Canon scanner CanoScan D1250U2F User Manual

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Crop
The action of selecting part of an image. The Crop button on the ScanGear
CS-U main window lets you select part of a preview image and re-preview
or scan only that selected part.
Curve chart
The graph displayed in the Tone tab settings for the Auto Tone, Contrast/
Brightness, Gamma, Histogram, and Special Tone Curves features. This
graph describes the relationship between the color characteristics of the
previewed image and the available feature settings.
Default
The preset factory settings on hardware or software.
Executive
A standard U.S. paper size measuring 7.25 x 10.5 in (184.2 x 266.7 mm)
Full Platen
The maximum scanning area on the scanners document glass:
216 x 297 mm (width of U.S. Letter and length of A4 paper sizes).
Gamma Curve
The Gamma Curve lets you change the midtones of colors to increase
the contrast between colors and enhance the overall image. When you
increase the Gamma value, light colors are made lighter, and dark colors
are made darker. The graphed curve represents the relationship between
input and output values for the midtones of the preview image. 
						

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Grayscale
Grayscale refers to a single-channel image made up of 256 shades of gray,
ranging from white to black, that represent all tones in an image.
Halftoning
A method of simulating intermediate tones in black-and-white images by
varying the patterns of dots and lines. Halftoning is usually used for
photographs, or other images with intermediate tones, scanned in Black
and White.
Histogram
The Histogram displays the distribution of bright and dark pixels for ea\
ch
color channel in the previewed image. The Eyedropper tool on the
histogram graph lets you redefine the tonal profile.
Magazine-Reduce Moiré / Descreen
Moiré patterns are caused by poor dithering as a result of scanning images
from published materials, such as newspapers, magazines and books.
When this feature is on, moiré reduction smoothes the overall appearance
of the image and enhances image quality.
Multi-Photo Mode / Multi Crop
Multi-Photo Mode or Multi Crop is a function used to scan two or more
photos in a single operation. Each image will appear in individual windo\
w
in the application program. (See Chapter 4 for details.) 
						

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OCR (Optical Character Recognition)
OCR software converts text images into actual text characters readable by a
word-processing program or similar application. The Text Enhanced scan
setting sharpens the black and white contrast to assist in the accurate
recognition of characters in OCR software.
Pixel
An acronym for picture element A pixel is the smallest element used to
create a screen image. It can contain up to 42 bits of color information.
Preview Area
The area located to the left of the ScanGear CS-U main window where the
image is displayed before the scan occurs. When you click the Preview
button, the image on the scanner is scanned into the Preview Area, but not
acquired by the application.
Reduce Dust and Scratches
This function automatically produces a scanned photo image with the area
under small bits of dirt or scratches reduced.
Resolution
The degree of detail, translated into the number of pixels or dpi, that can
be displayed or reproduced by a device, such as a scanner, video monitor,
printer, or other image-displaying device, can display or reproduce. See also
dpi, Pixel, Scan Resolution.
Statement
A U.S. standard paper size measuring 5.5 x 8.5 in (139.7 x 215.9 mm). 
						

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Threshold
In a black-and-white image, the threshold is the point at which a gray pixel
is determined to become either black or white. The Threshold slider is on
the Halftone sheet. Adjust the Threshold value when you are scanning a
grayscale or halftone original with the Black and White setting.
Tone sheet
The Tone sheet contains tools that let you adjust and correct the image
tone. The Tone sheet tools include Auto Tone, Contrast/Brightness, Gamma,
Histogram, and Special Tone Curves.
TWAIN
TWAIN refers to an industry standard for transferring information from
devices (such as a scanners or digital cameras) to your computer. One
interpretation of the acronym is Technology Without An Interesting
Name”.
Unsharp Mask
Sharpens an image, like a photograph that is slightly out of focus, by
emphasizing the contrast to make outlines clearer. 
						

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Index 
						

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Glossary Contents
IndexA
Advanced Mode button ... 8
Advanced Mode Main Window ... 10  ,23
All Reset button ...  34
Auto Crop ...  59
Auto Crop Button ...  14
Auto Tone ...  22
Auto Tone Adjustment ...  59
Auto Tone Button ...  33
B
Bits and Bit Depth ...  59
Black-point ...  39
Brightness ...  35 ,59
C
Calibration ...  31 ,60
Canon ColorGear Color Matching ... 57  ,60
Channel ...  35 ,36  ,38  ,40
Clear Button ...  12 ,15
Close Box ...  12
Color Channels ...  60
Color Management Settings ...  57Color Mode ... 
19 ,23  ,60
Black and White ...  19 ,23
Color ...  19 ,23
Grayscale ...  19 ,23
T ext Enhanced ...  19 ,23
Color Settings ...  30
Canon ColorGear Color Matching ...  30
Recommended ...  30
Contrast ...  35 ,60
Contrast/Brightness Button ...  33
Contrast/Brightness Sheet ...  35
Crop ...  61
Crop Button ...  13
Curve chart ...  61
D
Default ... 61
Descreen ...  28 ,62
E
Edit Image Type Button ...  20
Energy Saving Mode ...  31
Events Settings ...  53
Disable device events ...  54
Scanner events ...  53
Send to this application ...  53
Executive ...  61
Eyedroppers ...  39 
						

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Glossary Contents
IndexF
Film ... 16 ,27
Film Type ...  20 ,28
Filter Processing ...  28
Full Platen ...  61
G
Gamma ... 37
Gamma Button ...  33
Gamma Curve ...  61
Gamma Sheet ...  36
General Settings ...  52
Grayscale ...  62
H
Halftone Sheet ...  42
Halftoning ...  62
Height ...  21
Help Button ...  14
Histogram ...  62
Histogram Button ...  33
Histogram Sheet ...  38
I
Image Source ... 16 ,27
Image Type ...  17
L
Load Button ...  34
M
Magazine-Reduce Moiré ...  22 ,62
Main Sheet ...  23
Mid-point ...  39
Mirror Button ...  14
Mode Switching Button ...  12
Move Image Button ...  13
Multi Crop ...  26 , 47  ,62
Multi-Photo Mode ...  22 ,45  ,62
Multi-Photo Scan ...  44
N
Negative/Positive Button ...  14
O
OCR ... 63
Output Resolution ...  24 
						

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IndexP
Paper Size ... 21 ,27
Pixel ...  63
Platen ...  16 ,27
Preferences Settings ...  55
Preview Area ...  12 ,63
Preview Button ...  12 ,15
Print Size ...  26
Scale ...  26
W idth and Height ...  26
Q
Quick Preview ... 31
R
Reduce Dust and Scratches ...  29  ,63
Reset ...  39
Reset button ...  34
Resolution ...  20 ,63
Rotate Left Button ...  14
Rotate Right Button ...  14
Rulers Button ...  14
S
Save Button ... 34
Scan Button ...  12 ,15
Scanner Gamma ...  37
Scanners and Cameras properties ... 50
Select Special Curve ...  40
Selection ...  25
Keep Proportions button ...  25
Units ...  25
W idth and Height ...  25
Settings Sheet ...  27
Shut off lamp time ...  31
Simple Mode button ...  8
Simple Mode Main Window ...  9 ,16
Simple Mode sheet ...  16
Size ...  21
Special Tone Curves ...  41
Special Tone Curves button ...  33
Special Tone Curves Sheet ...  40
Statement ...  63
Status Area ...  12
T
Tabs ...  12
T est Scanner or Camera ...  52
Threshold ...  42 ,64
T one Sheet ...  32 , 64
T oolbar ...  12 , 13
TWAIN ...  64 
						

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IndexU
Unsharp Mask ... 28 ,64
W
White-point ...  39
Width ...  21
Window Resize Corner ...  12
Z
Zoom Tool Button ... 13