Canon printer PIXMA MG6620 User Manual
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Note• Refer to "Adjusting Cropping Frames (ScanGear)" for details on cropping frames. • For details on whether or how the cropping frame is initially displayed on a preview image, refer to Cropping Frame on Previewed Images in " Preview Tab" (Preferences dialog box). (Switch Aspect Ratio) 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. Data Size The data size when scanned with the current settings is displayed. Note • When the data size exceeds a certain size, the value appears in red. In that case, a warning message appears when you click Scan. It is recommended that you adjust the settings to reduce Data Size . To continue, scan in whole image view. 691
Image Settings Important • Do not apply these functions to images without moire, dust/scratches, or faded colors. The color tone may be adversely affected. • Image correction results may not be reflected in the preview image. Note • Selectable settings depend on Color Mode settings. • Scanning may take longer than usual when you use Image Settings. Image Settings allows you to set the following items: Image Adjustment When Image Adjustment is set, the brightness of the specified portion of the image is optimized. Images can be adjusted according to the automatically detected document type or the specified document type. The result of the adjustment will be reflected in the entire image. None Image Adjustment will not be applied. Auto Applies Image Adjustment by automatically detecting the document type. It is recommended that you normally select this setting. Photo Applies Image Adjustment suitable for photos. Magazine Applies Image Adjustment suitable for magazines. Document Applies Image Adjustment suitable for text documents. 692
Important• You can set Image Adjustment after preview. • You can set this setting when Recommended is selected on the Color Settings tab of the Preferences dialog box. Note • If the image is not adjusted properly with Auto, specify the document type. • The color tone may change from the source image due to the Image Adjustment. In that case, set Image Adjustment to None . Reduce Show-through Use this function to reduce show-through in duplex documents or lighten the base color in recycled paper and other colored paper when scanning documents. OFF Show-through will not be reduced. ON Select this to reduce show-through in duplex documents or lighten the base color. It isrecommended that you normally select this setting. Important • Reduce Show-through can be set when Recommended is selected on the Color Settings tab of the Preferences dialog box and Document or Magazine is selected for Image Adjustment . Unsharp Mask Emphasizes the outline of the subjects to sharpen the image when scanning photos. OFF Unsharp Mask will not be applied. ON Emphasizes the outline of the subjects to sharpen the image. It is recommended that you normally select this setting. Descreen Printed photos and pictures are displayed as a collection of fine dots. "Moire" is a phenomenon where uneven gradation or a stripe pattern appears when such photos or pictures printed with fine dots are scanned. Descreen is the function for reducing this moire effect. OFF Moire will not be reduced. ON Reduces moire. It is recommended that you normally select this setting. Note • Even if Descreen is set to ON, some moire effects may remain if Unsharp Mask is set to ON. In that case, set Unsharp Mask to OFF . Reduce Dust and Scratches Scanned photos may contain white dots caused by dust or scratches. Use this function to reduce such noise. None Dust and scratches will not be reduced. 693
LowSelect this to reduce small dust particles and scratches. Large ones may remain. Medium It is recommended that you normally select this setting. High Select this to reduce large dust particles and scratches; however, evidence of the reduction process may remain or delicate parts of the image may be removed. Important • This function may not be effective for some types of photos. Note • It is recommended that you select None when scanning printed materials. Fading Correction Use this function to correct photos that have faded with time or have a colorcast. "Colorcast" is aphenomenon where a specific color affects the entire picture due to the weather or ambient strong colors. None Fading Correction will not be applied. Low Select this to correct a small amount of fading and colorcast. Medium It is recommended that you normally select this setting. High Select this to correct a large amount of fading and colorcast. This can affect the tone of the image. Important • You can set Fading Correction after preview. • You can set this setting when Recommended is selected on the Color Settings tab of the Preferences dialog box. • Correction may not be applied properly if the scan area is too small. Grain Correction Use this function to reduce graininess (roughness) in photos taken with high-speed or sensitized film. None Graininess will not be reduced. Low Select this when the photo is slightly grainy. Medium It is recommended that you normally select this setting. High Select this when the photo is very grainy. This can affect the gradation and sharpness of the image. Important • Correction may not be applied properly if the scan area is too small. 694
Gutter Shadow CorrectionUse this function to correct shadows that appear between pages when scanning open booklets. When you set the Gutter Shadow Correction setting in the preview image, the result will be reflected. Preview the effects before scanning, as results vary depending on the type of document and how it is pressed. Unclear or blurred text/lines caused by curved pages are not corrected. None Gutter shadow will not be corrected. Low Select this when the effect level is too strong with the medium setting. Medium It is recommended that you normally select this setting. High Select this when the effect level is too weak with the medium setting. Important • You can set Gutter Shadow Correction after preview. • Do not place objects that weigh 4.4 lbs (2.0 kg) or more on the platen. Also, do not press on the document with a force exceeding 4.4 lbs (2.0 kg). If you press heavily, the scanner may not work correctly or you might break the glass. • Align the document with the edge of the Platen. If not, the shadow will not be corrected properly. • Shadows may not be corrected properly depending on the document. If the page background is notwhite, shadows may not be detected correctly or may not be detected at all. • While scanning, press down on the spine with the same amount of pressure you used to preview the scan. If the binding part is not even, the shadow will not be corrected properly. • How to place the document depends on your model and the document to be scanned. Note • Cover the document with black cloth if white spots, streaks, or colored patterns appear in scan results due to ambient light entering between the document and the Platen. 695
•If the shadow is not corrected properly, adjust the cropping frame (scan area) on the previewimage. Adjusting Cropping Frames (ScanGear) 696
Color Adjustment ButtonsThe Color Adjustment Buttons allow you to make fine corrections to the image brightness and color tones including adjustments to the image's overall brightness or contrast and adjustments to its highlight and shadow values (histogram) or balance (tone curve). Important • The Color Adjustment Buttons are not available when you select Color Matching on the Color Settings tab of the Preferences dialog box. Note • Selectable settings depend on Color Mode settings. • When you adjust the image via the Color Adjustment Buttons, the results will be reflected in the preview image. Click a Color Adjustment Button to set the following items: (Saturation/Color Balance) Adjust the saturation (vividness) and color tone of the image. Use this function to brighten colors that have faded with time or due to colorcast. "Colorcast" is a phenomenon where a specific color affects the entire picture due to the weather or ambient strong colors. Adjusting Saturation and Color Balance (Brightness/Contrast) Adjust the brightness and contrast of the image. If the image is too dark or too bright, or if the image quality is flat due to lack of contrast, you can adjust the levels of brightness and contrast. Adjusting Brightness and Contrast 697
(Histogram) A histogram allows you to see the data concentration at each brightness level of an image. You can specify the brightest level (highlight) and darkest level (shadow) within an image, cut the levels and expand the middle of the tonal range of the image. Adjusting Histogram (Tone Curve Settings) Adjust the brightness of an image by selecting the type of graph (tone curve) showing the balance of tone input and output. You can make fine adjustments to the brightness of a specific area. Adjusting Tone Curve (Final Review) Make a final check of color adjustments. The final synthesized tone curve and the histogram derived from the subsequent image processing will be displayed. There are no settings to make in this screen. • For a color image, select a color in Channel to check either Red, Green , or Blue , or select Master to check three colors together. • If you place the cursor on the preview image, the portion will be enlarged and its RGB values (only L when Color Mode is Grayscale ) before and after the adjustments will be displayed. (Threshold) Set the boundary (threshold) at which black and white are divided. By adjusting the threshold level, you can sharpen text in a document or reduce show-through in newspapers. Setting Threshold Custom You can name and save a set of tone curve and threshold settings of the Color Adjustment Buttons. Select Add/Delete... from the pull-down menu; when Color Mode is set to anything but Black and White , the Add/Delete Tone Curve Settings dialog box opens; when Color Mode is Black and White , the Add/Delete Threshold Settings dialog box opens. 698
Enter Setting Name and click Add; the name appears in Tone Curve Settings List or Threshold Settings List . Click Save to save. To delete an item, select it in Tone Curve Settings List or Threshold Settings List and click Delete. Click Save to save the settings displayed in Tone Curve Settings List or Threshold Settings List . You can load and apply the saved tone curve/threshold settings to a preview image. To load the settings, select the saved item from the pull-down menu. Note • Save up to 20 items. Defaults Reset all adjustments (saturation/color balance, brightness/contrast, histogram, and tone curve). 699
Preferences Dialog BoxIn the Preferences dialog box, you can make advanced settings to ScanGear (scanner driver) functions via the Scanner , Preview , Scan , and Color Settings tabs. Click Preferences... in the ScanGear screen to open the Preferences dialog box. Scanner Tab Allows you to set the quiet mode, specify the folder in which to save images temporarily, and set the music file to play during or at the end of a scan. Preview Tab Allows you to select what to do with Preview when ScanGear is started, how to display cropping frames after previewing images, and the cropping size for thumbnails of scanned documents. Scan Tab Allows you to select what to do with ScanGear after scanning image. Color Settings Tab Allows you to select how to adjust color, and specify the monitor gamma value. 700