Ricoh IS430 user manual ¡ Resolution

Page 39

Image Scanner User's Manual

￿¡ Resolution

Function: To set vertical and horizontal resolution independently at 60, 75, and 100 to 800 dots per inch.

The higher the resolution, the finer the detail. However, a high resolution image requires much more memory space and processing time than a low resolution im- age.

Note: If the resolution is set at more than 400 dpi, the maximum scanning width is less than

304 mm.

Usage: Generally, setting the scanning resolution at the resolution of your output device results in high quality imaging. A lower resolution means lower quality and a higher resolution is a waste of memory. However, if you change the scale of your image, modify the resolution according to the scale.

Original

Appendix

Lower

Higher

- 31 -

03_IS430-BODY

Page 31

97.5.8, 5:37 PM

PageMaker 5.0J

Image 39
Contents IS430 G406-8610 Important information Remarque concernant les utilisateurs au CanadaPage Precautions Area Rating Plug Cable Connector Contents Options Functions97.5.8, 535 PM ¡ Front view Part namesPart names ¡ Rear viewName Qty InstallationParts list ¡ Checking the partsOperating environment ¡ Location¡ Connecting the Scsi cable ¡ Connecting the power cord ¡ Setting the Scsi ID¡ Initializing the scanner ¡ Turning the power onScanner Document feeder Meaning Green Amber IndicatorsPlacing originals Original condition ¡ Placing an original on the contact glass¡ Placing originals on the document table Nals, otherwise the inner mylar might Be damaged Soft cloth CleaningCleaning Troubleshooting ¡ Lamp cover openCorrective action ¡ Document feeder cover open ¡ Lamp errorIf you cant see the document, see steps 4 to ¡ Paper jam¡ Paper misfeed ¡ Document table error¡ System error Problem Cause Corrective action Refer¡ Others Specifications Functions Appendix¡ Scan ¡ Prescan¡ Scanning composition ¡ Binary scanning / Threshold Manual thresholdDynamic threshold ¡ Halftone scanning ¡ Multi-value scanning ¡ Area extraction Case of scanning without this function ¡ Section area Multi area settings¡ Auto photo/letter ¡ Resolution ¡ Contrast ¡ Brightness¡ Gamma correction ¡ Binary filter ¡ Document size detection ¡ Semi-automatic document feed Sadf modeBook mode Document feeder mode ¡ Parameter download¡ Red lamp unit OptionsAuto photo/letter ¡ Data compression unit¡ Video interface unit ¡ Image processing unit