User manual AVISION AV8350

[. . . ] User's Manual Document Imaging Scanner Avision Inc. (D/N: 250-0505-E Rev. registered trademark of Microsoft Corporation. Windows and MS-DOS are trademarks of Microsoft Corporation. IBM, PC, AT, and XT are registered trademarks of International Business Machines Corp. [. . . ] Choose 24-Bit Color if you are scanning color photos. 24-Bit Color Image 6-10 6. 4 ENHANCING YOUR IMAGE Brightness: Adjusts the lightness or darkness of an image. The higher the value, the brighter the image. 6-11 6. 5 CONTRAST Adjusts the range between the darkest and the lightest shades in the image. The higher the contrast, the bigger the different gray scales. 6-12 6. 6 INVERT IMAGE The invert command reverses the brightness and the color in the image. For color images, each pixel will be changed into its complementary color at the command of Invert. Original 6-13 6. 7 MIRROR Click on the Mirror button to reverse the image (create a mirror image). Mirror function is off Mirror function is on 6-14 6. 8 PREVIEW AUTO-AREA: Clicking on the Preview Auto-Area button automatically crops the preview scan area to the previewed document. This will then be the cropping area for all of the scanned documents. 6. 9 PAPER SIZE: Select a size on the Paper Size list of frequently used scan sizes, including business card, 5 x 3 in. , 6 x 4 in. , Letter, Legal, B5, A5, A4, A3, or your current scan area to perform an immediate selection of your scan size. 6. 10 UNITS The Units button indicates the measuring system that is in use (Inch, Cm, or Pixel). 6-15 6. 11 DESCREEN Click on the Descreen button to access a drop-down menu that allows you to specify the type of document you are scanning in order to eliminate the moiré pattern* commonly found in printed matter. You can specify Newspaper, Magazine, or Catalog. Before Descreen After Descreen 6-16 *Moiré pattern--an undesirable pattern resulting from the incorrect screen angle of the overprinting halftone. 6. 12 SHARPEN Click on the Sharpen button to access a drop-down menu that allows you to specify a level to sharpen the scanned image. You can specify a Sharpen setting of Light, More, Heavy, or Extra Heavy. 6. 13 COLOR ADJUSTMENT Click on the Color Adjustment button to enable the button for the Hue, Saturation, and Lightness feature. NOTE: The Advanced Settings button must be enabled in order to use the Hue Saturation, and Lightness feature. 6-17 6. 14 AUTO LEVEL Click on the Auto Level button to add shadow to reveal more details in an image. 6. 15 ADVANCED SETTINGS Click on the Advanced Settings button to view the advanced settings buttons for Highlight / Shadow, Curves, Color Balance, Hue / Saturation / Lightness, Color Drop-out, and Custom Settings (six buttons on the right side of the TWAIN dialog box). Highlight / Shadow This feature is available when 8-Bit Gray, 8-Bit Color, or 24-Bit Color is selected on the Image Type drop-down menu. Highlight refers the lightest point in a scanned image; shadow refers the darkest point. Click on the Highlight / Shadow button to access the Highlight / Shadow Levels dialog box. You can type values in the text boxes or you can place the mouse cursor over the line, click the right mouse button, and drag the line to specify the values you want. 6-18 Use the Highlight and Shadow settings together to extend the range of color and reveal more details in a color image. 6-2 6. 16 CURVES When you select the Curves button, a dialog box appears that allows you to adjust the midtone of the image without losing details in the lightest and darkest areas. Select the Curve or Line button, depending on if you want a curved or an angled setting. Place the mouse cursor over the line, click the right mouse button, and drag the line to set the curve you want. 6-3 6. 17 COLOR BALANCE When you select the Color Balance button, a dialog box appears that allows you to adjust the color of the image so that it comes close to that of the original. The default parameters are used to adjust the image. You can type values in the Color Levels text boxes or you can drag the sliding arrow under the color. 6-4 Hue /Saturation /Lightness Click on this button to adjust the hue, saturation, and lightness of an image. This button is enabled when the Color Adjustment button is selected. You can type values in the text boxes or you can drag the sliding arrow under the each item. Hue--specify a value in the Hue box to adjust the hue up to 360° by clicking on the desired color on the color wheel or selecting a setting on the dropdown menu. Note that the level of intensity for a color simultaneously changes when the hue adjustment is made. Saturation--specifies a value in the Saturation box to adjust the saturation level of the color. The level of saturation indicates whether the color is pale or rich. Lightness--specifies a value in the Lightness box to adjust the color strength. NOTE: These options are available only when The Color Adjustment button is enabled. 6-5 6. 18 COLOR DROP-OUT This feature is available when Black and White, Halftone, or 8-Bit Gray is selected on the Image Type drop-down menu. Click on the Color Drop-out button to access a dialog box that allows you to choose to remove the R (Red), G (Green), or B (Blue) color channel while scanning. For example, if your image contains red text or a red background, choose R channel (red) to remove the red text or red background. [. . . ] 2) Remove the multi-fed sheets of paper. 4) Flatten the corners and edges; loosen the paper before reloading it in the paper guide. 5) Check the feeding roller condition and do the cleaning if necessary. Question: Paper becomes skewed in the scanner. [. . . ]