Better Light 7 manual Brightness/Contrast Tone Curve Adjustments

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The second method for 16 bits per color images is selected by clicking on the small button. The current tone curve will be applied to the image in 16-bit mode. The resulting file size will be dou- bled as it was for “None 14-bit”, but will open in the image processing application (e.g. Photoshop) with a normal visual range.

Brightness/Contrast Tone Curve Adjustments

Any existing tone curve can be altered by first selecting the tone curve from the Tone Curve popup menu. Changes can be made to the curve with the Brightness/Contrast buttons or by direct manipulation of the graphic curve display.

There are two sets of buttons on the upper-right side of the tone curve graph. The ones marked with the symbol are the Increase /Decrease Brightness buttons. Clicking the Increase Brightness button will shift the tone curve to the left in the graph (towards the darker end of the EV scale) which will increase the brightness of the exposure. This is because the values produced by the sensor (EV numbers) are not changing, but their location on the tone curve is. By moving the tone curve toward the darker exposure values, the original exposure values now fall on a higher position on the curve. In the same manner, clicking on the Decrease Brightness button will shift the curve to the right (toward the lighter end of the EV scale), thus making the sensor exposure values shift toward the darker end of the curve. Since the Increase and Decrease Brightness buttons do not change the slope of the curve, there is no change in contrast. These buttons may be used to “push” or “pull” any of the standard curves. If the brightness is increased or decreased to it’s limit, it will gray out to indicate that no fur- ther adjustments may be made for the current curve.

The second set of buttons, in the middle-right side of the tone graph, marked with the symbol are the Increase /Decrease contrast buttons. Clicking on either of these buttons will change the slope of the tone curve, thus changing the contrast.

Using the contrast buttons causes the tone curve to pivot from the center handle on the tone curve. Check to see that this center handle is where you want to pivot (handle 3 of 5 or handle 4 of 7).

With each click of Increase Contrast button the slope of the tone curve increases (the line moves more toward vertical). This is because the sensor exposure values above the middle of the curve are now falling on a higher portion of the curve while exposure values below the middle of the curve now fall on a lower portion of the curve. Since contrast is a measure of the perceived brightness in an image, increasing the tone curve’s slope pushes more pixels toward the light and dark ends of the curve. When the Decrease Contrast button is clicked, the slope of the tone curve is reduced (the line moves toward the horizontal) with more pixels being moved from the lighter and darker regions toward the midtones.

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Contents Large Format Digital Scanning Camera System Revision D MarchAcknowledgements Page Page Contents Lock Crop Ratio Locking BothAudio Focusing Aid Multiple Color Focusing Altering Color Balance for Mood or EffectSaving a High Bit Depth Image Limit LineExporting Notes Automatically Opening the ImageLighting Hardware Setup Software OperationLine Time Parts List Connector Identification Installing and Configuring the ViewFinder Software Getting StartedMemory Requirements System RequirementsMacintosh PC PC version of the software is requiredQuick Start Guide Connect the camera insert to the control unitConnect the control unit to the host computer Mate the female end of the cable with the DBConnect the AC power to the control unit Install the viewing overlay on the camera’s ground glassTurn on the digital camera Turn on the host computerInstall the infrared blocking filter Mm thick Tungsten infrared blocking filterSelect the image capture settings Compose and focus the imagePut the insert into the camera Start the ViewFinder softwarePrescan Take the pictureTransfer the file to the computer View the final imagePrescanning Making a PrescanFast Prescans Cropped Prescans Super View Prescans Color Managed Prescans Canceling a PrescanSaving and Viewing Prescans Rulers GuidesImage Capture Settings ResolutionPage Line Time ISO Capture Mode Exposure LockScanning to the Camera Disk Canceling a ScanScanning Naming the Image Automatically Naming ImagesAdding Notes to Your Picture RGB Data Values, EV Units Exposure EvaluationDigital Spot Metering Determining Relative Exposure Static Spot Meter Tool Setting the Spot Meter Size Histogram Judging Overall and Spot ExposuresStatic Spot Meter Location Readings Hand Tool Tool BarMagnify Tool Measure Tool Mac only Panorama ToolToneZones Tool Page Crop Mask Tool Grid ToolPage Scan Area & Cropping Tab PanelsSize Panel Size of the cropped area may still be adjusted while Different unit. Example 15.24 cm x 10.16 cm at 300 pixels perLock Crop Ratio To set a specific shape for crop rectangle Clicking up or down buttons of Scan AreaLock File Size To specify an exact file size Faster Scans for Free Seconds Scan directionColor Panel Establishing Neutral Color BalanceSaving Color Balances Altering Color Balance for Mood or Effect Changing Existing Color BalancesDeleting Color Balances Reverting to a Previous Color Balance Tagging Images with ICC ProfilesTone Panel Tone Curve SelectionsSaving a High Bit Depth Image Brightness/Contrast Tone Curve Adjustments Manual Tone Curve Adjustments Limit Line Spot Meter Reference PointsNegative Curves Bit Tone CurvesSelecting an Output Tone Scale Setting the EV Scale ReferenceTone Curve Histogram Saving Tone Curves Deleting Tone CurvesFocus Panel Large Focus DisplaySelecting a Focus Site Reading the Focus Displays and Adjusting Focus Audio Focusing Aid Mac only Multiple Color FocusingInfrared Focus Image File Management and Retrieval ViewFinder File Manager Exporting Notes Sorting Image FilesAdding more Notes to Your Pictures Automatically Saving Files to a Folder Automatically Opening the ImageRetrieving Image Files Selecting the Retrieval Tone Curve USB controller only Deleting Image Files Hard Drive Storage CapacityMenus File MenuEdit Menu Display Menu Camera Menu Capture Mode Clean/ParkDiagnostics Opens the Clean/Park window to expose the CCD for cleaningUser Preferences Automatically Retrieving Images Saving FilesAfter highlighting the desired folder, click Right of the Save scan folder labelAutomatic Scan Viewing in an Application Auto File Open Automatically Save PrescansAuto Naming Auto-rotate Retrieved Files MaskGrid GuidesISO Increment Selection Using SoundsBaseline ISO Setting Pano Settings Use this feature, the factory settings are adequateTime Lapse CropCleaning the CCD Cover Glass Appendix aExposure Adjustments Appendix BManipulating Exposure Line TimeLens Aperture Color Balance SensitivityTone Curves Lighting Line Time Settings Appendix CResolution Selections Appendix DModel 4000E-HS Model 6000-HS, 6000E-HSSuper 6K-HS Super 8K-HS Status Indicators PowerAppendix E StatusHardware Setup Appendix FPanoramic Adapter Scene PanoramaPage Rollout Panorama Object Panorama Hardware is assembled just as it is for a Rollout panoramaError Messages Camera reported error Not ReadyCamera reported error No Room Camera reported error Conversion ErrorCamera reported error Value Error Camera reported error Math ErrorScsi Errors Comm returned error Other Errors Unknown ErrorCamera Timed Out
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