Canon scanner CanoScan D1250U2F User Manual

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Index
Quick Preview
Click this check box to switch the function on and off.
When this function is off, calibration is performed with every preview scan.
When this function is on, calibration is not performed with every preview
scan. The gained calibration data of former scanning will be taken and i\
t
will take shorter time to perform preview scan.
Energy Saving Mode
Click this check box to put the scanner in the energy saving mode. If th\
e
scanner remains idle for the amount of time specified in the Shut off lamp
time box, the scanner lamp switches off. As soon as you start another
scanning job, the lamp switches on again.
Shut off lamp time
This option is enabled when the Energy Saving Mode is switched on. This
sets the amount of scanner idle time that elapses before the scanner
automatically enters the energy saving mode. Select a value (default: 1\
2
min.) within the range 10 to 59 minutes. (Actual time may differ slightly
from the set values.)
Calibration
Click this button to start calibration. Calibration adjusts the color processing
of input and output devices to match the colors in the scanned image wit\
h
the colors you see on the computer screen and in the printed image.
During calibration, do not open the scanner’s document cover. 
						

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IndexThe Tone Sheet
When you click on the Tone tab, the Tone sheet opens.
The Tone sheet is displayed only when Color or Grayscale has been selected
for Color Mode on the Advanced Mode Main sheet and when Canon
ColorGear Color Matching is not selected on the Settings sheet.
•Changing the Color Mode selection or clicking the Clear button
r estores the default settings on the Tone sheet.
•T one sheet adjustment is conducted with the Preview Area.
• Settings can be selected even when there is no image in the
Preview Area. In this case the settings take effect on the next
scanned image.
These are the Tone sheet buttons that open each tool chart and allow you
to enhance images in the Preview Area. 
						

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IndexT
one Sheet Buttons
 Auto Tone Button
The Auto Tone button turns the automatic tone correction feature on.
Automatic tone correction automatically adjusts the image tone within the
cropped area to produce a better image. This button and the Auto tone in
the Simple Mode sheet have the same feature.
  Contrast/Brightness Button
Opens the Contrast/Brightness sheet and allows you to adjust the
brightness and contrast of the entire image.
  Gamma Button
Opens the Gamma sheet and allows you to shift mid-tones so lighter color\
s
are lightened and darker colors are darkened.
  Histogram Button
Opens the Histogram sheet and allows you to adjust tone intensity to
enhance an image that is either too light or too dark.
  Special Tone Curves Button
Opens the Special Tone Curves sheet and allows you to adjust the tones for
one or all of the three primary colors (RGB) by selecting a special tone curve
or editing a tone curve. 
						

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IndexCommon Buttons
The Tone sheet settings are commonly set with the Load, Save, Reset and
All Reset buttons described below.
 Load Button
When the Color Mode is set to Color, a user-saved file (*.adc) is opened
and used for color adjustment.
When the Color Mode is set to Grayscale, user-defined file (*.adg) is
opened and used to adjusting gray tones.
  Save Button
When the Color Mode is set to Color, the user-defined settings are saved to
a file (*.adc) for color adjustment.
When the Color Mode is set to Grayscale, the user-defined settings are
saved to a file (*.adg) for use in adjusting gray tones.
The system determines the path and file name for the saved file.
  Reset Button
Resets the displayed settings of the channel (M, R, G or B) for the fu\
nction
(Contrast/Brightness, Gamma, Histogram or Special Tone Curve)  to the
default setting.
  All Reset Button
Resets all the channel setting (M, R, G and B) for all functions (Con\
trast/
Brightness, Gamma, Histogram and Special Tone Curve)  to the default
settings. Also resets the image adjusted with the Auto Tone function to the
initial status. 
						

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IndexContrast/Brightness Sheet
  When the Contrast/Brightness button is clicked, the Contrast/
Brightness sheet is displayed.
The shape of the tone curve changes to reflect the current Contrast/
Brightness setting for the current Channel, and the image in the Preview
Area changes to reflect the adjustment.
Channel
If you want to select one of the primary colors (RGB) to adjust the co\
ntrast
or brightness, click the Channel down-arrow and select a color, or leave the
settings at Master to adjust all the colors.
Contrast
Drag the Contrast slider to the left to decrease the contrast of the image or
to the right to increase the contrast of the image.
Brightness
Drag the Brightness slider to the left to darken the image or to the rig\
ht to
lighten the image. 
						

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Glossary Contents
IndexGamma Sheet
  When the Gamma button is clicked, the Gamma sheet is displayed.
Gamma refers to a process where mid-tones are shifted so that the lighter
colors are lightened and darker colors are darkened. For example, let us say
you scanned a photograph of a subject in a boat in a tree-lined lake and
the shadows of the trees are dark enough and the white of the boat is light
enough, but the blue in the sky, the blue of the water, and the blue of the
subject’s clothing all look the same.  By increasing the Scanner Gamma
value of the image, the sky might become lighter and the water darker,
giving a better contrast to the image. The Monitor Gamma value is a
r eciprocal number of the Scanner Gamma value.
Channel
If you want to select one of the primary colors (RGB) to adjust the ga\
mma
value, click the Channel down-arrow and select a color or leave the settings
at Master to adjust all the colors. 
						

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Index
Gamma (Scanner Gamma)
Drag the Gamma slider to the left or right to set the scanner gamma valu\
e
or type the value directly into the boxes. Entering a value into either the
scanner gamma box or the monitor gamma box will display a respective
value in the other box. The allowed range of values is 0.10 to 10.00
inclusive.  The shape of the tone curve changes to reflect the current
gamma setting for the current Channel, and the image in the Preview Area
changes to reflect the adjustment. When the Scanner Gamma value is
modified, the Monitor Gamma value changes automatically. 
						

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IndexHistogram Sheet
  When the Histogram button is clicked, the Histogram sheet is
displayed.
Use the histogram to enhance an image when the image is either too light\
or too dark, like an overexposed or underexposed photograph.  Increasing
the darker tones with the histogram improves the contrast of the image.
Channel
If you want to select one of the primary colors (RGB) to adjust the
histogram, click the Channel down-arrow and select a color, or leave the
setting at Master to adjust all colors. 
						

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Index
Eyedroppers (Black-point, Mid-point, White-point)
Click one of the three eyedroppers then click the portion of the image in
the Preview Area that you want to sample, or enter values in the text boxes,
or drag one of the three triangles at the bottom of the graph to adjust the
value. The shape of the tone curve and histogram changes to reflect the
current Histogram setting for the current Channel, and the image in the
Preview Area changes to reflect the adjustment.
•A White-point value must be larger than a Black-point,
and a Mid-point value must be between the Black-point
and White-point.
Reset
Resets the default values: •Black-point :0
• Mid-point :128
• White-point :255
Note 
						

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IndexSpecial Tone Curves Sheet
  When the Special Tone Curves button is clicked, the Special Tone
Curves sheet is displayed.
Channel
Click the down-arrow and select one of the primary colors (RGB) for
adjustment or leave the setting at Master to adjust all the colors.
Select Special Curve
Click the down-arrow and select a setting from the drop-down list. These
settings are designed to solve some of the most common problems with
scanned images:  overexposure, underexposure, or poor contrast:
• No correction
• Fix an image that is underexposed
• Fix an image that is overexposed
• Fix an image that is low contrast
• Edit Custom Curve