User manual AVISION AV100III

[. . . ] AV100III Color Image Scanner User's Manual Version 1. 1 (Doc. 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. [. . . ] Or you should 4-1 do this whenever the scanned image seems to be too dark. Place the image to be scanned face down on the scanner. Avision Sheet-fed TWAIN user interface will pop up on the screen. Click on the Prescan or Scan button to get the image. The TWAIN user interface: 4-2 4. 1 Image Type You can select the Type menu for the mode you want to use with your document or image. Line art Line art includes only black and white areas. There are no intermediate shades of gray in between. Halftone Halftone simulates different shades of gray by varying the threshold value of a matrix. Error Diffusion While taking up but a minimum storage space, error diffusion gives good image texture and excellent image details. Gray (256 levels gray scale) Scanner recognizes each point in the image as a shade of gray (continuous tone). 8-bit gray gives more detailed information about the image. True Color (16. 7 million colors) Color image have continuous tones along with its color hues. 4-3 Note: For best OCR and article print-out effect, we recommend the scanning parameters to be that of 300 dpi, black and white mode. To scan pictures or photos, the color or gray scale mode is necessary But then, these modes invariably take up much more disk space. An A4-size color image scanned at 300 dpi, for instance, takes up as much as 24MB of disk storage space. To save disk space, then, we suggest you set the scanning resolution at 100 dpi for those images intended for screen display use only, now that a scanning resolution of 100 dpi can do quite all right for the said purpose. 4. 2 Resolution Control Resolution: The number of dpi (dots per inch) that AV100III uses for a scan. 4-4 4. 3 Image Control 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 range. Adjusts the midtone of the image without losing details of the lightest and the darkest areas. Adjusts the highlight area of the image. Used along with the five functions above, this function enables you to select RGB for Red, Green, or Blue filter to display the color image the way you desire. Gamma: Highlight: Shadow: Channel: Brightness Shadow Gamma Highlight Shadow Color Filter: You can select None, Red, Green or Blue filter for color drop out purpose when in line art / halftone / error diffusion / gray mode. For instance, a text with a red background color hampers the reading. In this case, then, you can select RGB for the Red filter to drop out the background color and facilitate the reading. 4-5 Invert: The invert command reverses the brightness and the color in the image. [. . . ] Else, without power, the scanner can not transfer the printing data/signals to the printer. Question: Why doesn't my GDI printer work with AV100III scanner?Answer: Disable the "Auto Scan" function in the application, and your printer will function all right. Question: Why some parallel port devices and software's keypro do not work with AV100III scanner? [. . . ]