User manual AVISION AV626C

[. . . ] Color Image Scanner AV626C User's Manual (D/N 250-0152-E Rev. A) Avision Inc. Trademarks Microsoft is a U. S. registered trademark of Microsoft Corporation. Windows and MS-DOS are trademarks of Microsoft Corporation. [. . . ] Click O. K. 3-1 In Windows 95 or Windows NT 3. Press the Start button, choose RUN, type d:\driver\AV626C. exe (d: the CD-ROM drive in use), and then click O. K. Follow the on-screen instructions to complete the installation. Fig. 3. 2 3-2 3. 2 UNINSTALL THE SCANNER You can uninstall the scanner by selecting Start>Programs>Avision AV626C and double clicking on the Uninstall command from the scanner . 3-3 4. SCANNER OPERATION & DOCUMENT PRINTING Scanning Images from within an Application (TWAIN) 1. Open your application and choose Select Source from the File menu. If the Select Source menu options are not available from the File menu, see the user guide of your application to learn how the TWAIN link is used. A dialog box appears containing the different TWAIN sources that you can choose from to bring an image into your application. When you have used the dialog box to select a different source, you will need to select AV626C as the source again before you can reuse the Button scanner. Place the image to be scanned face down on the glass. The TWAIN user interface will pop up on the screen. Click on the Preview or Scan button to get the image. 2. 3. 7. 4-1 The TWAIN user interface: 4-2 4. 1 IMAGE TYPE The Button scanner provides five image types as explain in below: Line art Error Diffusion Scanning Source Halftone Gray Color Scanning Source Two scanning sources are provided- flatbed as well as transparency. Line art Line art presents the image in black and white only and there are no intermediate shades of gray in between. Halftone In addition to the black and white display, Halftone can present a somehow gray shade of image by using different size of dots. Error Diffusion While taking up but a minimum storage space, error diffusion gives good image texture and excellent image details. 4-3 Gray (256 levels gray scale) Gray presents a 256 shades of gray in an image. Color (Internal one billion colors) The 36 bits True Color presents 16. 7 million color(output) and give much more tonal range and details in a color image. 4-4 4. 2 SCANNING PARAMETERS & IMAGE CONTROL Resolution Brightness Contrast Resolution: The number of dpi (dots per inch) that the scanner uses for a scan. Usually the greater the number, the higher the resolution. Yet up to a certain level, the resolution will not be visually increased but the disk space will be increased. Brightness: Adjusts the lightness or darkness of an image. The higher the value, the brighter the image. Contrast: Adjusts the range between the darkest and the lightest shades in the image. The higher the contrast, the bigger the different gray scales. 4-5 Auto Level Auto Area Color Descreen Matching Reset Invert Calibration Quality Mode Speed Mode Pixel/Inch/Cm Set Gamma Image Information Auto Level: Optimizes the scanned image. [. . . ] Question: The scanning speed of my scanner is much slower than that of those installed at other computers. Answer: Set you PC printer port to the EPP mode from BIOS setting. Question: Why does my scanner scan at a very low speed?Answer: If you have installed Works for Windows, it will install Window Printing System (WPS) in your WIN. INI file. [. . . ]