Visioneer 8820 manual About Jpeg Compression

Page 36

32VISIONEER ONETOUCH 8820 SCANNER INSTALLATION GUIDE

8.Click OK on the Conﬁguration dialog box.

The new conﬁguration and its adjusted settings now apply to the button whose tab is selected at the top of the Conﬁguration dialog box.

Note: If you select the Copy/Print or Fax button, the dialog box for editing and adjusting the settings will have a Device tab for selecting options for a printer or copier. See the Help for more information.

ABOUT JPEG COMPRESSION

Scanned graphics, photos, and other images can sometimes produce large ﬁles. The JPEG options for scanning reduce the ﬁle size by compressing the image electronically. But compression also reduces image quality. Therefore, compressing an image involves a trade-off between image quality and ﬁle size. In many cases, loss of quality due to compression is not readily apparent, but the amount of compression you select—if any—depends on the quality you want.

The JPEG compression options only apply to:

■Destination applications used for graphics, photos, and artwork images. Word processing applications, fax applications, and other text-based destination applications do not use JPEG compression.

■Scan modes for color or grayscale scanning. JPEG compression does not apply to the Black/White scan mode.

Note: You can add JPEG compression to the existing preset conﬁgurations if the destination application is for graphics, photos, or other artwork images.

Image 36

Contents Visioneer OneTouch Scanner P Y R I G H T I N F O R M a T I O N B L E O F C O N T E N T S Visioneer OneTouch 8820 Scanner Specifications Welcome WHAT’S in the BOXVisioneer Onetouch 8820 Scanner Visioneer ONE Touch 8820 Scanner What YOU Need Getting the Paperport Software USER’S GuideInstalling To install the PaperPort softwareVisioneer Onetouch 8820 Scanner Installation Guide Connecting the Scanner To connect the OneTouch 8820 scanner to a USB portVisioneer Onetouch 8820 Scanner Installation Guide Power cord Checking OUT Your Scanner To check the status of the scannerIf the Scanner is not Properly Connected To connect the scanner Three Ways to Scan Paper Items Scan with the Scanner ButtonsScan from the Screen Scan from the PaperPort Software or Other Twain SoftwareScanning Paper Items with the Onetouch Buttons To scan by pressing a button on the scannerScanning from the Button Panel on the Screen To scan from the screenButton Preconﬁgured Settings About the Onetouch ButtonsScanning Transparencies Brief ExplanationTo position a transparency for scanning Mask for 5 by Mask for 35mm film Scanning Transparencies To scan the transparency Scanning Transparencies Configuring the Scanner About the Configuration Dialog BOX To display the Conﬁguration dialog box from the Button PanelClick this Getting Help Selecting NEW Options for the Buttons To select new options for a scanner buttonCreating NEW Configurations Adjusting Scan Settings and page SettingsTo adjust the scan settings and page settings Visioneer Onetouch 8820 Scanner Installation Guide Configuring the Scanner Visioneer Onetouch 8820 Scanner Installation Guide Configuring the Scanner About Jpeg Compression Setting Preferences To set preferencesVisioneer Onetouch 8820 Scanner Installation Guide Configuring the Scanner To set up the PaperPort software with the scanner Scanning from the Paperport SoftwareScanning AN Item with the Twain Button To scan an itemClick AutoScan to scan with your preset scan choices To scan manually To scan automatically Click AutoScan Getting Help with the Paperport Software Adjusting the Settings on the Scan Manager PRO To adjust a settingSaving a NEW Profile To save a new proﬁleVisioneer Onetouch 8820 Scanner Installation Guide Adjusting the Resolution and Sharpness To adjust the resolution and sharpness To use the advanced optionsAdjusting the Brightness and Contrast To adjust the brightness and contrastTo use the Sampler buttons Adjusting GAMMA, SATURATION, and Color HUE To adjust the color settings Adjusting Output Size To Auto Trim an item Click Auto Trim To manually set the output size for an itemAdjusting the Settings on the Scan Manager PRO Area you selected to scan To save a custom size setting Saving a Custom SizeScan Info BOX Zooming in and OUTTo enlarge and reduce the preview image To set the Scan Manager Pro preferences Getting Help with the Scan Manager PRO Cleaning the Scanner Glass To see the Scan Manager Pro help informationScanning resolution Scanner dimensionsWeight Operating temperatureD E Page Index