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### TWAIN Driver Settings (Windows®)

- Note that the item names and assignable values will vary depending on the machine.
- The Brightness option is available only when selecting the Black & White, Gray (Error Diffusion), True Gray, or 24bit Color option from the Scan Type settings.
- The Contrast option is available only when selecting the Gray (Error Diffusion), True Gray, or 24bit Color option from the Scan Type settings.

1. Scan
     Select the Photo, Web, or Text option depending on the type of document you want to scan.

     Scan (Image Type) | Resolution | Scan Type
     --- | --- | ---
     Photo | Use for scanning photo images. | 300 x 300 dpi | 24bit Colour
     Web | Use for attaching the scanned image to web pages. | 100 x 100 dpi | 24bit Colour
     Text | Use for scanning text documents. | 200 x 200 dpi | Monochrome

2. Resolution
     Select a scanning resolution from the Resolution drop-down list. Higher resolutions take more memory and transfer time, but produce a finer scanned image.
3. Scan Type
     Select from a range of scan colour depths.
     - Black & White
         Use for text or line art images.
     - Gray (Error Diffusion)
         Use for photographic images or graphics. (Error Diffusion is a method for creating simulated grey images without using true grey dots. Black dots are put in a specific pattern to give a grey appearance.)
     - True Gray
         Use for photographic images or graphics. This mode is more accurate because it uses up to 256 shades of grey.
     - 256 Color
         Use for simple colour illustrations that do not need the full colour spectrum. This mode uses up to 256 colours to create images.
     - 24bit Color
         Use to create an image with the most accurate colour reproduction. This mode uses up to 16.8 million colours to scan the image, but it requires the most memory and has the longest transfer time.
4. Reduce Noise
     Improve and enhance the quality of your scanned images with this selection. The Reduce Noise option is available when selecting the 24bit Color option and the 300 x 300 dpi, 400 x 400 dpi, or 600 x 600 dpi scan resolution.
5. Brightness
     Set the Brightness level by dragging the slider to the right or left to lighten or darken the image. If the scanned image is too light, set a lower brightness level and scan the document again. If the image is too dark, set a higher brightness level and scan the document again.
6. Contrast
     Increase or decrease the Contrast level by moving the slider to the right or left. An increase emphasizes dark and light areas of the image, while a decrease reveals more details in grey areas. You can also type a value in the field to set the contrast level.
7. Document Size
     Select the exact size of your document from a selection of preset scan sizes.

     If you select Custom, the Custom Document Size dialog box appears and you can specify the document size.

Related Information
  - Scan Using TWAIN-Compliant Applications (Windows®)

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