Canon FS 2710 manual Color Correction Histogram Setting, How to Interpret Histograms

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Color Correction - Histogram Setting

The data comprising an image contains a variety of brightness settings ranging from shadows to highlights. These settings are represented in Plug-in module FS by values ranging between 0 and 255. You can use the histogram to adjust the values assigned to particular dot to either 0 or 255, to change the distribution of brightness settings and to control the contrast.

The method is applicable to 8-bit grayscale, 12-bit grayscale, 24-bit color (when ColorSync™ is off) and 36-bit color images.

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.

Shadow (Level 0)

Highlight (Level 255)

How to Adjust Histograms

To change the contrast in an image, the distribution of data between shadows and highlights can be adjusted by dragging the shadow and highlight marks at the bottom of the histogram. All of the data lying to the outside (left) of the shadow mark is changed to a zero value and all of the data lying to the outside (right) of the highlight mark is changed to a 255 value. The examples below show adjustments to improve the contrast. Leave the setting on Auto Correction for histogram correction of most scanning jobs.

IMAGE Image with a bias			IMAGE Image with a bias			IMAGE Image with well
1	toward highlights		2	toward shadow	3		distributed data

Move the shadow mark	Move the highlight mark toward
toward the highlight end.	the shadow end.

Move both the shadow and highlight marks inward.

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Contents Users Guide How to Use this Guide Where to LookAbout the Conventions Used in this Guide Table of Contents Adjusting and Editing Scanned Images AppendicesControl Panel Features 65 p pScanning Procedures Adjust and Edit Scanned ImagesScan p Plug-in module FS Special Features Installing Plug-in module FS Quick Start InstructionsStarting Plug-in module FS Selecting the Film Type pDetermining the type of image that is required. pp Specifying the Area of the Image to be Scanned pClick on the Browser button Select the area to be scanned by clicking and draggingScanning the Image p Click on the Scan buttonSave to the target folder with the file name, file type, E P Installing Plug-in module FS E POperating Environment E P Procedure Click the Install Software itemInstall panel, select Photoshop LE and ScanExpert FS Click the Start Installation button at the lower rightScanning Preparations Displaying the Plug-in module FS Control Panel E P Operating Procedures Film Characteristics Selecting a Film TypePreviewing Place the film in the scannerSetting the Scan Mode Black & White Mode8bit Grayscale Mode 12bit Grayscale Mode FS2710 only24bit Color Mode 36bit Color Mode FS2710 onlyE P To Set the Scan Mode Selecting the Output Device Setting the Magnification Output Device Resolution= 360 dpi, Magnification= 100%Magnification and Resolution Picture scanned with the 24bit Color mode may produce files E P To Set the Magnification FactorSet the desired magnification factor on the control panel SliderSetting Preferences Output Device Setting Dialog BoxOutput Device Output Device Settings Dialog Box Select the appropriate devices from the listClick on the OK button E P Aspect Ratio Select the desired settings Aspect Ratio Dialog BoxUnit Settings Dialog Box E P UnitUnit Dialog Box Preview Window Settings Dialog Box E P Preview Window SizeSet the file size and preview image save option E P Selecting the Scan Settings Click on the Preferences menu and select Scan SettingsScan Settings Dialog Box E P Return to Default Settings Click the Yes button to reset the default settingsSetting the Auto Eject Function To Set the Auto Eject FunctionVerifying the Image Before Scanning To Verify the ImagePlace the mouse cursor inside the selection frame E P Scanning Scan Area Settings Adjust the size and position of the Selection ToolTo Specify the Scan Area with the Selection Tool Selection ToolZooming To ZoomClick on the Zoom In button Drag the selection frame to the desired positionClick the mouse button Scanning To Initiate the ScanSpecify the Scan Area Rotating or Reversing Images Before Scanning To Change the Orientation of an ImageSaving Scanned Images Click on the Photoshop LE File menu and select SaveClick the Save button Adjusting and Editing Scanned Images Optimum Adjustments for Image Quality Using color and film correctionColor Correction Histogram pBrightness/Contrast p Color Balance pGamma p Threshold pColor Correction Histogram Setting How to Interpret HistogramsHow to Adjust Histograms Portion with Highlights Shadows Entire ImageE P To Adjust a Histogram Automatically To Adjusting a Histogram ManuallyClick the histogram tab and perform the histogram settings Click on the Auto Correction buttonColor Correction Brightness and Contrast Settings Adjusting BrightnessAdjusting Contrast E P To Adjust the Brightness and Contrast Click the Brightness/Contrast tab to adjust the settingsClick on the Color Correction button in the control panel Color Correction Color Balance Click the OK button Color Correction Tone Curve Settings Tone CurveColor Correction with the Tone Curve E P To Edit the Tone Curve Click on the Tone Curve tab and edit the tone curveColor Correction Gamma Value Settings Matching the Gamma Value to the Display CharacteristicsGamma value E P To Change the Gamma Value Settings Click on the Gamma Value tab and edit the gamma valueAdjusts the brightness of dithered images Color Correction ThresholdClick the Clor Correction button Set the thresholdFilm Correction Focus Correction Auto FocusManual Focus Focus Setting Dialog Box E P To Select FocusClick on the Film menu and select the Focus option Click the Auto Focus button to select automatic image focusFilm Correction Exposure Adjustment 2700F Film Type Settings Adjust the exposureExposure Setting dialog box for FS2710 Click on the Film menu and select ExposureAuto Tone Correction ColorSync To Activate the ColorSync FunctionClick on the Image menu and select the ColorSync option Saving / 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 filtersSpecifications Functional SpecificationsSystem Requirements Troubleshooting WareProblem Problem Color correction function will not workError Messages Error Message CauseResponse List of Film Types 2700F only Mm FilmGlossary Resolution IX240 FilmNegative Film Positive FilmSymbols Index a FIndex G S PictIndex T Z 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