Epson GT-5500 manual Threshold

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threshold

A reference point that is used to determine whether data will be processed as “on” or “off”. If the value of the data is larger than the reference point, the data is considered “on”, and if the value is less than the reference point, the data is considered “off”. In the case of color image data, “on” means that a certain color will appear in a pixel or dot, and “off” means that color will not appear there.

tone correction

A method of adjusting the tone curve so that the reproduction results on different types of output devices have gradations similar to the original image.

tone curve

The graph that shows the contrast ratio between the input (original image) and output (image data) in image processing.

4Glossary

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Contents Page Scanner Parts GT-5500 Declaration of Conformity Contents Appendix a Technical Specifications Glossary Index Page Introduction FeaturesOptions Scsi System Cable 25-pin to 50-pin B860081 Important Safety InstructionsScsi Peripheral Cable 50-pin to 50-pin B860091 Introduction Safety information For United Kingdom UsersSetting Up the Scanner Choosing a Place for the Scanner Removing the Transportation Screw Plugging In the Scanner Initialization Understanding Scsi connections Connecting the Scanner to Your ComputerDaisy Chain Setting the Scsi ID number Scsi CablesPage Do not use an external terminator Connecting the scanner CCautionPower-on sequence Power-off sequence For Windows 95 usersUsing Your Scanner Lights and Buttons Lights Placing a Document on the Scanner Before scanning a documentCorner of the document Removing the Cover for Thick or Large Documents Do not place heavy objects on top of the scannerSizing Up Your System RAM and hard disk sizeMonitors Accelerator boardsVideo cards File compression softwareMaintenance and Troubleshooting Maintenance Cleaning the scannerTransporting the Scanner Replacing the fluorescent lampsProblems and Solutions Error indicatorsReady light does not come on Operating problemsOperate light does not come on Scanner does not start scanningScanner software does not work properly Part of the image is distorted or blurred Quality problemsEntire image is distorted or blurred Edges of the document are not scannedStraight lines in the image are jagged Image is faint or out of focusImage is too dark Image does not look the same as the originalLine of dots is always missing in the scanned image Printed image is larger or smaller than the original size Your image cannot be printed or the printout is garbledTechnical Specifications 2Technical Specifications ScanningElectrical Safety Approvals EnvironmentalScsi Interface Initialization Methods Contacting Customer Support Contacting Customer SupportFor United Kingdom and the Republic of Ireland Users Enquiry DeskCustomer Support For Australian Users Epson FaxbackFor Singapore Users For Hong Kong UsersFor Philippines Users Electronic bulletin board systemGlossary Additive primary colorsESC/I Scsi Threshold Index Index IN-1IN-2 Index Index IN-3 IN-4 Index Epson Overseas Marketing Locations Epson AMERICA, INC