Canon FB630U/FB636U manual Gamma Value Settings, Adjusting the Gamma Value to Match the Display

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S T E P 3

Gamma Value Settings

[ ] You can also set up the gamma curve by directly entering the gamma value (0.01- 10.00). Use this method when you cannot adjust the gamma value with the menu (p. 40).

Hint

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

Adjusting the Gamma Value to Match the Display

Normally the gamma setting does not have to be adjusted because Plug-in Module CS- U has been pre-set with the menu setting to match a true Macintosh display (CRT Type B). However, if you are using another display and after you adjust the gamma value with the CRT Type A or CRT Type C setting, and the images are still too light or too dark, then use the calculation method below to calculate and set the reciprocal value of the display value.

1		Plug-in
	=
		Module CS-U

Display gamma value		gamma value

			1
	For a display			= 0.56
			1.8	= 0.56

	gamma value
	of 1.8 ...

Sending Output to a Printer

The gamma value does not have to be adjusted for output to a color printer because the printer driver settings are set to match the display, and matching the gamma setting of the display does not present a problem. Similarly, the gamma setting does not have to be done for a monochrome printer.

For fine adjustment, view the image on the display to view the results of your output.

Hint

• If you do not know the gamma setting of your display, refer to the manual provided with purchase of the display. If you do not find the gamma value in the manual, or if the manual is not available, contact the manufacturer of your display.

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Contents User’s Guide This page intentionally left blank How to Use this Guide Where to LookAbout the Conventions Used in this Guide Table of Contents Appendices Control Panel Features Scanning Procedures E 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 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 the Scan button Folder, file name and file formatE P Display Plug-in Module CS-U Control Panel E PE P Operating Procedures Canon PhotoPreviewing Set the original on the scanner document glassClick the Preview button Set Preferences UnitE P Setting Basic Resolution Preview Window Settings Dialog Box E P Preview Window SizeE P Calibration Return to Default SettingsProcedures Select the Prefs menu in the control panelOutput Device Resolution= 360 dpi, Magnification= 100% Set MagnificationE P To Set the Magnification Factor Set the desired magnification factor on the control panelDiffusion Dither Set Scan ModeBlack & White GrayscaleColor 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 windowZooming To ZoomSelect the area you want to enlarge with the zoom function Click the Zoom In button To return to normal view, click the Zoom Out buttonScanning To Initiate the ScanSpecify the Scan Area Saving Scanned Images To Save an ImageBlack & White Mode Color/High Definition ModeGrayscale Mode Diffusion DitherUsing the Histogram Feature to Adjust Image Contrast How to Interpret HistogramsHow to Adjust Histograms Click the Auto button E P To Adjust a HistogramClick the Histogram button Click the OK buttonAdjusting the Image with Gamma Settings Setting the GammaGamma = GammaBrightness and Contrast Settings ContrastBrightness E P To Adjust the Brightness and Contrast Click the Gamma buttonCRT 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 SettingGamma Value Settings Adjusting the Gamma Value to Match the DisplaySending 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 FunctionProcedure DescreenOpen 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 filtersMatching Scan Resolution to Purpose Optical and Enhanced ResolutionsScanning Techniques Specifications Functional SpecificationsSystem Requirements Troubleshooting ProblemClicked 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 Care Center Mail support via Canon Computer Systems, IncOE-030AA 0799 CDS Canon Inc