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HP Scanjet 7450c HP Scanjet 7400C Series Scanner Mac - (English) User Manual - Page 79

Resolving image-quality issues, Resolving issues with scanned images

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Back to TOC Resolving image-quality issues This section contains information for resolving image-quality issues, whether you scanned using the scanner glass, the ADF, or the XPA. q Resolving issues with scanned images. See this page. q Resolving issues with printed copies. See page 82. q Resolving issues with slides and negatives. See page 84. Troubleshooting usage and maintaining 79 Resolving issues with scanned images This section contains solutions to issues that affect all scanned images, regardless of whether you used the scanner glass or the ADF. If you were printing, see also "Resolving issues with printed copies" on page 82. Scanned images are too light or too dark. The original image might be very light or dark or be printed on colored paper. Adjust the midtone, highlight, and shadow settings from the HP PrecisionScan Pro software. See "Scanning from HP PrecisionScan Pro" on page 29. Scanned images have black dots or streaks in top and bottom margins. There might be ink, glue, white-out, or some other substance on the scanner glass. Clean the scanner glass. See "Cleaning the scanner" on page 95.

Section	Page
Getting started	5
Printing this information	5
Viewing the product tour	5
Where do I start?	6
Using the scanner buttons	6
Using the HP PrecisionScan Pro software	6
Using another program	6
Using the HP ScanJet Copy Utility	6
Selecting and preparing items	7
Items for the scanner glass	7
Items for the ADF	7
Items for the XPA	8
Completing your first scan	9
Frequently asked questions	12
Scanning from scanner buttons	15
Overview of scanner buttons	16
Scanning quickly without making changes	17
E-mailing a scan	17
Faxing a scan	19
Printing copies	21
Saving a scan to a file	22
Making scanned text editable	23
Changing settings for buttons	25
List of options for scanner buttons	25
Scanning from HP PrecisionScan Pro	29
Overview of the HP PrecisionScan Pro software	29
Finding help for using the software	30
Performing a new scan	31
Cropping or selecting an area for final scan	32
Getting a closer look (zooming)	33
Selecting output type	33
Making optional adjustments, basic	35
Resizing (output dimensions)	35
Changing resolution	36
Changing contrast	36
Rotating an image	37
Mirroring (reversing) an image	37
Sharpening an image	38
Resetting all adjustments	38
Making optional adjustments, advanced	39
Inverting the image	39
Changing midtones	40
Changing highlights	41
Changing shadow	42
Checking for clipped areas	43
Setting pixel output levels	44
Viewing RGB values and pixels	45
About the histogram	45
Changing the hue	46
Changing the saturation	46
Changing the black-and-white threshold	47
Setting which colors become black or white in black & white bitmaps	48
Descreening images	49
Resetting all adjustments	49
Completing the final scan	50
Sending to a program	50
Returning the image to a program that supports TWAIN or the HP ScanJet Plug-in	51
Saving to a file	52
Printing	54
Placing a scan on a website	55
Copying and pasting into another program	57
Dragging-and-dropping into another program	57
Dragging-and-dropping to the desktop or a folder	58
Other features and tips	59
Tips for best image quality	59
Saving settings	60
Setting preferences	60
Scanning from other programs	64
Using accessories	65
Scanning from the ADF	66
Scanning from the XPA	67
Scanning slides	67
Scanning negatives	69
Scanning transparencies	71
Making optional adjustments for transparent items	72
Adjusting midtones for transparent items	73
Adjusting highlights for transparent items	73
Adjusting shadows for transparent items	74
Viewing RGB values and pixel color	74
Troubleshooting usage and maintaining	75
Checking the basics	75
Starting troubleshooting	76
Resolving issues that did not generate messages	77
Resolving image-quality issues	79
Resolving issues with scanned images	79
Resolving issues with printed copies	82
Resolving issues with slides and negatives	84
Resolving issues with editable text	85
Resolving issues sending to destinations	87
Resolving issues with accessories	90
Resolving issues with the XPA	90
Resolving issues with the ADF	91
Setting scanner lamp controls	92
Energy Save mode	92
Faster Scan mode	92
Clearing jams from the ADF	93
Cleaning and maintaining	95
Cleaning the scanner	95
Cleaning the XPA	96
Cleaning the ADF	96
Replacing the ADFWindow	98
Uninstalling the software	100
Other resources, support, and specifications	100
Using software commands and controls	101
Using keyboard shortcuts and the menus	102
HP PrecisionScan Pro tool and information bars	105
Toolbar	105
Info bar	106
Context-sensitive cursors	107
Glossary	109
symbols	109
a	109
b	110
c	111
d	112
e	113
f	113
g	114
h	115
i	115
j	116
k	116
l	116
m	117
n	117
o	117
p	118
q	119
r	119
s	120
t	121
u	122
v	122
w	122
x	122
y	123
z	123