Canon FB636U, FB630U Adjusting Gamma with the Menu, CRT Type a, CRT Type B, CRT Type C, Linear

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S T E P 4

Adjusting Gamma with the Menu

[ ] You can select the display type with the menu and set the gamma curve. Use this feature when you see the brightness of the original image does not match the brightness of the image in the preview window or browser. In the menu if you can select CRT Type A, CRT Type B, or CRT Type C, or Linear, the optimum gamma settings will be performed for you automatically.

Hint

• You cannot use this feature with a Black & White (Line), color or high definition color file that has been set with ColorSync™.

•The gamma settings of display are intended to produce effects that emulate the reproduction of color tones that appear natural to the human eye. In order to achieve this and be able to accurately reproduce the tones of the original on the display, the display scanner gamma value must match the gamma value of the display.

CRT Type A

Select if the CRT Type B setting displays an image that is too bright.

CRT Type B

Use for a Macintosh display.

CRT Type C

Select if the CRT Type B setting displays an image that is too dark.

Linear

Select to restore the gamma setting to 1.

Hint

• If all the settings above produce an image of brightness that does not compare favorably with the original, calculate the reciprocal value of the display gamma value and enter the reciprocal value directly to perform the setting. (p. 48)

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Contents Users Guide How to Make Best Use of the Manuals Getting StartedWhere to Look How to Use this GuideAbout the Conventions Used in this Guide Table of Contents Adjusting and Editing Scanned Images AppendicesControl Panel Features E P Scanning ProceduresAdjusting and Editing Scanned Images Scanning Preparations pGamma Curve Adjusts Image Brightness Plug-in Module CS-U Special FeaturesSee the Results of Adjustments Immediately Dynamic Preview Supports ColorSync 2.0 or higher Auto Tone CorrectionStart Plug-in Module CS-U Installing Plug-in Module CS-UQuick Start Instructions Start the Preview ScanClick on the Browser button Set the preferences, magnification and scan mode settingsSpecify the Area of the Image to be Scanned p Select the area to be scanned by clicking and draggingSave the image with the application software, specifying a Scan the Image pClick on the Scan button Folder, file name and file formatE P E P Installing Plug-in Module CS-UOperating Environment E P Procedures Click the Install the Software buttonClick the Yes button to start the installation E P E P Scanning Preparations Display Plug-in Module CS-U Control Panel ButtonsAdobe PhotoDeluxe E P Operating ProceduresAdobe Photoshop Set the original on the scanner document glass PreviewingClick on the Preview button Set Preferences UnitE P Setting Basic Resolution Preview Window Settings Dialog Box E P Preview Window SizeSelect the Prefs menu in the control panel Return to Default SettingsE P Calibration Select the desired option from the pull-down menuOutput Device Resolution= 360 dpi, Magnification= 100% Set MagnificationE P To Set the Magnification Factor Set the desired magnification factor on the control panelBlack and White Mode Diffusion Dither Set Scan ModeBlack and White Mode Line Grayscale Mode 8-bitColor Mode 24-bit High Definition ColorTo Set the Scan Mode Select the scan mode that you wantVerify Image Before Scanning To Verify the ImageE P Scanning Scan Area Settings Position the pointer in the preview windowTo Zoom ZoomingSelect the area you want to enlarge with the zoom function Click on the Zoom In button To return to normal view, click the Zoom Out buttonTo Initiate the Scan ScanningSpecify the Scan Area Saving Scanned Images To Save an ImageBlack & White Mode Color ModeGrayscale Mode Diffusion DitherHow to Interpret Histograms Using the Histogram Feature to Adjust Image ContrastHow to Adjust Histograms Click the Auto button E P To Adjust a HistogramClick on the Histogram button Click on the OK buttonAdjusting the Image with Gamma Settings Setting the GammaGamma = GammaContrast Brightness and Contrast SettingsBrightness Click the gamma button E P To Adjust the Brightness and ContrastClick the OK button CRT Type B Adjusting Gamma with the MenuCRT Type a CRT Type CE P To Change the Gamma Value Settings Click the radio button for Menu SettingAdjusting the Gamma Value to Match the Display Gamma Value SettingsSending Output to a Printer Slider Tone Curve Settings Manipulating the GraphE P To Edit the Tone Curve Auto Tone Correction ColorSync To Activate the ColorSync FunctionDescreen ProcedureOpen the Image menu and select Descreen To Set the Threshold Value Set the threshold value in the Control PanelSaving / Recalling Settings To Save Settings in a Settings FileE P To Recall a Settings File Editing Scanned Images Many special effects may be achieved with filtersOptical and Enhanced Resolutions Matching Scan Resolution to PurposeScanning Techniques Functional Specifications SpecificationsSystem Requirements Problem TroubleshootingClicked on the Plug-in Module CS-U control panel Scan button cannot be selected Cause Error MessagesError Message ResponseGlossary Preview ResolutionImage File ScannerIndex P E N D I C E S Canon Customer Support Help Desk HelpdeskOE-030AA 0799 CDS Canon Inc