User manual AVISION AV3600

[. . . ] AV3800 / 3600 ADF/Flatbed Desktop Color Scanner User's Manual (D/N: 250-0405-E Rev. 1. 0 ) FCC Radio Frequency Interference Statement This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communication. However, there is no guarantee that interference will not occur in a particular installation. [. . . ] LineArt is the best choice of image type if you want to scan text, pen or ink drawing. Since only 1-bit of black or white information is required for each pixel*, the disk space required for saving lineArt image is only about 1/24 of that required to save 24-bit true color images. 4-4 Lineart Image *Pixel: A combination of two words: picture and element, a pixel is a single dot on a computer display or in a digital image. 4-5 Halftone In addition to the black and white display, Halftone simulates gray scale by using different size of dots. Particularly when you view the image at a certain distance, it looks very closely like a gray image yet it consumes the least disk space. Halftone is the picture that we usually see in newspapers or magazines. Since Halftone is one type of black and white image, the disk space required to save a halftone image is 1/24 of that required to save a 24-bit true color image. Halftone Image 4-6 8-Bit Gray A single-channel image consists of at least 256 shades of gray. An 8-bit scanner produces a grayscale image with 1024 shades of gray between pure black and pure white. With 8 bits of color information per pixel, the file size of an image is eight times larger than a Black and White image and 1/3 the size of a 24-Bit Color image. Gray Image 4-7 8-Bit Color an 8-Bit Color image provides 256 color hues in the image. The file size of a 256 color image is 1/3 the size of a 24-Bit Color image. 8-Bit 24-Bit Color Color Image A 24-Bit Color image consists of three 8-bit color channels. The red, green, and blue channels are mixed together to create a combination of one billion colors which give a more true-to-life quality to the image. Choose 24-Bit Color if you are scanning color photos. 24-Bit Color Image 4-8 4. 4 ENHANCING YOUR IMAGE Brightness: Adjusts the lightness or darkness of an image. The higher the value, the brighter the image. Increase your Brightness 4-9 4. 5 CONTRAST Adjusts the range between the darkest and the lightest shades in the image. The higher the contrast, the bigger the different gray scales. Increase your Contrast 4-10 4. 6 INVERT IMAGE The invert command reverses the brightness and the color in the image. For color images, each pixel will be changed into its complementary color at the command of Invert. Original After Invert 4-11 4. 7 MIRROR Click on the Mirror button to reverse the image (create a mirror image). Mirror function is off Mirror function is on 4-12 4. 8 PREVIEW AUTO-AREA: Clicking on the Preview Auto-Area button automatically crops the preview scan area to the previewed document. This will then be the cropping area for all of the scanned documents. 4. 9 PAPER SIZE: Select a size on the Paper Size list of frequently used scan sizes, including business card, 5 x 3 in. , 6 x 4 in. , Letter, Legal, B5, A5, A4, A3, or your current scan area to perform an immediate selection of your scan size. 4. 10 UNITS The Units button indicates the measuring system that is in use(Inch, Cm, or Pixel). 4. 11 DESCREEN Click on the Descreen button to access a drop-down menu that allows you to specify the type of document you are scanning in order to eliminate the moiré pattern* commonly found in printed matter. You can specify Newspaper, Magazine, or Catalog. 4-13 Before Descreen After Descreen *Moiré pattern-- an undesirable pattern resulting from the incorrect screen angle of the overprinting halftone. 4. 12 SHARPEN Click on the Sharpen button to access a dropdown menu that allows you to specify a level to sharpen the scanned image. You can specify a Sharpen setting of Light, More, Heavy, or Extra Heavy. 4. 13 COLOR ADJUSTMENT Click on the Color Adjustment button to enable the button for the Hue, Saturation, and Lightness feature. NOTE: The Advanced Settings button must be enabled in order to use the Hue Saturation, and Lightness feature. 4-14 4. 14 AUTO LEVEL Click on the Auto Level button to add shadow to reveal more details in an image. 4. 15 ADVANCED SETTINGS Click on the Advanced Settings button to view the advanced settings buttons for Highlight / Shadow, Curves, Color Balance, Hue / Saturation / Lightness, Color Drop-out, and Custom Settings (six buttons on the right side of the TWAIN dialog box). Highlight / Shadow This feature is available when 8-Bit Gray, 8-Bit Color, or 24-Bit Color is selected on the Image Type drop-down menu. Highlight refers the lightest point in a scanned image; shadow refers the darkest point. Click on the Highlight / Shadow button to access the Highlight / Shadow Levels dialog box. You can type values in the text boxes or you can place the mouse cursor over the line, click the right mouse button, and drag the line to specify the values you want. 4-15 Use the Highlight and Shadow settings together to extend the range of color and reveal more details in a color image. 4-16 Curves When you select the Curves button, a dialog box appears that allows you to adjust the midtone of the image without losing details in the lightest and darkest areas. Select the Curve or Line button, depending on if you want a curved or an angled setting. Place the mouse cursor over the line, click the right mouse button, and drag the line to set the curve you want. Color Balance When you select the Color Balance button, a dialog box appears that allows you to adjust the color of the image so that it comes close to that of the original. 4-17 The default parameters are used to adjust the image. [. . . ] Hold the upper part of the pad clamp and place it gently to the pad holder as shown in Figure 6-4. Upper Part of the Pad Clamp Figure 6-4 Installing the pad module 6-5 7. TROUBLE SHOOTING The scanner will automatically perform a simple self-test each time it is turned on. When the test is completed, if no error occurs, the READY LED is steadily on. If you have problems with the operation of your scanner, please check the following troubleshooting hints. 7. 1 QUESTION AND ANSWER Question: The LED indicates that the scanner is ready, but the scanner does not respond to the scan command from the host computer. [. . . ]