User manual MICROTEK PC R SWPRO 0805

[. . . ] Microtek ScanWizard Pro Reference Manual for Windows i Copyright 2005 by Microtek International, Inc. All rights reserved. Trademarks Microtek®, ArtixTM, and ScanWizardTM Pro are trademarks or registered trademarks of Microtek International Inc. Adobe® and Acrobat® are registered trademarks of Adobe Systems Incorporated. Macintosh® and Apple® are registered trademarks of Apple Computer, Inc. Windows® is a registered trademark of Microsoft Corporation. [. . . ] Press Alt key to switch tool into White Eyedropper and use it to assign the White (Highlight) Point setting. Release Alt key to revert back to Black Eyedropper tool. Enable this check box to show simulated effect of the adjustment on the prescan image Reference: The Settings Window 67 The Threshold dialog box (Line-art image) For line-art image, the White/Black Point tool becomes a Threshold correction tool. The threshold values are in the range of 0 through 255. Sharpen This option lets you further enhance line-art image quality if your original lineart material appears blur (e. g. , text printed by inkjet, dot matrix printer, or contains text of small points). 68 Microtek ScanWizard Pro for Windows Gradation Curve tool (LCH mode only) The Gradation Curve tool lets you control the gamma, which measures the intensity affecting the mid-level grays (midtones) of an image. Gamma is commonly used to describe the relationship between output density to the original density across the mid-tones. Adjusting the gamma lets you change the values of the middle range of gray tones without dramatically altering the shadows and highlights. In many ways, the Gradation Curve tool gives you the most control for adjusting an image's values, but beginners may take some time to master its intricacies. The Gradation Curve tool applies to grayscale and color images and is not available for use with line-art or halftone scan modes. How to read the curve Original curve: Straight diagonal line Modified curve with points moved up The curve shows the relationship of the brightness changes across the middle pixels between the resulting image and the original. When you open the Curves dialog box, the line on the graph is diagonal because the Input and Output values are the same. The x axis of the graph represents the original brightness values of the pixels, from 0 to 255, for 8-bit scanners (see the table on next page); the y axis represents the new brightness values. Clicking on the diagonal line then plots a point that can be adjusted. Reference: The Settings Window 69 Scan 8-bit color 10-bit color 12-bit color CMYK Gray Original brightness value 0 - 255 0 - 1023 0 - 4095 0 - 100% 0 - 100% In the above table, 100% indicates purely black. When the curve is moved up or down, the relationship between input value and output value changes accordingly. · In areas where the curve is moved down, pixels in that portion of the image are darkened. · In areas where the curve is moved up, pixels in that portion of the image are lightened. Contrast in an image can be seen by the angle of the line. The steeper the slope, the higher the contrast. The closer the line is to horizontal, the lower the contrast. 70 Microtek ScanWizard Pro for Windows The Gradation Curve dialog box The Gradation tool enables you adjust the toner distribution of an image to create a gradual transition between two or more colors. This is where LCH color system has its great advantage. With this tool you can easily change the brightness and contrast without affecting the gray balance and saturation of an image. This is because chroma and hue values are always kept constant. To prevent the color images from becoming too light or too dark, ScanWizard Pro provides a Saturation Range option. With this option, colors outside of a given chroma range will not be affected by the gradation curve manipulation. NOTE NOTE To separately adjust toner of individual RGB channel, a separate Tone Curve tool is provided for such purpose. [. . . ] As default, all checked boxes are checked, except for the All check box. The following options are available as general guidelines, where (x) indicates that a checkbox is checked for that particular preference. Please take note, however, that the default values may vary depending on the scanner model. Mac OS X Windows XP Preference Color Space White & Black Points Setup Default Value · Advanced (Native) · · · · · · · · · Auto Clipping: 0. 01% and 0. 01% Output Levels: 0% and 100% Markers: 0% and 100% For more details, see the White/Black Points Setup section in the Reference Manual. Embed ICC destination profile (x) RGB Profile: Kodak s RGB CMYK profile: Generic CMYK Auto Color Enhancement (x) For more details, see the Color Matching Setup section in the Reference Manual and page 8 of this Addendum. [. . . ]