HP 3800 HP Color LaserJet 3800 Printer - Software Technical Reference - Page 248

HP Digital Imaging, Contrast Enhancement, Digital Flash, SmartFocus, Smoothing, Automatic, Sharpness - scanner

Page 248 highlights

The HP Digital Imaging settings should be used only on high-resolution images (600 dpi or higher) that are printed on photograph-quality paper. These settings are not recommended for text. For the Contrast Enhancement, Digital Flash, SmartFocus, and Smoothing settings, the following controls are available: ● Automatic check box ● A slide bar ranging from Off to High The SharpFocus settings are Off and On. Use the following controls to enhance digital images: ● Contrast Enhancement. Use the Contrast Enhancement setting to increase image contrast for a more visually pleasing result. This filter is useful with flat images (images in which much of the image content is compressed into a small, dynamic range of pixel values). Flat images can result from low lighting, environmental haze, or camera or scanner limitations. ● Digital Flash. Use the Digital Flash setting to adjust lighting levels to reveal areas in shadow. The filter locates dark areas in an image and brings out detail without degrading other features in the image. ● Sharpness. Many images are improved by increasing their sharpness. Use the Sharpness feature to make edge detail more prominent. The filter detects regions that contain significant variations in pixel value along a number of different vectors (which denotes edges) and then applies a filter to enhance detail. ● SmartFocus. Use the SmartFocus setting to increase the apparent resolution of lower resolution images. Many images that are downloaded from the Internet or from digital cameras can be compressed because of size restrictions, and might exhibit pixilation artifacts when printed. SmartFocus upscales the image to the printer resolution without accentuating these artifacts. ● Smoothing. Just as many images benefit from increased sharpness, many images are improved by smoothing, which decreases noise artifacts that digital cameras or scanners often create. When you select Smoothing, the filter locates areas that contain abrupt changes in pixel value by comparison with surrounding pixels (which denotes noise) and then applies a filter to smooth the output. 224 Chapter 4 HP PCL 6, PCL 5, and PS emulation unidrivers for Windows ENWW

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
  • 234
  • 235
  • 236
  • 237
  • 238
  • 239
  • 240
  • 241
  • 242
  • 243
  • 244
  • 245
  • 246
  • 247
  • 248
  • 249
  • 250
  • 251
  • 252
  • 253
  • 254
  • 255
  • 256
  • 257
  • 258
  • 259
  • 260
  • 261
  • 262
  • 263
  • 264
  • 265
  • 266
  • 267
  • 268
  • 269
  • 270
  • 271
  • 272
  • 273
  • 274
  • 275
  • 276
  • 277
  • 278
  • 279
  • 280
  • 281
  • 282
  • 283
  • 284
  • 285
  • 286
  • 287
  • 288
  • 289
  • 290
  • 291
  • 292
  • 293
  • 294
  • 295
  • 296
  • 297
  • 298
  • 299
  • 300
  • 301
  • 302
  • 303
  • 304
  • 305
  • 306
  • 307
  • 308
  • 309
  • 310
  • 311
  • 312
  • 313
  • 314
  • 315
  • 316
  • 317
  • 318
  • 319
  • 320
  • 321
  • 322
  • 323
  • 324
  • 325
  • 326
  • 327
  • 328
  • 329
  • 330
  • 331
  • 332
  • 333
  • 334
  • 335
  • 336
  • 337
  • 338
  • 339
  • 340
  • 341
  • 342
  • 343
  • 344
  • 345
  • 346
  • 347
  • 348
  • 349
  • 350
  • 351
  • 352
  • 353
  • 354
  • 355
  • 356
  • 357
  • 358
  • 359
  • 360
  • 361
  • 362
  • 363
  • 364
  • 365
  • 366
  • 367
  • 368
  • 369
  • 370
  • 371
  • 372
  • 373
  • 374
  • 375
  • 376
  • 377
  • 378
  • 379
  • 380
  • 381
  • 382
  • 383
  • 384
  • 385
  • 386
  • 387
  • 388
  • 389
  • 390
  • 391
  • 392
  • 393
  • 394
  • 395
  • 396
  • 397
  • 398
  • 399
  • 400
  • 401
  • 402
  • 403
  • 404
  • 405
  • 406
  • 407
  • 408
  • 409
  • 410
  • 411
  • 412
  • 413
  • 414
  • 415
  • 416

The
HP Digital Imaging
settings should be used only on high-resolution images (600 dpi or higher) that
are printed on photograph-quality paper. These settings are not recommended for text.
For the
Contrast Enhancement
,
Digital Flash
,
SmartFocus
, and
Smoothing
settings, the following
controls are available:
Automatic
check box
A slide bar ranging from
Off
to
High
The SharpFocus settings are
Off
and
On
.
Use the following controls to enhance digital images:
Contrast Enhancement
. Use the
Contrast Enhancement
setting to increase image contrast for
a more visually pleasing result. This filter is useful with flat images (images in which much of the
image content is compressed into a small, dynamic range of pixel values). Flat images can result
from low lighting, environmental haze, or camera or scanner limitations.
Digital Flash
. Use the
Digital Flash
setting to adjust lighting levels to reveal areas in shadow. The
filter locates dark areas in an image and brings out detail without degrading other features in the
image.
Sharpness
. Many images are improved by increasing their sharpness. Use the
Sharpness
feature
to make edge detail more prominent. The filter detects regions that contain significant variations
in pixel value along a number of different vectors (which denotes edges) and then applies a filter
to enhance detail.
SmartFocus
. Use the
SmartFocus
setting to increase the apparent resolution of lower resolution
images. Many images that are downloaded from the Internet or from digital cameras can be
compressed because of size restrictions, and might exhibit pixilation artifacts when printed.
SmartFocus upscales the image to the printer resolution without accentuating these artifacts.
Smoothing
. Just as many images benefit from increased sharpness, many images are improved
by smoothing, which decreases noise artifacts that digital cameras or scanners often create. When
you select
Smoothing
, the filter locates areas that contain abrupt changes in pixel value by
comparison with surrounding pixels (which denotes noise) and then applies a filter to smooth the
output.
224
Chapter 4
HP PCL 6, PCL 5, and PS emulation unidrivers for Windows
ENWW