Konica Minolta AF-2840 instruction manual Histogram corrections

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DIMAGE SCAN DUAL III UTILITY – IMAGE PROCESSING

Histogram corrections

Input shadow slider			Input highlight slider
	Input gamma slider			Input shadow text box
						Input gamma text box
								Input highlight		text box



Output shadow slider						Output highlight text box

	Output highlight	slider		Output shadow text box

The color histograms can be displayed with the channel list box or with keyboard shortcuts. While holding the control key (Windows) or command key (Macintosh), press 0 (zero) to display the RGB channel, press 1 to display the red channel, 2 to display the green channel, 3 to display the blue channel.

The histogram can be used to maximize the distribution of the pixels in the image. The highlight level, shadow level, and gamma can be set manually with the sliders or text boxes.

The input gamma slider defines the mid-tones of the image. Dragging the input gamma slider to the right will darken the image, and dragging it to the left will brighten it. Similar to the tone-curve correction described on page 74, the input gamma slider allows the brightness of the image to be adjusted without loosing image information.

The input highlight slider sets the white level. As the slider is moved to the left, an apparent increase in contrast can be seen in the displayed image. All pixels to the right of the slider are set to 255 and any image detail they may contain will be lost. This can be an important tool for improving copy images of text on a white background. Uneven illumination, or faded or stained paper can be distracting when copying text or line art. By adjusting the white level, the imperfec- tions of the white background can be eliminated leaving only the darker text visible.

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Contents AV-A209 Selective-color palette Tone-curve correctionsColor Examples Before YOU Begin Table of Contents Page Table of Contents Page For Proper and Safe USE Page Package contents System RequirementsIBM PC/AT compatible computers PolishBefore installing the utility software InstallationInstalling the utility software Windows Page Installing the utility software Macintosh Page Installing Adobe Photoshop Elements Launching the scanner utility from Photoshop ElementsWindows MacintoshNames of parts Before scanner setup Connecting the USB cableConnecting the AC adapter Disconnecting the scannerTurning on the scanner Turning off the scannerWhere is the emulsion? Film formatsLoading the film Handling filmLoading mounted slides Using the APS Adapter AD-10 sold separately Using the FH-U1 and SH-U1 film holdersLoading a film holder into the scanner Ejecting a film holder Launching the Easy Scan Utility Easy Scan UtilityUsing the Easy Scan Utility Canceling an index scan, prescan, or final scan Macintosh Page Pixel Polish button Auto Dust Brush button File types BMPDimage Scan Dual III Utility Basic scanning pAdvanced scanning p Image processing pLaunching 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 ScanningIndex scan Main window and index scan tabMaking an index scan Canceling the index scanSelecting index thumbnails Flip and rotate images Fit-to-window button Prescan Main window and prescan tabMaking a prescan Grab toolMagnifying tool Auto croppingManual cropping CHP button APS filmPrescanning the cropped area 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 settingsMore index scan functions Reverse frame orderSaving an index file Saving the index imagesLoading an index file Autoexposure control More prescan functions AE area selection AE lockFocusing the scanner More prescan functions Point AF AutofocusManual focus Inputting scan settings manually Scan setting windowAbout resolution and output size Scan setting examples Saving scan settings as a Job Deleting a JobCustom Wizard Page Setting the output color space Color matchingPage Setting the monitor ICC profile Scanner color profilesColor matching recommendations Output Color Space Monitor RGBMain window and image-correction tab Image processing toolsDimage Scan Dual III Utility Image Processing Tools and functions Effects Guide to image processing toolImage processing glossary Undoing and redoing image corrections Tracking image corrections Snapshot buttonComparing pre and post correction images Saving image correctionsLoading image-correction Jobs Complementary colorsVariation palette Brightness, contrast, and color balance palette Tone curve and histogram corrections Using tone curves Tone curve and histogram paletteDrawing tone curves by freehand Short guide to tone curve corrections Bringing out detail in the shadowsIncreasing image contrast Correcting colorHistogram corrections Tone curve / histogram auto setting White, gray, and black point corrections Setting the white and black-point values Selective-color paletteUnsharp mask Hue, saturation, and lightness palette 35mm film JOB File ListsAPS film Installed Files and Folders Mac OS 8.6 Mac OSTroubleshooting and Technical Support SolutionChecking Scanner Installation Windows Pixel Polish and Mac OSWarranty and product registration Technical supportTechnical Specifications RAMComplementary colors Primary RGB and secondary CMY colorsAN Introduction to Color HSB color model p Complementary colors pHue corrections Universal Copyright Convention AV-A209