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EN Color Printing Overview (Color LaserJet, 5, 5M, DeskJet) A-11
With proper calibration, any device can provide a transform from
device-independent color space to the device’s own color space,
producing output from different devices that have the same color
appearance. For example, if a monitor’s parameters are known
(gamma, gain, chromaticity coordinates for each primary, and the
white point), the monitor’s RGB pixel information can be transformed
into device-independent color.
The Color LaserJet printers provide device-independent color
specified using either the CIE L*a*b*, Colorimetric RGB, or
Luminance-Chrominance color spaces.
HP Color LaserJet 5 and 5M printers also provide device independent
color specified using either the CIE L*a*b*, Colorimetric RGB or
Luminance-Chrominance color spaces. However, HP Color
LaserJet 5 and 5M printers are somewhat restricted in what they
provide. Details of this can be found in Appendix D.
Color Matching
When attempting to match color produced by different devices, it is
important to know the difference between true color matching and
appearance matching.
Proper device calibration can achieve true color matching, so that a
side-by-side comparison of a printed page with the monitor on which
the page was designed will show an exact match. However, true color
matching is only satisfactory when using the monitor as a viewing
reference. Viewed away from the screen, the printed page may
appear flat and unsaturated because printers and monitors have
different dynamic ranges. For example, black on the screen appears
gray when compared to printed black, which is unacceptable if the
intent is pure black. Likewise, the white produced on a monitor screen
appears yellow or blue when compared to a white sheet of paper.
True color matching would require that gray be printed in the black
areas and colored dots be printed in the white areas.
- PCL 5 Color Technical 3
- Reference Manual 3
- Copyright and 4
- Trademarks 4
- Inside This Manual 5
- Manual Organization 6
- Related Documents 8
- Contents 9
- Chapter 5 The PCL Print Model 10
- Chapter 6 Raster Graphics 11
- DeskJet) 12
- Contents xii EN 14
- Color Printing 15
- Overview 15
- Working with color documents 16
- PCL 5 Color Concepts 17
- Green, Blue Color Space 18
- PCL 5 Color Graphics Context 20
- PCL 5 Color Mode 20
- Palettes and Color Selection 20
- PCL 5 Raster Images 21
- Pixels and Pixel Encoding 21
- Well-Behaved Raster 23
- EN Using Color Modes 2-9 33
- EN Using Color Modes 2-11 35
- 2-14 Using Color Modes EN 38
- EN Using Palettes 3-7 45
- Device CMY Palettes 52
- Screen Match 63
- ?*o3W (such 63
- ?*o3W843 ?*o3W643 63
- ?*o3W846 ?*o3W646 63
- Finish Mode Command 64
- The PCL Print Model 65
- ?*v#T) command. It 66
- EN The PCL Print Model 5-3 67
- The PCL Print Model 5-5 69
- Command Sequence 70
- ? * v # N 71
- ? * v # O 72
- Logical Operations 73
- Operators 74
- Operands 74
- Operation 74
- ?*l#O) provides 255 possible 75
- Interactions 76
- Logical Operation Command 77
- ROPs in the RGB Color Space 78
- ROPs in the CMY Color Space 79
- Using a ROP 80
- EN The PCL Print Model 5-17 81
- Table of Logical Operations 82
- EN The PCL Print Model 5-19 83
- EN The PCL Print Model 5-21 85
- EN The PCL Print Model 5-23 87
- Pixel Placement 88
- EN The PCL Print Model 5-25 89
- ?*l#R) and the HP-GL/2 Pixel 90
- Pixel Placement Command 91
- Filling with Patterns 92
- ? * c # G 93
- 5-30 The PCL Print Model EN 94
- Figure 5-7 Shading Patterns 94
- The PCL Print Model 5-31 95
- ? * v # T 96
- User-Defined Pattern Graphics 97
- The PCL Print Model 5-35 99
- Pattern Reference Point 100
- The PCL Print Model 5-37 101
- Download Pattern Command 102
- EN The PCL Print Model 5-39 103
- User-defined Pattern Example 104
- EN The PCL Print Model 5-41 105
- ? * p # R 107
- Pattern Control Command 108
- EN The PCL Print Model 5-45 109
- ? * c # A 110
- ? * c # H 110
- ? * c # B 111
- ? * c # V 111
- Fill Rectangular Area 112
- ? * c # P 112
- ?*v#T) command 113
- The PCL Print Model 5-51 115
- Rectangular Fill Examples 116
- The PCL Print Model 5-53 117
- Shaded Fill 118
- The PCL Print Model 5-55 119
- 5-56 The PCL Print Model EN 120
- Raster Graphics 121
- EN Raster Graphics 6-3 123
- PCL 5 Color Raster Graphics 124
- EN Raster Graphics 6-5 125
- EN Raster Graphics 6-7 127
- ? * t # R 128
- Raster Graphics 6-9 129
- ? * r # F 130
- EN Raster Graphics 6-11 131
- 6-12 Raster Graphics EN 132
- Source Raster Height Command 133
- ?*rC) command, the cursor 134
- Source Raster Width Command 135
- 6-16 Raster Graphics EN 136
- Start Raster Graphics Command 137
- Raster Y Offset Command 139
- Unencoded (Method 0) 141
- (Method 2) 141
- ?*b0m7WUUUUATT 143
- EN Raster Graphics 6-25 145
- Seed Row 146
- EN Raster Graphics 6-27 147
- ?*b3m2W(00000001)(11111111) 148
- ?*b2W(00000010)(11110000) 148
- EN Raster Graphics 6-29 149
- Empty Row 150
- Duplicate Row 150
- EN Raster Graphics 6-31 151
- Transfer Raster Data Commands 152
- Transfer Raster Data by Plane 153
- ?*b2m3W [binary data] 154
- End Raster Graphics Command 155
- Raster Scaling 156
- EN Raster Graphics 6-37 157
- Raster Graphics Example 158
- EN Raster Graphics 6-39 159
- Raster Graphics 6-41 161
- Color Raster Graphics Example 162
- 6-44 Raster Graphics EN 164
- Color Vector Graphics 165
- (HP-GL/2) 165
- Enter HP-GL/2 Mode 166
- ?%1B and ?%3B only) 168
- ?E or control panel reset): 168
- MC (Merge Control) 170
- PC (Pen Color) 178
- NP (Number of Pens) 181
- ?*r#U) or ?E 182
- CR (Color Range) 183
- PP (Pixel Placement) 184
- Figure 7-1 Pixel Placement 185
- PP, Pixel Placement Command 186
- (Color LaserJet, 5, 5M 187
- Color Concepts 189
- Black and White References 190
- Color Selection 191
- Pixel Encoding 192
- Encoding by Plane 192
- Color Modes 193
- Device-Dependent Color Spaces 194
- ?*t7J, ?*t8J) 195
- ?*t11J, ?*t12J) 195
- Device-Independent Color 196
- Color Matching 197
- Color Appearance Matching 198
- Color Lookup Tables 198
- Illumination Models 199
- Processing Color Documents 200
- Color Processing Functions 201
- Using Color Modes 203
- Introduction 204
- HP-GL/2 Imaging Mode 205
- Simple Color Mode 206
- Single Plane (value = 1) 207
- 3-Plane RGB (value = 3) 207
- 3-Plane CMY (value = –3) 207
- PCL Imaging Mode 208
- Common 6-Byte Header 209
- Byte 0 (Color Space) 209
- Byte 1 (Pixel Encoding Mode) 210
- Image Data) 217
- ?*v6W[0x04, . . . ] 218
- Data Range Scaling 218
- Device CMY (Long Form) 220
- CIE L*a*b* (Long Form) 220
- Colorimetric RGB (Long Form) 222
- ?*v#W) is shown as 227
- Device RGB or Device CMY 227
- Example: 227
- CIE L*a*b* 228
- Non-Linear Sony Trinitron 228
- Using Palettes 231
- Saving the Palette 233
- Palette Management by ID 235
- ?&p#S), Palette Control 236
- Select Palette Command 236
- ?&p#S 236
- ?&p44i6c44S 237
- Palette Control ID 238
- Palette Control 239
- Simple Color Palettes 241
- CID Color Palettes 243
- Bits/Index = 3 through 8 244
- Bits/Index = 1 245
- Bits/Index = 2 245
- HP-GL/2 Palettes 246
- Eight Pens 247
- Foreground Color 248
- ?*v#S) is issued: 249
- ?&b#M) immediately 249
- Programming Color Palettes 250
- Color Component Three 251
- Assign Color Index 251
- Modifying Output Color 253
- Halftone Render Algorithms 255
- Snap to Primaries 256
- Device Best Dither 256
- Error Diffusion 256
- Monochrome Rendering 257
- User-Defined Dithering 257
- User-Defined Dithers 258
- ?*m#W[data] 259
- Number of Planes 261
- Height and Width 261
- Data Bytes 261
- Multiple Dither Matrices 262
- Gamma Correction 269
- Viewing Illuminant 270
- Monochrome Printing 272
- Driver Configuration Command 273
- Lightness 274
- Saturation 274
- Select Treatment 274
- Download Color Map 276
- Index-1 279
- Index-2 EN 280
- Index-4 EN 282
- Index-6 EN 284
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