Unsharp mask | Konica Minolta AF-2840 manual

DIMAGE SCAN DUAL III UTILITY – IMAGE PROCESSING

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 settings 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 highly 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 highly quality printed images.

Threshold level: adjusted in integers between 0 and 255. The default

setting is 2. If the difference between the surrounding pixels is greater	Original image

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.

80

with unsharp mask

Image 80

Konica Minolta AF-2840 instruction manual Unsharp mask

Contents

AV-A209 Color Examples Tone-curve correctionsSelective-color palette Before YOU Begin Table of Contents Page Table of Contents Page For Proper and Safe USE Page Package contents System Requirements IBM PC/AT compatible computers Polish Installing the utility software Windows InstallationBefore installing the utility software Page Installing the utility software Macintosh Page Installing Adobe Photoshop Elements Launching the scanner utility from Photoshop ElementsWindows Macintosh Names of parts Before scanner setup Connecting the USB cable Connecting the AC adapter Disconnecting the scannerTurning on the scanner Turning off the scanner Where is the emulsion? Film formatsLoading the film Handling film Loading mounted slides Loading a film holder into the scanner Using the FH-U1 and SH-U1 film holdersUsing the APS Adapter AD-10 sold separately Ejecting a film holder Launching the Easy Scan Utility Easy Scan Utility Using the Easy Scan Utility Canceling an index scan, prescan, or final scan Macintosh Page Pixel Polish button Auto Dust Brush button File types BMP Dimage Scan Dual III Utility Basic scanning pAdvanced scanning p Image processing p Launching the DiMAGE Scan Dual III Utility Launching the utility from an image-processing applicationSelecting the film format and type Dimage Scan Dual III Utility Basic Scanning Index scan Main window and index scan tab Selecting index thumbnails Canceling the index scanMaking an index scan Flip and rotate images Fit-to-window button Prescan Main window and prescan tab Making a prescan Grab toolMagnifying tool Auto cropping Prescanning the cropped area CHP button APS filmManual cropping Auto Dust Brush Removing the effect of dust Pixel Polish Correcting images automatically Main window and Pixel Polish tabPage Making the final scan using Jobs Quitting the DiMAGE Scan Dual III Utility Setting scanner preferences Dimage Scan Dual III Utility Advanced ScanningPage Exposure-control tab Saving exposure settings Loading exposure settings More index scan functions Reverse frame order Loading an index file Saving the index imagesSaving an index file Autoexposure control More prescan functions AE area selection AE lock Focusing the scanner More prescan functions Point AF Autofocus Manual focus Inputting scan settings manually Scan setting window About resolution and output size Scan setting examples Saving scan settings as a Job Deleting a Job Custom Wizard Page Setting the output color space Color matchingPage Setting the monitor ICC profile Scanner color profiles Color matching recommendations Output Color Space Monitor RGB Dimage Scan Dual III Utility Image Processing Image processing toolsMain window and image-correction tab Image processing glossary Guide to image processing toolTools and functions Effects Undoing and redoing image corrections Tracking image corrections Snapshot button Comparing pre and post correction images Saving image corrections Loading image-correction Jobs Complementary colors Variation palette Brightness, contrast, and color balance palette Tone curve and histogram corrections Using tone curves Tone curve and histogram palette Drawing tone curves by freehand Short guide to tone curve corrections Bringing out detail in the shadows Increasing image contrast Correcting color Histogram corrections Tone curve / histogram auto setting White, gray, and black point corrections Setting the white and black-point values Selective-color palette Unsharp mask Hue, saturation, and lightness palette 35mm film JOB File Lists APS film Installed Files and Folders Mac OS 8.6 Mac OS Troubleshooting and Technical Support Solution Checking Scanner Installation Windows Pixel Polish and Mac OS Warranty and product registration Technical support Technical Specifications RAM AN Introduction to Color Primary RGB and secondary CMY colorsComplementary colors Hue corrections Complementary colors pHSB color model p Universal Copyright Convention AV-A209