Ricoh IS450 operating instructions Gamma Correction

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6. Appendices

Gamma Correction

The following types of gamma correction are possible. However, different models of output devices have different characteristics. Select a suitable gamma curve for the original that is to be scanned and the output device.

Normal

Emphasizes the contrast slightly, resulting in a somewhat sharp scanned image.

Sharp

Emphasizes the contrast, resulting in a sharp scanned image.

Soft

Decreases the contrast, resulting in a soft scanned image.

Linear

Outputs the image as scanned.

User-defined

Downloads a user-defined gamma curve for gamma correction.

Normal

Sharp

54 Soft

Linear

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Contents Image Scanner Introduction Copyright Declaration of Conformity Examples of Indications Safety InformationSafety During Operation Safety Information Iii Important Information Important InformationImportant Information How to Read This Manual How to Read This ManualLimitation ReferenceTable of Contents General Scanning Method Manual Scanning Setting OriginalsOriginals Maintenance SpecificationsDIP Switches Functions OptionsPage Features IntroductionSpace-saving design IntroductionGuide to the Scanner Power Connector Rotary SwitchScsi Connector DIP SwitchesUnderstanding the Indicators DescriptionIntroduction Checking the Scanner Location Preparing for InstallationSetup location Setting up the Scanner Installation space Installation environment ImportantUsable range Recommended range Connecting to the Host Computer What is SCSI?Setting up the Scanner Scsi Connection Require Ments for the ScannerConnecting to the Host Computer Setting the Scsi IDConnecting the Scsi Cable No Connection to Other Port Connecting the Scsi Cable Connection to Other Port Connecting the Power Cable Plug the other end of the power cable into the power outlet Turning Off the Scanner Power Turning On/Off the Scanner PowerTurning On the Scanner Power Initializing the Scanner Recommended Sizes and Weights of Originals OriginalsDifficult to Detect Sizes Contact glass Auto Document Feeder ADF Original Sizes and Scanning AreaOriginals Original sizes that can be detected automatically Setting Originals Setting the Original on the Contact GlassSetting the Original in the Auto Document Feeder ADF Align the originals on the ADFSimplex scanning Duplex scanning Guides Make sure the Auto Document Feeder ADF is closed Setting Originals Scanning Originals General Scanning MethodManual Scanning Scanning OriginalsWhen Scanning Does not Start Item to check ActionDescription of error Action Error Indicators and SolutionsTroubleshooting Procedures to Correct Errors in the ADF When an Original is Jammed in the Auto Document Feeder ADFReplacing the Ink Ribbon Do not pull on the Endorser’s cord Cleaning the Endorser Maintenance Cleaning the ScannerCleaning the Feed Roller and Drum AppendicesMaintenance Cleaning the White Roller Duplex Model Only Maintenance Moving the Scanner Disposing of the Scanner Carrying the Scanner a Short DistanceRed Lamp Unit Type a OptionsImage Processing Unit Type a Endorser Unit Type a Printing Function Specifications Scanner Electrical and Hardware SpecificationsDIP Switches Functions PreviewScan Scanning CompositionBinary scanning Halftone scanningBinary Scanning/Threshold Standard modeDynamic threshold mode Halftone Scanning Gray Scale Scanning Area Extraction Section Area Multi-area Settings Auto Photo/Letter Resolution Brightness ContrastGamma Correction Binary Filters Parameter DownloadNoise removal SmoothingDocument Size Detection in the Auto Document Feeder ADF Document Size DetectionDocument Size Detection on the Contact Glass Erase Background When Erase Background is disabledWhen Erase Background is enabled DIP Switch 10, 27 IndexRed Lamp Unit Appendices