User manual MICROTEK MACX M SWPROTX 0203

[. . . ] Microtek ScanWizard Pro TX User Guide For Mac OS X Copyright © 2003 by Microtek International, Inc. All rights reserved. Trademarks MicrotekTM, ArtixTM, ScanWizardTM Pro, and ArtixScanTM are trademarks of Microtek International, Inc. Macintosh® and Apple® are trademarks or registered trademarks of Apple Computer, Inc. All other products or name brands are trademarks of their respective holders. Important Documents that you scan may be protected under copyright law. The unauthorized use of such documents could be a violation of the rights of the copyright holder. [. . . ] the Native color model, as well as other concepts important to optimizing your workflow. The scenarios provided are based on the Advanced Image Correction tools available through the LCH color model. Native Color Mode · Workflow for Optimizing Images · How to Use CustomSettings · How to Choose the Right Image Category · Using the Dynamic Range Tool · Using the Black / White Points Tool · Using the Gradation Tool · Using the Color Cast Tool · Using the Saturation Tool · Using the Selective Color Tool · Using the Tone Curve Tool · Using the Filter Tool ScanWizard Pro for Macintosh User's Guide 23 The LCH Color Model One of the strengths of ScanWizard Pro TX is its ability to let you work in the LCH color space. Unlike the RGB color model, which corresponds to the color space as defined in monitors and printers, the LCH color model is a more intuitive way of working with colors, based on the values of Lightness (the "L" in LCH), Chroma (C), and Hue (H). For instance, if you wish to change the color of the sky in an image to a darker blue, your own eye -- and your own judgment -- will be the guide to making those color changes. This is easier than, say, knowing the mathematical equivalent in RGB or CMYK values that would correspond to a "dark sky blue". The LCH model, in effect, makes it easier to comprehend colors as they are couched in the terms we are familiar with: Lightness (how dark or light a color is), Chroma or saturation (how rich or dull a particular hue of green is), and Hue (the property that distinguishes, say, the color red from the color blue. ) In the LCH color model, colors of equal brightness lie on a single plane of the model, as shown below. Red and green lie opposite each other on the horizontal axis, as blue and yellow lie opposite each other on the vertical axis. On the color sphere shown below, you can see how the different LCH properties play out: · · · The different hues (red, green, yellow, blue) are spread around the sphere. The chroma (saturation) for each hue increases from the center of the sphere outward, with the most saturated colors lying on the edge of the sphere. The brightness values increase from the bottom of the model to the top 24 ScanWizard Pro TX for Mac OS X User Guide Selecting LCH or Native Color Space ScanWizard Pro TX lets you choose the color space in which you wish to edit and work with color images. · Select LCH mode if you wish to edit or correct images in terms of color perception according to the human eye, based on the properties of Lightness, Chroma, and Hue. · Select Native mode if you wish to edit or correct the individual RGB / CMYK channels of an image. To switch between LCH and Native color modes, go to the Preferences | More. . . When the More Preferences dialog box comes up, go to the Working Color Space option, and choose LCH or Native as the color mode you wish. ScanWizard Pro for Macintosh User's Guide 25 Workflow for Optimizing Images To prepare and optimize your images for the final scan, we recommend the use of the Advanced Image Correction (AIC) tools in the sequence that they appear in the Settings window if there are any adjustments to be made. Following this order will significantly influence the overall quality of your images. 1 Dynamic Range Manual or auto determine image density range (darkest tone to lightest tone) 2 White & Black Points Manual or auto-adjust shadow and highlight points 3 Gradation Manual or autoadjust midtones of the Lightness channel "L" Saturation Curve Adjust image saturation by manipulating the saturation curve Tone Curve Adjust tonal distribution of each channel of a CMYK/ RGB image 5 Note: If you are working in Native Color mode, the workflow sequence is the same for using the AIC tools. However, the Gradation, Color Cast, Saturation, and Selective Color tools (#3 to #6) will not be available. The Brightness / Contrast and Color Correction tools are offered in their place. 4 Color Cast Adjust gray balance by removing color cast or adjust desired cast by adding color cast 6 Selective Color Manipulate a specific color range without affecting other colors 7 8 Filter Apply a particular filter for special effects (e. g. , unsharp masking to sharpen image) 26 ScanWizard Pro TX for Mac OS X User Guide How to Use Custom Settings Each AIC tool has a pop-up menu with preset settings, as well as options that let you define custom settings. If you use a lot of filters, for example, you can create custom settings for each type of filter that is used, and you can then remove them at will when they are no longer needed. To use custom settings, click the pop-up menu and choose Add New Custom Setting or Remove Custom Setting, as the case may be. The Custom Settings pop-up menu at the Settings window is exactly the same as that found in the AIC dialog box. ScanWizard Pro for Macintosh User's Guide 27 How to Choose the Correct Image Category ScanWizard Pro TX provides several image categories to choose from, which can influence the auto-correction function and provide a more accurate output image. To select the correct image category, go to the Settings window and choose the option you wish from the Image Category menu. [. . . ] Click OK to confirm the correction. Image corrected with Selective Color tool 40 ScanWizard Pro TX for Mac OS X User Guide Using the Selective Color tool Use the Selective Color tool to perform color corrrection on a specific color range without altering the other colors in an image. In the example below, the color of the blue sky is changed with an increase in saturation, but all other colors in the image are held constant and remain unchanged. The yellow exterior of the boat has also been changed to orange. 4 6 7 8 9 New button for defining succeeding colors to be changed 10 7 ScanWizard Pro for Macintosh User's Guide 41 Using the Tone Curve Tool The Tone Curve tool is used to adjust the tonal distribution of each channel of an image. It functions very much like the Gradation tool, except that it provides additional functions to allow separate adjustments of the tones in each RGB or CMYK channel, depending on the image type. [. . . ]