Plustek PS188 - Page 82

MacAction Help44
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Auto Density
Auto Density defines the lightest and darkest pixels in each channel as white
and black and then redistributes the intermediate pixel values proportionately.
Checking this box automatically adjusts the Histogram, to make the scanned
image clearer. It does this by increasing the difference between color tones.
In general, the Auto Density feature gives good results when a simple contrast
adjustment is needed to enhance an image with an average distribution of pixel
values.
This feature is not available when
Black & White
is selected as Scan Mode.
Auto Threshold
Ticking this check box will have MacAction apply optimal threshold value to
your scanned images.
This setting is available only when
Black & White
is selected as Scan Mode.
Auto Crop
Alternatively you may tick this check box to have MacAction automatically
identify the dimensions of the image you scanned and crop around the edges.
The crop shape will be a square or rectangle and it will not trace the edges of
oddly-shaped images. This command can be useful when scanning smaller
images such as photographs.
Auto Deskew
Tick this check box if you want MacAction to automatically straighten the
skewed image
after auto crop is done.
If the placed image is too slanted (>10
degrees), the Auto Deskew function will not
recognize the skewed image(s).
Remove Blank Pages
Tick this check box if you want MacAction to automatically remove blank pages
after the document is scaned.
Image Edge Fill
Tick the check box of
Image Edge Fill
, the edge of scanned image would be
filled.