Konica Minolta AF-2840 instruction manual Increasing image contrast, Correcting color

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Increasing image contrast

The contrast of an image can be changed. The light blue 45° line on the tone-curve graph represents the original contrast of the image. Making the angle of the tone curve greater than 45° will increase the contrast. Making the angle less than 45° will reduce the contrast.

With the RGB channel selected, click on the tone curve near the top and bottom to add two nodes. Slightly move the top node up and the bottom node down. This will increase the angle of the central por- tion of the tone curve and increase the contrast of the image without making an overall change in image brightness.

Correcting color

By selecting individual color channels on the tone curve, adjustments to the overall color of an image can be made. This can be used to eliminate unnatural color casts or add warmth to a pic- ture.

If the image is too red, green, or blue, simply drag the corresponding color- channel curve down until the color appears natural. If the color cast is pre- dominantly one of the secondary colors, cyan, magenta, or yellow, move the curve of the complementary color up. For example, if the image is too yellow, move the blue curve up, see the color example on page 2. For more on com- plementary colors, see page 90 and 91.

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Contents AV-A209 Tone-curve corrections Selective-color paletteColor Examples Before YOU Begin Table of Contents Page Table of Contents Page For Proper and Safe USE Page System Requirements Package contentsPolish IBM PC/AT compatible computersInstallation Before installing the utility softwareInstalling the utility software Windows Page Installing the utility software Macintosh Page Macintosh Installing Adobe Photoshop ElementsLaunching the scanner utility from Photoshop Elements WindowsNames of parts Connecting the USB cable Before scanner setupTurning off the scanner Connecting the AC adapterDisconnecting the scanner Turning on the scannerHandling film Where is the emulsion?Film formats Loading the filmLoading mounted slides Using the FH-U1 and SH-U1 film holders Using the APS Adapter AD-10 sold separatelyLoading a film holder into the scanner Ejecting a film holder Easy Scan Utility Launching the Easy Scan UtilityUsing the Easy Scan Utility Canceling an index scan, prescan, or final scan Macintosh Page Pixel Polish button Auto Dust Brush button BMP File typesImage processing p Dimage Scan Dual III UtilityBasic scanning p Advanced scanning pDimage Scan Dual III Utility Basic Scanning Launching the DiMAGE Scan Dual III UtilityLaunching the utility from an image-processing application Selecting the film format and typeMain window and index scan tab Index scanCanceling the index scan Making an index scanSelecting index thumbnails Flip and rotate images Fit-to-window button Main window and prescan tab PrescanAuto cropping Making a prescanGrab tool Magnifying toolCHP button APS film Manual croppingPrescanning the cropped area Auto Dust Brush Removing the effect of dust Main window and Pixel Polish tab Pixel Polish Correcting images automaticallyPage Making the final scan using Jobs Quitting the DiMAGE Scan Dual III Utility Dimage Scan Dual III Utility Advanced Scanning Setting scanner preferencesPage Exposure-control tab Loading exposure settings Saving exposure settingsReverse frame order More index scan functionsSaving the index images Saving an index fileLoading an index file Autoexposure control More prescan functions AE lock AE area selectionPoint AF Autofocus Focusing the scanner More prescan functionsManual focus Scan setting window Inputting scan settings manuallyAbout resolution and output size Scan setting examples Deleting a Job Saving scan settings as a JobCustom Wizard Page Color matching Setting the output color spacePage Scanner color profiles Setting the monitor ICC profileOutput Color Space Monitor RGB Color matching recommendationsImage processing tools Main window and image-correction tabDimage Scan Dual III Utility Image Processing Guide to image processing tool Tools and functions EffectsImage processing glossary Tracking image corrections Snapshot button Undoing and redoing image correctionsSaving image corrections Comparing pre and post correction imagesComplementary colors Loading image-correction JobsVariation palette Brightness, contrast, and color balance palette Tone curve and histogram corrections Tone curve and histogram palette Using tone curvesDrawing tone curves by freehand Bringing out detail in the shadows Short guide to tone curve correctionsCorrecting color Increasing image contrastHistogram corrections Tone curve / histogram auto setting White, gray, and black point corrections Selective-color palette Setting the white and black-point valuesUnsharp mask Hue, saturation, and lightness palette JOB File Lists 35mm filmAPS film Installed Files and Folders Mac OS Mac OS 8.6Solution Troubleshooting and Technical SupportPixel Polish and Mac OS Checking Scanner Installation WindowsTechnical support Warranty and product registrationRAM Technical SpecificationsPrimary RGB and secondary CMY colors Complementary colorsAN Introduction to Color Complementary colors p HSB color model pHue corrections Universal Copyright Convention AV-A209