User manual AVISION AV8050U

[. . . ] A3 High-Speed Document Scanner User's Manual Regulatory model: DT-0603H Avision Inc. Trademarks Microsoft is a U. S. registered trademark of Microsoft Corporation. Windows and MS-DOS are trademarks of Microsoft Corporation. IBM, PC, AT, XT are registered trademarks of International Business Machines Corp. [. . . ] If you have a simplex or a sheetfed scanner, the duplex or the flatbed option will not be available. 35 4. 3 THE COMPRESSION TAB The Compression tab allows you to compress your scanned image and choose the level of compression. Bi-tonal images are normally compressed using CCITT standard called Group 4 (G4). Color and grayscale images are often compressed using JPEG technology. Move the JPEG Quality slider to the right or left to increase or decrease the level of compression. Note the greater the compression level, the lower image quality. Note that the compression depends on your image editing application. If your image editing application does not support the type of compression format, then either a warning message will appear or the image quality of the compressed file will not be acceptable. This group developed and lent their name to a file compression standard for color and grayscale images that is widely used by scanners, and software applications. On Microsoft Windows-based systems, a file with the extension . jpg has normally been compressed using this standard. For scanning color or gray images, the following compressions are available: None JPEG For scanning B&W images, the following compressions are available: None G4 36 The Compression tab dialog box 37 4. 4 THE COLOR DROPOUT TAB 4. 4. 1 COLOR DROPOUT SELECTION Color Dropout tab allows you to drop either of the red, blue, or green color in your scanned image. If your image contains red color watermark or background, choose the R (Red) channel then any red watermark or background will be removed. This feature is used to sharpen your text when using OCR (Optical Character Recognition) software. Note that this function supports only black & white and gray images. Therefore, be sure to choose any black & white or gray image type while applying this function. The Color Dropout dialog box 38 4. 4. 2 OTHER COLOR DROPOUT OPTIONS Advanced Processing provides two options that can adjust your scanned image in the best optimal result. Filter Threshold This value is used to determine the color which will be dropped out. A lower value will drop more of the selected color out, while a higher value will leave more of the selected color in. The pixel which is higher than the background value will be adjusted to the lightest point. Adjust the value for both the Filter Threshold and Background Level to produce the best optimal result. Backgroun d Level Example, slightly adjusting the background value makes your text more clear. Original 39 Remove Blue, Threshold: 20, Background: 255 Remove Blue, Threshold: 20, Background Level: 210 40 4. 5 THE PAPER TAB The Paper tab allows you to define values relating to image output (i. e. , Auto Crop or not, Scan Area, OverScan, Multi-Feed Detection). The Paper tab dialog box 41 4. 5. 1 CROPPING Cropping allows you to capture a portion of the document being scanned. Choice: Automatic, Fixed to Transport, EOP (End of Page) Detection. Options Automatic Description Automatic adjusts the cropping window according to different document sizes. Use this option for batches of mixed-sized documents. This feature allows you to define the area or zone to be imaged. [. . . ] Document glass Figure 7-1 The cleaning area 76 8. TROUBLESHOOTING If you have problems with the operation of your scanner, please check the following troubleshooting hints. 8. 1 FREQUENTLY ASKED QUESTIONS Question: When the scanner is powered on, it makes noises and won't stand ready. Answer: There are two possibilities: 1) You might fail to push the scanner shipping lock to its "use" position. If this is the case, pull the scanner status switch to its "use" position first. [. . . ]