HP d640 HP D640 High-Volume Printer - Enhanced Features Manual, C5620-90027 - Page 40

baseline TIFF, extended TIFF, Baseline TIFF definitions

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Baseline TIFF definitions * Compression Compression scheme used for the image data. The following 0103,Short,1 compression modes are supported by the D640 printer: baseline TIFF 1 = No compression. Data packed tightly into bytes, but not spanning row boundaries. This is the default. 2 = CCCIT Group 3, 1-dimensional, modified Huffman run- length encoding. 32773 = PackBits compression. A byte-oriented, run-length encoding scheme. extended TIFF 3 = T4-encoding (Group 3, 2-dimensional). CCITT T.4 bi- level encoding (Geneva: 1988). 4 = T6-encoding (Group 4). CCITT T.6 bi-level encoding (Geneva: 1988). Copyright Copyright notice. 8298,ASCII DateTime Date and time in the following format: YYYY:MM:DD HH:MM:SS 0132,ASCII,20 A null (binary zero) terminates the string. ExtraSamples Description of extra components. 0152,Short,m * FillOrder The logical order of bits within a byte. 010A,Short,1 Default =1 For value 1, pixels with low column values are stored in highorder bits of the byte. The most significant bit in a byte is the earliest in the raster line for uncompressed data as well as the earliest in compression code for compressed data. For value 2, pixels with low column values are stored in low-order bits of the byte. Both values are supported, but Hewlett-Packard recommends using FillOrder=1 for performance. 36 Chapter 3: Technical Reference

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36
Chapter 3: Technical Reference
* Compression
0103,Short,1
Compression scheme used for the image data. The following
compression modes are supported by the D640 printer:
baseline TIFF
1 =
No compression. Data packed tightly into bytes, but not
spanning row boundaries. This is the default.
2 =
CCCIT Group 3, 1-dimensional, modified Huffman run-
length encoding.
32773 =
PackBits compression. A byte-oriented, run-length
encoding scheme.
extended TIFF
3 =
T4-encoding (Group 3, 2-dimensional). CCITT T.4 bi-
level encoding (Geneva: 1988).
4 =
T6-encoding (Group 4). CCITT T.6 bi-level encoding
(Geneva: 1988).
Copyright
8298,ASCII
Copyright notice.
DateTime
0132,ASCII,20
Date and time in the following format: YYYY:MM:DD HH:MM:SS
A null (binary zero) terminates the string.
ExtraSamples
0152,Short,m
Description of extra components.
* FillOrder
010A,Short,1
The logical order of bits within a byte.
Default =1
For value 1, pixels with low column values are stored in high-
order bits of the byte. The most significant bit in a byte is the
earliest in the raster line for uncompressed data as well as the
earliest in compression code for compressed data.
For value 2, pixels with low column values are stored in low-order
bits of the byte.
Both values are supported, but Hewlett-Packard recommends
using FillOrder=1 for performance.
Baseline TIFF definitions