User manual NIKON SCAN MACINTOSH

[. . . ] Before You Begin 2. 1 System Requirements 2. 2 Software Installation 3. Basic Operations 3. 1 Launching and Quitting 3. 2 Main Dialog Box 3. 3 Basic Scanning Scanner Plug-in Software Nikon Scan Macintosh 4. Scanning Conditions 4. 1 Choosing the Scanner 4. 2 Setting the Application Gamma 4. 3 Positioning Media 4. 4 Ejecting Film (film scanners only) 4. 5 Choosing the Media Type 4. 6 Crop/Preview Area Buttons 4. 7 Cropping 4. 8 Crop Size Control 4. 9 Autofocus (film scanners only) 4. 10 Adjust Focus (film scanners only) 4. 11 Autoexposure 5. Image Compensation 5. 1 Brightness / Threshold 5. 2 Contrast 5. 3 Color Balance 5. 4 Level Display User's Manual -1- 6. [. . . ] Please see the appendix appropriate to the scanner you using. The prescanning operation begins immediately on your selecting the Autoexposure function from the Special Capabilities submenu. - 30 - 5. Image Compensation This chapter explains how to adjust continuous tone brightness, line art threshold, contrast, and color balance. All these settings are made using buttons or text edit boxes. The results of compensation can be checked with a preview scan. The appearance of the Main dialog box depends on the Media Type setting, as shown below. 5. 1 Brightness / Threshold This control is used to set the brightness for a Color or Grayscale image, or the threshold value for a B&W Line Art image. When this button is clicked and held down, a slider bar pops up. The value is set by dragging the slider to the left or right while holding down the mouse button. The same result can be achieved by entering a value directly in the box to the right of the button. Color Grayscale B&W Line Art When the slider is dragged in the plus direction, the images will be brighter and the black point will begin to float above maximum black. When dragged in the minus direction, the images will become darker and dimmer. For a B&W Line Art image, the set value is the threshold value. Brightness adjustment range: Threshold adjustment range: -100 to 100 0 to 255 - 31 - 5. 2 Contrast This control is used to set the contrast for Color or Grayscale images. A contrast setting is not used for B&W Line Art images. 5. 3 Color Balance The color balance is adjusted using three controls for Red, Green, and Blue. These three controls only appear when `Color' has been set as the Media Type. Red When this button is clicked and held down, a slider bar pops up. The value is set by dragging the slider to the left or right while holding down the mouse button. The same result can be achieved by entering a value directly in the box to the right of the button. Green Blue When one of these buttons is clicked and held down, a slider bar pops up. The value is set by dragging the slider to the left or right while holding down the mouse button. The same result can be achieved by entering a value directly in the box to the right of the button. When the slider is dragged in the plus direction, the black point and white point input values will be restricted, thus steepening the tone curve and producing punchier images with less gradation subtlety. When dragged in the minus direction, the black output values will be raised and the white point output values lowered, thus flattening the tone curve and producing `flatter' or `muddier' images with more gradation subtlety. Adjustment range: -100 to 100 You can adjust overall color balance by emphasizing or deemphasizing each of the three primary colors of the scan. Unlike brightness compensation, in which the amount of the Red (R), Green (G), and Blue (B) components in the image are changed simultaneously, affecting the brightness of the image as a whole, color balance adjustment permits individual compensation for each of these colors. Adjustment range: -100 to 100 - 32 - 5. 4 Level display RGB values or CMY percentages at the cursor position are displayed while the cursor is over the crop/preview area. [. . . ] Highest Speed: Preview with emphasis on speed Normal: Highest Quality: Preview with emphasis on quality Normal preview Select one of the following from the Final Scan Quality submenu. Highest Speed: Scan with emphasis on speed Normal: Highest Quality: Scan with emphasis on quality Under normal circumstances the best choice is Highest Quality. Normal scan - 50 - B. 4 Make Shading After replacing the lamp, you must perform lamp calibration using the Make Shading function before you can operate the scanner (to replace the lamp, follow the directions given in the LS-4500AF hardware manual). You must use this function whenever you replace the lamp. [. . . ]