bit per pixel (MSB first), with 1 meaning white and 0 meaning black. Each row in the result is byte-aligned.
A negative height, such as passing AutoDetectHeight, means that the image height is not known in advance. A negative width is invalid.
Options are optional parameters.
Order specifies the bit ordering in a CCITT data stream.
SubFormat represents that the CCITT format consists of a number of sub-formats. Decoding or encoding a CCITT data stream requires knowing the sub-format context. It is not represented in the data stream per se.