SANE-oki backend

“Scan source”, “Color mode”, and “Resolution” options of this backend are manipulated from the Xsane main window.

main-window

Scan source

There are three scan methods.

Color mode

Color Mode determines the amount of color information that is preserved from your original document:

Resolution

Resolution determines the amount of detail you will see in a scanned image.

You will be prompted to enter a resolution value between 50 and 1200. The higher the value, the greater the detail of the scanned image. In general, it is recommended you set the resolution as low as possible, as the higher the resolution, the longer the scanning time and the larger the file size.

Furthermore, at low resolution settings (100-200dpi), in True Color or Grayscale mode, more color and detail is often in the image than the majority of printers and monitors can display.

The table below contains recommended resolution settings for different document types.

Document type Resolution
Text (printed) 300
Text (FAX) 200
Text for OCR 300
Black and white or Grayscale image 150
Color photo or Image 150

100 dpi

Suitable for displaying small images on a PC monitor at their original size, e.g. images contained in a presentation or web page. Also suitable for larger images that you will reduce in size to include in a report or presentation.

200 dpi

Suitable for displaying small images which have been increased in size on a PC monitor. Also suitable for printing an image at its original size, on a color or mono printer (up to 720dpi print resolution). Use 200dpi, in black & white scan mode for clear OCR text (larger than 10pt). For smaller text use 300dpi.

300 dpi

When quality is important and a lower resolution is inadequate, choose 300dpi for any size of image and type of use. To determine if the resolution is too low, look for squares in the scanned image. Also use 300dpi in black & white scan mode for optimum OCR results.

Over 300 dpi

Only suitable in specific cases when you require a very high resolution.

Note: The file generated can be very large in size and take up a lot of space on your hard disk.



sane-standard-options-screenshot

Duplex Scanning

Duplex scanning can be selected when the scanning method is set to ADF. You can also set the bookbinding position of the document.

The bookbinding position of the document is in the case of the top of the original is placed leftwards.

When setting the top of the original is placed upwards (align the top of the original to the inner side of scanner), the bookbinding position of the document becomes reverse.

When the top of the original places upwards, please set “Rotate preview and scan” of the preview window of Xsane as “270”.

Sharpness

RGB channel is supported.

Selecting a different item (None, Sharpen, Sharpen More) will change the image accordingly.

Background Elimination

Remove the mixed color of the scanned image on which the corresponding parts shall be white .

Edge Erase

Mask edge areas of the document.

(Erases shaded areas in the document.)

Font Smoothing

Make text appear clearer.

If checkbox is enabled, text will appear smoother.

Moire Elimination

Remove the rippled (moiré) pattern that can appear in subtly shaded image areas, such as in skin tones. Also improves results when scanning magazine or newspaper images that include screening in their original print processes.