Advanced Properties - Color

In some cases, you may want to remove all instances of one color to make the necessary data more accessible to OCR engines. To effectively "erase" unwanted color content such as stamped red lettering, you can use color dropout during scanning. If you select a color to "drop out," your scanner will ignore that color but capture everything else.

The Front Side Dropout Color and Back Side Dropout Color groups provide the following dropout color choices: None, Red, Green, Blue, Orange, or Orange and Red (the latter is treated as a single color combination). The default is None. When duplex scanning is selected, you can specify different dropout colors for the front and back sides.

JPEG (Joint Photographic Expert Group) is a standardized image format designed to compress color and grayscale images. In the JPEG Compression group, you can select the Enabled check box to activate JPEG compression. When the Enabled check box is selected, you may select an image quality level of Good, Better, Best, or Custom. Lower quality level values conserve more disk space by reducing the size of scanned images and can result in improved system performance.

When the Custom image quality level option is selected, both a YUV value and a custom quality value may be set. The custom quality value has a range of 1 to 100, with a default of 65.

You may type a custom quality value into the text box provided, or use the up and down arrows to select a value. The JPEG Compression quality adjusts the tradeoff between image quality and file size. Higher values result in better image quality and larger file sizes; lower values generate smaller files but with reduced image quality. Use the lowest setting that produces acceptable image quality results for your application. The preset "Good" JPEG quality value produces good image quality with moderate file sizes. "Better" and "Best" settings generate increasingly better quality images at the cost of larger file sizes.

YUV, a color-encoding scheme involving luminance (frame and field brightness or "Y") and chrominance (color information or "UV"), may be selected from the list if desired. The choices for YUV may vary by scanner.