Image processing allows for scanned images to be manipulated either to improve quality of the incoming image, or to gather data from the image itself. Kofax VirtualReScan (VRS) supports a number of image processing filters, some of which are described here.
- Barcode Detection
- The Barcode Detection filter can be used to detect and decode barcodes on scanned images. The filter can detect many different types of barcodes, and there is no limit to the number of barcodes it can detect on a page.
- Border Removal
- The Border Removal filter can be used to remove black edges that sometimes appear around the image during scanning or photo-copying. The Border Removal filter looks for black around the edge of an image (borders) and changes it to white.
- Deshade
- Shaded areas on an image are rectangular areas made up of black speckles. You can remove shaded areas using the deshade feature. The deshade process removes the speckles that make up the shaded areas while preserving the text inside the shaded areas.
- Deskew
- The Deskew filter can be used to straighten images that show a slant from its correct orientation. Skewing can occur if the original document was skewed when it was fed into the scanner, fax machine, or photocopier. The Deskew filter examines the image and determines the skew angle. The skew angle is measured between the actual edge of the image data and the horizontal or vertical axis. The image data is then rotated to correct the skew angle. Deskewing an image makes the image contents more legible and can improve OCR results.
- Despeckle
- Speckles on an image are groups of black pixels surrounded by white pixels (or white pixels surrounded by black pixels). You can remove unwanted speckles with the despeckle feature.
- Edge Enhancement
- The process of cleaning up lines and characters on an image, making them easier to read.
- Endorser - Imprinter
- Used with imprinter hardware that connects to the scanner and is used to print a string of data onto the original scanned document.
- Line Removal
- The Line Removal filter can be used to remove lines from or to reconstruct lines on a form-based image. Removing lines can reduce the image file size and improve OCR results.
- Patchcode Detection
- The Patchcode Detection filter can be used to detect and decode patchcodes on scanned images. The Patchcode Detection filter has no configurable settings.
- Streak Removal
- Sometimes streaks are included on an image during the scan process. For example, they might occur as a result of marks on the original page, dust in the scanner assembly, or faulty scanner. These streaks can be removed with the streak removal feature.