Konica Minolta IV instruction manual Unsharp mask, With mask Original image

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Unsharp mask

The unsharp mask sharpens edges in the image without affecting overall image contrast. This mask can be used with soft or slightly out-of-focus images. The effect of the unsharp mask is very subtle, but makes a significant improvement to the overall appearance of the image.

Click the unsharp-mask button to open the unsharp-mask dialog box.

Drag the sliders or enter values in the text boxes to adjust the parameters of the mask. The full effect of the unsharp mask cannot be evaluated in the prescan image. It can only be judged in the final scan.

The result of the unsharp mask differs with image resolution. Make several scans with slight changes to the output resolution until the intended result is produced. Clicking the reset button restores the default settings.

Amount: to adjust the contrast of the mask between 0% and 500%. If the value is too high, pixilation will be apparent; the image becomes noticeably rough or grainy. 150% to 200% is recommended for high- quality printed images.

Radius: to increase the edge sharpness of the pixels. The radius can be adjusted between 0.1 and

5.The default setting is 1. Changes to the radius are more apparent on printed images than images displayed on a monitor. A level of 1 to 2 is recommended for high-quality printed images.

With mask

Original image

Threshold level: adjusted in integers between 0 and 255. The default setting is 2. If the difference between the surrounding pixels is greater than the threshold level, that pixel is recognized as a sharp subject pixel. When the level is set to 0, the whole image is corrected. The threshold level can separate smooth or even areas from edges and detailed areas to be sharpened.

Shadow protection level: to limit the sharp subject pixels in the shadows. The level can be adjusted in integers between 0 and 255. The default setting is 16. When the luminance level is greater than the shadow protection level, that pixel is recognized as a sharp pixel.

72 ADVANCED IMAGE PROCESSING

Image 72

Contents Page Tone-curve corrections Selective-color paletteBefore YOU Begin For Proper and Safe USE DiMAGE Scan Dual Table of Contents Page Table of Contents Installation Before installing the DiMAGE Scan UtilityNames of Parts DiMAGE Scan system requirements Additional memory requirements Adobe Photoshop ElementsWindows Page Macintosh Page Scanner Setup Before connecting the scanner to a computerConnecting the USB cable Connecting the AC adapter Disconnecting the scannerTurning on the scanner Where is the emulsion? Loading the Film HoldersHandling film Loading 35mm film stripsLoading mounted slides Loading a film holder into the scannerUsing the APS Adapter AD-10 sold separately Ejecting a film holder APSDimage Scan Launcher Easy Scan Utility Launching the Easy Scan UtilityUsing the Easy Scan Utility Scanner Notes MacintoshOn next Easy Scan Utility Page Basic Scanning Launching the DiMAGE Scan UtilityScanning basics Scanner setup Main window and index scan tabMaking an index scan Selecting index thumbnailsFlip and rotate images Fit-to-window buttonMain window and prescan tab Making a prescanGrab tool Magnifying toolAuto cropping CHP button APS filmMaking the final scan Tiff BMP Pict Basic Image Processing Main window and image-correction tabPixel Polish Auto Dust Brush Auto Dust Brush retouching levelVariation palette Brightness, contrast, and color balance palette An introduction to color GreenComparing pre and post-correction images Undoing and redoing image correctionsQuitting the DiMAGE Scan Utility Setting scanner preferences Advanced ScanningPage Exposure-control tab Saving exposure settings Loading exposure settingsMore index scan functions Reverse frame orderSaving the index thumbnails Saving an index fileLoading an index file More prescan functions Point AF AutofocusManual focus Manual cropping Autoexposure AE area selectionInputting scan settings manually About resolution and output size Scan setting examples Saving scan settings as a Job Deleting a JobAdvanced Image Processing More image-processing toolsDigital Grain Dissolver Prescan display Sample display areaUsing tone curves Tone curve and histogram paletteDrawing tone curves by freehand Short guide to tone curve corrections About the tone curveIncreasing image contrast Histogram corrections Tone curve / histogram auto setting Short guide to histogram corrections Konica Minolta HistoryPage White, gray, and black point corrections Setting the white and black-point values Tracking image corrections Snapshot buttonHue, saturation, and lightness palette About RGB and CMY Unsharp mask With mask Original imageSaving image corrections Loading image-correction JobsCustom Wizard Page Batch Scan Utility Page Advanced Batch Scan setup Page Setting the output color space Color MatchingOutput color spaces Ntsc CIE RGBSetting the monitor ICC profile Scanner color profilesColor matching recommendations Output Color Space Monitor RGBBefore installing the plug-in Installation WindowsAuto Dust Brush PLUG-IN Page Installation Macintosh Using the Auto Dust Brush plug-in Auto Dust Brush PLUG-IN Appendix Glossary of common termsUninstalling the DiMAGE Scan Software Installed files and folders WindowsJob file list 35mm Troubleshooting Checking software installation Windows Technical Specifications Warranty and product registration Technical supportRecord keeping Image Data Sheet Image processingHue corrections