Canon Pixma Mp540 User Guide

							More data is distributed to the
highlight side.
More data is distributed to the
shadow side.
Data is widely distributed between the
highlight and shadow.
Adjusting Histograms (Using the Slider)
Select a Channel, then move  (Black-point Slider) or  (White-point Slider) to specify the level to be
set as the shadow or highlight.
- All parts to the left of  (Black-point Slider) will be black (level 0).
- The parts at  (Mid-point Slider) will turn to the color exactly between the black-point and white-point.
- All parts to the right of  (White-point Slider) will turn white (level 255).
Auto Tone is set to ON by default. Adjustments shown below are automatically performed.
Moving the Black-point and White-point Sliders
Move the Black-point Slider or White-point Slider to adjust brightness.
Images with more data distributed to the highlight side
Move the Black-point Slider toward the highlight side.
Images with more data distributed to the shadow side
Move the White-point Slider toward the shadow side.
Images with widely distributed data
Move the Black-point Slider toward the highlight side, and White-point Slider toward the shadow side.
Moving the Mid-point Slider
Move the Mid-point Slider to specify the level to be set as the middle of the tonal range.
Images with more data distributed to the highlight side
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							Move the Mid-point Slider toward the highlight side.
Images with more data distributed to the shadow side
Move the Mid-point Slider toward the shadow side.
Adjusting Histograms (Using the Droppers)
When you select a Channel and click the Black-point, Mid-point or White-point Dropper, the mouse
pointer on the preview image changes to a dropper. Click a Dropper displayed below the histogram to
change the setting.
- The point clicked with  (Black-point Dropper) will be the darkest point. You can also enter a value (0
to 245).
- The point clicked with  (Mid-point Dropper) will be the middle of the tonal range. You can also enter
a value (5 to 250).
- The point clicked with  (White-point Dropper) will be the brightest point. You can also enter a value
(10 to 255).
- Click  for Gray Balance and click the area you want to adjust the color in the preview image.
The clicked point will be set as the achromatic color reference, and the rest of the image is adjusted
accordingly. For instance, if snow in a photo appears bluish, click the bluish part to adjust the whole
image and reproduce natural colors.
Note
Click Defaults to reset all adjustments in the current window.
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							Advanced Guide > Scanning > Scanning with Other Application Software > Correcting Images and Adjusting Colors with
ScanGear (Scanner Driver) > Adjusting Tone Curve
Adjusting Tone Curve
In ScanGears Advanced Mode, click  (Tone Curve Settings).
Channel
Each dot of an image is a mixture of Red, Green and Blue in various proportions (gradation). These
colors can be adjusted individually as a channel.
Master
Adjust the Red, Green and Blue combined.
Red
Adjust the Red channel.
Green
Adjust the Green channel.
Blue
Adjust the Blue channel.
Note
Only Grayscale will be displayed in Channel when Color Mode is Grayscale.
Reading Tone Curves
With ScanGear (scanner driver), scanning images via a scanner is the input, and displaying to a monitor
is the output. Tone Curve shows the balance of tone input and output for each Channel.
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							Adjusting Tone Curve
In Select Tone Curve, select a tone curve from No correction, Overexposure, Underexposure, High
contrast, Reverse the negative/positive image and Edit custom curve.
No correction (No adjustment)
Overexposure (Convex curve)
The midtone data of the input side is stretched toward the highlight of the output side, resulting in a
bright-toned image when viewed on a monitor.
Underexposure (Convex curve)
The midtone data of the input side is stretched toward the shadow of the output side, resulting in a dark-
toned image when viewed on a monitor.
High contrast (S curve)
The highlight and shadow of the input side are enhanced, resulting in a high-contrast image.
Reverse the negative/positive image (Downward-sloping line)
The input and output sides are reversed, resulting in a negative-positive inverted image.
Edit custom curve
You can drag specific points on the Tone Curve to freely adjust the brightness of the corresponding
areas.
Note
Click Defaults to reset all adjustments in the current window.
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							Advanced Guide > Scanning > Scanning with Other Application Software > Correcting Images and Adjusting Colors with
ScanGear (Scanner Driver) > Setting Threshold
Setting Threshold
The brightness of color and grayscale images is expressed in a value between 0 and 255. However, in
creating black and white images, all colors are mapped to either black (0) or white (255). Threshold is
the borderline value that determines a color as black or white. By adjusting the threshold level, you can
sharpen text in a document or reduce show-through in newspapers.
This function is available when Color Mode is Black and White.
In ScanGears Advanced Mode, click  (Threshold).
Adjusting Threshold
Move  (slider) to the right to increase the threshold value and thus increase the black areas. Move the
slider to the left to decrease the value and thus increase the white areas. You can also enter a value (0 to
255).
Note
Click Defaults to reset all adjustments in the current window.
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							Advanced Guide > Scanning > Scanning with Other Application Software > ScanGear (Scanner Driver) Screens
ScanGear (Scanner Driver) Screens
The following sections describe ScanGears screens and functions, and how to use ScanGear (scanner
driver).
Basic Mode Tab
Advanced Mode Tab
Input Settings
Output Settings
Image Settings
Color Adjustment Buttons
Auto Scan Mode Tab
Preferences Dialog Box
Scanner Tab
Preview Tab
Scan Tab
Color Settings Tab
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							Advanced Guide > Scanning > Scanning with Other Application Software > ScanGear (Scanner Driver) Screens >
Basic Mode Tab
Basic Mode Tab
This mode allows you to scan easily by following the on-screen steps.
This section describes the settings and functions available in Basic Mode.
The displayed items vary by document type and how the screen was opened.
(1) Settings and Operation Buttons
(2) Toolbar
(3) Preview Area
Settings and Operation Buttons
Select Source
Photo(Color)
Scan color photos.
Magazine(Color)
Scan color magazines.
Newspaper(Grayscale)
Scan text and line drawings in black and white.
Document(Grayscale)
Scan photos and documents in black and white.
Select this mode to create high-resolution black and white images.
Note
If you select an option other than Newspaper(Grayscale), the Unsharp Mask function will be
active.
If you select Photo(Color), Magazine(Color) or Document(Grayscale), the Auto Tone function will
be active. However, if you disable Always Execute the Auto Tone on the Color Settings tab of the
Preferences dialog box, the Auto Tone function will be disabled.
If you select Magazine(Color), the Descreen function will be active.
Display Preview Image
Click Preview to perform a trial scan. The scanned document appears in the Preview area. A
cropping frame (scan area) is displayed according to the document size.
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							Note
If you scan without preview, colors are adjusted based on the document type selected in Select
Source.
When using the machine for the first time, scanner calibration starts automatically. Wait a while
until the preview image appears.
Destination
Select what you want to do with the scanned image.
Print (300 dpi)
Select this to print the scanned image on a printer.
Image display (150 dpi)
Select this to view the scanned image on a monitor.
OCR (300 dpi)
Select this to use the scanned image with OCR software.
OCR software is software that converts text scanned as an image into text data that can be
edited in word processors and other programs.
Note
To scan at 301 dpi or higher, scan in Advanced Mode after setting the Output Resolution.
See Scanning in Advanced Mode to scan in Advanced Mode.
Output Size
Select an output size.
Output size options vary by the item selected in Destination.
Flexible
When a cropping frame is displayed, the portion within the cropping frame will be scanned at
100%. When no cropping frame is displayed, the entire Preview area will be scanned.
Paper Size (L, A4, etc.)
Select an output paper size. The portion within the cropping frame will be scanned at the size of
the selected paper size. You can drag the cropping frame to enlarge/reduce it while maintaining
the aspect ratio.
Monitor Size (1024 x 768 pixels, etc.)
Select an output size in pixels.
A cropping frame of the selected monitor size will be displayed and the portion within the
cropping frame will be scanned. You can drag the cropping frame to enlarge/reduce it while
maintaining the aspect ratio.
Add/Delete...
Open the Add/Delete the Output Size dialog box, in which you can save custom output sizes. You
can select this option when Destination is Print (300 dpi) or Image display (150 dpi).
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							In the Add/Delete the Output Size dialog box, you can specify multiple output sizes and save
them at one time. Saved items appear in the Output Size list along with the predefined items.
Add
To add a size, enter Output Size Name, Width and Height, then click Add. For Unit, you can
select mm or inches when Destination is Print (300 dpi) but you can only select pixels when
Destination is Image display (150 dpi). The name of the added size appears in Output Size List.
Click Save to save the items listed in Output Size List.
Delete
To delete an item, select it in Output Size List and click Delete. Click Save to save the items
listed in Output Size List.
Important
You cannot delete predefined output sizes such as A4 and 1024 x 768 pixels.
Note
Save up to 10 output sizes to Output Size List.
An error message appears when you enter a value outside the setting range. Enter a value
within the setting range.
Note
Whether or how the cropping frame is initially displayed on a preview image can be specified
on the Preview tab of the Preferences dialog box. See Cropping Frame on Previewed Images in
Preview Tab.
 Invert aspect ratio
This button is available when Output Size is set to anything but Flexible.
Click this button to rotate the cropping frame. Click again to return it to the original orientation.
Adjust cropping frames
You can adjust the scan area within the Preview area.
If an area is not specified, the document will be scanned at the document size (Auto Crop). If an area
is specified, only the portion in the cropping frame will be scanned.
Note
See Adjusting Cropping Frames
 for details on cropping frames.
Image corrections
Fading correction
Corrects and scans photos that have faded with time or have a colorcast.
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							Backlight correction
Corrects photos that have been shot against light.
Gutter shadow correction
Corrects shadows that appear between pages when scanning open booklets.
Important
For precautions on using this function, see Gutter Shadow Correction in Image Settings
 (Advanced Mode tab).
Color Pattern...
Allows you to adjust the images overall color. You can correct colors that have faded due to
colorcast, etc. and reproduce natural colors while previewing color changes.
Note
See Adjusting Colors Using a Color Pattern for details.
Perform Scan
Click Scan to start scanning.
Note
When scanning starts, the progress will be displayed. Click Cancel to cancel the scan.
Preferences...
The Preferences dialog box opens and you can make scan/preview settings.
See Preferences Dialog Box for details.
Close
Close ScanGear (scanner driver).
Toolbar
Toolbar
You can rotate preview images using the Toolbar.
 (Auto Crop)
Displays and adjusts the cropping frame automatically to the size of the document displayed in
the Preview area. The scan area is reduced every time you click this button if there are cropping
area within the cropping frame.
 (Remove Cropping Frame)
Removes the selected cropping frame.
 (Rotate Left)
Rotates the preview image 90 degrees counter-clockwise.
- The result will be reflected in the scanned image.
- The image returns to its original state when you preview again.
 (Rotate Right)
Rotates the preview image 90 degrees clockwise.
- The result will be reflected in the scanned image.
- The image returns to its original state when you preview again.
 (Information)
Displays the version of ScanGear (scanner driver) and the current settings.
 (Open Guide)
This page appears.
Preview Area
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