PaperScan Scanner Software is a powerful TWAIN and WIA scanning application with an OCR engine centered on one idea: making document acquisition an unparalleled easy task for anyone.
Features below are bundled in different packages, each specific for one of the three PaperScan Editions: Pro, Home and Free

Image correction/enhancement:

Autodeskew.
Remove punch holes automatically.
Remove borders automatically.
Blank pages detection and removal.
Angle rotation.
Convert to black and white, greyscale or colour.
Adjust colour (brightness, contrast, saturation, gamma).
Apply filters to smooth, stretch contrast or median the image.
Apply bitonal filters to remove isolated dots or to dilate/erode characters.
Bitonal reduction using dithering algorithm (Stucky, Order Dither, Burke, Floyd Steindberg).
Apply contour, sepia or scanline effects.
Erase a specific area.
Storage efficiency:

Automatic color detection.
JBIG2 compression support
Annotations:

Text, Image, Ellipse, Rectangle.
Line, Connected Lines, Freehand Pen.
Ruler, Polygon, Freehand Polygon.
Arrow, Highlighter, Sticky Note, Rubber Stamp.
Other features:

Image printing.
Duplex scanning.
Image quality selection.
Area selection / crop selected area.
Image resizing.
Drag & drop files from Windows Explorer to PaperScan.
Information about resolution, size and colour mode of an image.
PDF encryption. Paperscan can read encrypted PDFs and create PDFs with encryption.
Magnifier tool.