Histogram Settings, How to Interpret Histograms | Canon N1220U

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Histogram Settings

The data comprising an image contains a variety of brightness settings ranging from shadows to highlights. These settings are represented in Plug-in Module CS-U by values ranging between 0 and 255. The difference in these values determines the image’s contrast. To show how much of the image data falls into each brightness setting, Plug-in Module CS-U contains a histogram feature that shows this data distribution clearly. With the histogram you can adjust the level of shadows and highlights to achieve beautiful tones with the best possible contrast.

Hint

• You can enhance images with the histogram options only when the image has been previewed in the color or grayscale scan modes.

•You cannot enhance the image with the histogram when ColorSyncTM is selected.

How to Interpret Histograms

You can select the entire image or specify an area for which a histogram will be generated. The height of the peaks of the histogram is directly related to the volume of data with the corresponding value.

Portion with

Highlights

Portion with

Shadows

Entire Image

Distribution of data with a bias toward highlights.

Distribution of data with a bias toward shadows.

Distribution of data widely distributed between shadows and highlights.

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Canon N1220U, N656U, N650U manual Histogram Settings, How to Interpret Histograms

Contents

Users Guide When you open the box How to Make Best Use of the Manuals Where to Look How to Use this GuideAbout the Conventions Used in this Guide Table of Contents Adjusting Scanned Images Operating Environment Installing Plug-in Module CS-U Image Size pp Control Panel Features E P Scanning Procedures See the Results of Adjustments Immediately Dynamic Preview Plug-in Module CS-U Special FeaturesGamma Curve Adjusts Image Brightness ColorSync Ver 2.0 + Compatible for Auto Tone Correction Quick Start Instructions Install Plug-in Module CS-UStart Plug-in Module CS-U Position materials for scanning and preview them Specify the Area of the Image to be Scanned Verify Image Quality with the Browser Function beforeClick on the Browser button Selection frame will appear Select the area to be scanned by clicking and dragging Save the Scanned Image p Scan the Image p E P RGB Values Displaying the Plug-in Module CS-U Control Panel Operating Procedures Positioning Originals ProceduresPlace the original on the scanners document glass Click on the Preview button Previewing Selecting the Output Device Output Device Resolution= 720 dpi, Magnification= 100% Setting the Resolution and Magnification Set the desired magnification factor on the control panel To Set the Magnification Factor Black and White Setting the Scan ModeGrayscale Color Documents Select a scan mode from the pop-up menu Click the arrow beside Scan Mode To Verify the Image Verifying the Image before Scanning Use these buttons to rotate the image Rotating the Image Output Device Setting PreferencesAspect Ratio Preview Window Unit Calibration Reset Default SettingsClose Plug-in After Scan Operating Procedures Scanning Position the pointer in the preview window Setting the Scan Area Zooming Procedures to ZoomSelect the area you want to enlarge with the zoom function Click on the Zoom In button To Initiate the Scan ScanningSpecify the Scan Area Click on the Scan button Enter a name for the file and click the Save button Saving Scanned Images Black & White Grayscale, Color Photos and Color DocumentsColor Photos and Color Documents Tone Adjustment Dialog Tone Adjustment How to Interpret Histograms Histogram Settings How to Adjust Histograms To Adjust a Histogram Shadow Mark Click on the OK button Manipulating the Graph Tone Curve Settings Click the OK button To Edit the Tone Curve Value = Relationship Between the Tone Curve Image Brightness Contrast Brightness and Contrast SettingsBrightness To Adjust the Brightness and Contrast Operating Procedure Adjusting the Color Balance Matching the Gamma Value to the Display Characteristics Gamma Value SettingsGamma value To Change the Gamma Value Settings To Set the Threshold Value Adjusting the Threshold Value To Set the Auto Tone Correction Auto Tone CorrectionStandard ColorSync Open the Image menu and select Unsharp Mask Unsharp Mask Open the Image menu and select Descreen Descreen To Save Settings in a Settings File Saving/Recalling SettingsClick the Save button To Recall a Settings File Optical and Enhanced Resolutions Matching Scan Resolution to PurposeScanning Techniques Appendices Troubleshooting Problem Scan button cannot be selected Error Message Error MessagesCause Response Auto Tone Correction GlossaryBits/Bit Numbers Black Eyedropper Tool Dot Color Channel Image File HistogramMagnification Resolution Optical ResolutionMoiré Pixel Shadows Scan ModeThreshold Value Tone Curve Output device 7, 11, 18, 25 IndexPage Canon Computer SYSTEMS, INC Canon Customer Support Help Desk OE-040AA 052000 CDS Canon Inc