Hardware Options UMAX / HSD

Every scanner offers some hardware features, which can be accessed via this panel. Of course this panel may be different with different scanners. But this one is which we use for all UMAX / HSD scanners. Depending on the selected color depth some of the features may be disabled.


Threshold
The threshold defines whether a point is scanned as white or black. This option is only enabled in connection with the Line Art mode.
 
Brightness
Brightness indeed acts like a brightness adjustment. This option is only enabled in connection with the Dither mode.
 
Contrast
Adjusts the contrast of scanned grayscale images. This option is only enabled in connection with the Dither mode.
 
High Light & Shadow
Act together like a brightness Filter. This options are only enabled in connection with the Grayscale mode.
 
Invert
Inverts the color channel (even in gray or bw). The result is a negative image.
 
Save Scan
If you get sloping images use this option and scan again. A scan lasts longer when Save Scan is checked. So only use this option if really needed.
 
Gamma
You may choose between four different Gamma Curves and one Default Curve.
 
Transparency Adapter
This option is only available, when a supported transparency adapter was found. Switching between those modes resets the selection rectangle. Be aware that also the rulers and object positions may change.
Normal
Transparency
Turns backlight off.
Turns backlight on.

Note: These features enhance or manipulate image data before they are transferred into the computer system. Therefore there is no way to revert this conversions, than to repeat the scan with different values. This may be faster than a software operation on images.


See also