Ricoh IS450 operating instructions Resolution

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6. Appendices

Resolution

This function permits setting separate resolutions for the main-scanning and the sub-scanning, over a range of 100dpi to 800dpi (in 1dpi increments) for each. A high resolution setting requires more free space in memory and requires more processing time.

Basically, when outputting a scanned image that is the same size as the original image, set the same resolution as that of the output device. Image quality will suffer if the resolution is less than that of the output device, and it is meaningless to set a resolution that is higher than the resolution that the output device is capable of. However, if the output image is to be enlarged or reduced compared to the original, change the resolution by the same ratio.

Original

Low resolution

High resolution

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Contents Image Scanner Introduction Copyright Declaration of Conformity Safety Information Safety During OperationExamples of Indications Safety Information Iii Important Information Important InformationImportant Information Limitation How to Read This ManualHow to Read This Manual ReferenceTable of Contents Setting Originals OriginalsGeneral Scanning Method Manual Scanning DIP Switches Functions MaintenanceSpecifications OptionsPage Features IntroductionSpace-saving design IntroductionGuide to the Scanner Scsi Connector Power ConnectorRotary Switch DIP SwitchesUnderstanding the Indicators DescriptionIntroduction Preparing for Installation Setup locationChecking the Scanner Location Setting up the Scanner Installation space Installation environment ImportantUsable range Recommended range Setting up the Scanner Connecting to the Host ComputerWhat is SCSI? Scsi Connection Require Ments for the ScannerSetting the Scsi ID Connecting the Scsi Cable No Connection to Other PortConnecting to the Host Computer 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 On/Off the Scanner Power Turning On the Scanner PowerTurning Off the Scanner Power Initializing the Scanner Recommended Sizes and Weights of Originals OriginalsDifficult to Detect Sizes Original Sizes and Scanning Area Originals Original sizes that can be detected automaticallyContact glass Auto Document Feeder ADF 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 ActionError Indicators and Solutions TroubleshootingDescription of error Action 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 DistanceOptions Image Processing Unit Type aRed Lamp Unit Type a Endorser Unit Type a Printing Function Specifications Scanner Electrical and Hardware SpecificationsDIP Switches Functions PreviewBinary scanning ScanScanning Composition Halftone scanningStandard mode Dynamic threshold modeBinary Scanning/Threshold Halftone Scanning Gray Scale Scanning Area Extraction Section Area Multi-area Settings Auto Photo/Letter Resolution Brightness ContrastGamma Correction Noise removal Binary FiltersParameter Download SmoothingDocument Size Detection Document Size Detection on the Contact GlassDocument Size Detection in the Auto Document Feeder ADF When Erase Background is disabled When Erase Background is enabledErase Background DIP Switch 10, 27 IndexRed Lamp Unit Appendices