Hardware Options HP

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 what we use for all HP scanners. Depending on the selected color depth some of the features may be disabled.


Invert
Inverts the color channel (even in gray or bw). The result is a negative image.
 
Mirror
Mirrors the image.
 
Auto Background
The Auto Background option is only available in the 1 bit mode (Line Art). It does some automatic brightness/threshold estimation which excludes any manual brightness adjustment.
 
Brightness
The brightness has different effects depending on the color depth.
LineArt 1 bit :
Here brightness is used as threshold. The threshold defines whether a point is scanned as white or black.
Gray, Color :
In this case brightness indeed acts like a brightness adjustment.
Contrast
Adjusts the contrast of scanned grayscale images. This option is only enabled in connection with the grayscale mode.
 
Smooth Filter
This filter smooths the scanned image by averaging the given amount of pixel (horizontally). Off will switch this feature off, automatic should choose automatically the right amount of pixel.
 
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.
When scanning films or slides the lower light is turned off and a different color correction is chosen. If the switch Calibrate prior to scan is marked the scanner will calibrate its color values right before each scan.
Normal
Transparency
Turns backlight off.
Turns backlight on.

Note: This features enhances or manipulates 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