Canon printer MAXIFY MB5020 User Manual
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Correcting Images (Unsharp Mask, Reduce Dust and Scratches,Fading Correction, etc.) The Image Settings functions on the Advanced Mode tab of ScanGear (scanner driver) allow you to enhance the outline of the subjects, reduce dust/scratches, and correct faded colors when scanning images. Setting Items Click (Arrow) of a function and select an item from the pull-down menu. Important • Do not apply these functions to images without moire, dust/scratches, or faded colors. The color tone may be adversely affected. • Refer to "Image Settings " for details and precautions on each function. Note • Refer to "Scanning in Advanced Mode " to start the Advanced Mode tab of ScanGear and scan. Adjusting the image brightness and color tone Set Image Adjustment to Auto , Photo , Magazine , or Document according to the document type. NoneAuto 661
Reducing show-through in text documents or lightening the base color inrecycled paper, newspapers, etc. when scanning documents Set Reduce Show-through to ON . OFFON Sharpening slightly out-of-focus images Set Unsharp Mask to ON . OFFON Reducing gradations and stripe patterns Set Descreen to ON . OFFON 662
Note• Printed photos and pictures are displayed as a collection of fine dots. "Moire" is a phenomenonwhere 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. Reducing dust and scratches Set Reduce Dust and Scratches to Low , Medium , or High according to the degree of dust and scratches. NoneMedium Correcting photos that have faded with time or due to colorcast Set Fading Correction to Low , Medium , or High according to the degree of fading or colorcast. NoneMedium Reducing graininess Set Grain Correction to Low , Medium , or High according to the degree of graininess. NoneMedium Correcting shadows that appear between pages when scanning open booklets Set Gutter Shadow Correction to Low , Medium , or High according to the degree of shadows. NoneMedium 663
Adjusting Colors Using a Color PatternYou can preview color changes and reproduce natural colors by using the color pattern function in ScanGear (scanner driver)'s Basic Mode tab. Color Adjustment Correct 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. Click an arrow in Color Adjustment to emphasize the corresponding color. Cyan & red, magenta & green, and yellow & blue are complementary color pairs (each pair produces a shade of gray when mixed). You can reproduce the natural colors of the scene by reducing the cast color and increasing the complementary color. It is recommended that you find a portion in the image where it should be white, and adjust the colors sothat the portion turns white. 665
Preview image appears in the center. Preview image colors change as you adjust them. Below is an example of correcting a bluish image. Since Blue and Green are too strong, click the Yellow and Magenta arrows to correct. BeforeAfter Note • Color adjustments are applied only to the cropping frames (scan areas) or the frame selected in thumbnail view. • You can select multiple frames or cropping frames by clicking them while pressing the Ctrl key. • You can also select a color tone from the color pattern displayed on the left of the Color Pattern screen. • You can also use this function to add a specific tint to an image. Increase the magenta to add a warm tint, and increase the blue to add a cool tint. 666
Adjusting Saturation and Color BalanceYou can brighten colors that have faded with time or due to colorcast by using (Saturation/Color Balance) in ScanGear (scanner driver)'s Advanced Mode tab. Note • Click Defaults to reset all adjustments in the current window. Saturation Adjust the image's saturation (vividness). You can brighten colors that have faded with time, etc. Move (Slider) under Saturation to the left to decrease the saturation (darken the image), and to the right to increase the saturation (brighten the image). You can also enter a value (-127 to 127). Saturation decreasedOriginal imageSaturation increased Note • The natural color tone of the original image may be lost if you increase saturation too much. Color Balance Adjust images that have a colorcast. "Colorcast" is a phenomenon where a specific color affects the entire picture due to the weather or ambient strong colors. 667
Move (Slider) under Color Balance to the left or right to emphasize the corresponding color. Cyan & Red Magenta & Green Yellow & Blue These are complementary color pairs (each pair produces a shade of gray when mixed). You can reproduce the natural colors of the scene by reducing the cast color and increasing the complementary color. It is usually difficult to correct the image completely by adjusting only one color pair. It is recommended that you find a portion in the image where it should be white, and adjust all three color pairs so that the portion turns white. You can also enter a value (-127 to 127). Below is an example of an image in which the "Cyan & Red" pair has been adjusted.Cyan is increasedRed is increased 668
Adjusting Brightness and ContrastYou can adjust images that are too dark or bright, or too flat due to lack of contrast by using (Brightness/Contrast) in ScanGear (scanner driver)'s Advanced Mode tab. Note • Click (Down arrow) to switch to detailed view. Click (Up arrow) to return to the previous view. • Click Defaults to reset all adjustments in the current window. 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 . 669
Brightness Adjust the image brightness. Move (Slider) under Brightness to the left to darken and right to brighten the image. You can also enter a value (-127 to 127). DarkenedOriginal imageBrightened Note • Highlights may be lost if you brighten the image too much, and shadows may be lost if you darken the image too much. Contrast "Contrast" is the degree of difference between the brighter and darker parts of an image. Increasing contrast will increase the difference, thus sharpening the image. Decreasing contrast will decrease the difference, thus softening the image. Move (Slider) under Contrast to the left to decrease and right to increase the contrast of the image. You can also enter a value (-127 to 127). Decreased contrastOriginal imageIncreased contrast Note • Increasing the contrast is effective in adding a three-dimensional feel to soft images. However, shadows and highlights may be lost if you increase the contrast too much. 670