This backend dynamically enabeles the options that are supported by the scanner in dependence of the scanning-mode and other options. Here is an example of the frontend xsane :
| Mode | Remark |
| Lineart | 1 bit/pixel black/white mode |
| Halftone | 1 bit/pixel dithered black/white mode |
| Grayscale | 8 / 10 / 12 / 14 bits/pixel gray mode |
| Color | 24 / 30 / 36 / 42 bits/pixel RGB mode |
| Scan sources |
| Flatbed |
| Transparency adapter (UTA) |
| Automatic document feeder (ADF) |
| Standard options | Remark |
| Analog gamma correction | analog gamma correction doesn't reduce the number of used colors! Value between 1 and 2, only supported by Supervista S12 |
| Highlight | only supported by some scanners |
| Shadow | only supported by some scanners |
| Contrast | only available in halftone-mode |
| Brightness | only available in halftone-mode |
| Threshold | only available in lineart-mode |
| Custom gamma table | digital gamma correction, for color/intensity enhancement! Side-effect: may reduce the number of used colors! |
| Quality calibration | For a quality white calibration. For some scanners the driver has to do this calibration, because I do not know all used calibartion-modes, the driver may hang if you select this option! Take a look at the advanced option Shading type, this defines how the calibration is done if the backend has to do the calibration! |
| Negative scan | Inverts color-intensity, for scanning negatives |
| Bit depth | Image depth in bits/sample the scanner sends to the computer, normally 8 in grayscale and color mode. Some scanners support more than 8bits/sample, but only few file formats support it. If your scanner supports more than 8bis/sample you already get an improvement if you set the bit detpth to 8 because the scanner internal gamma correction is done with the maximum available bit depth!!! |
| Lamp warmup | enable extended lamp-warmup |
| Advanced options | Remark |
| Set exposure time | Enable selection of exposure time, if not enabled, scanner uses default values. |
| Cal. exposure time | Define exposure time for calibration, only supported by some scanners. |
| Scan exposure time | Define exposure time for scan, only supported by some scanners. |
| Set lamp density | Enable selection of lamp density, if not enabled, scanner automatically selects a value. |
| Cal. lamp density | Define lamp density for calibration, only supported by some scanners. |
| Set scan lamp density | Enable selection of lamp density for scan, if not enabled scanner uses the value that was used for calibration. |
| Scan lamp density | Define lamp density for scan, only supported by some scanners. |
| Shading type | Some scanners do the white calibration internally. Other scanners want the backend to calculate the data needed for white calibration, in this case this option defines how the backend calculates the data that is sent back to the scanner. Normally, this option is predefined correctly by the backend. If the white calibration is bad on your scanner, try to change this value. For most scanners it is ok to set this option to "calculate average", but for some scanners (Astra 6X0S, Vista S6E, may be others too), this option must be set to "calculate average and invert". |
Resolutions greater than 600 dpi sometimes make problems