AdvancedOcr Fields

The AdvancedOcr type exposes the following members.

Public fieldAcceptedOcrCharacters
Specifies the characters the OCR engine will look for, which can hugely improve speed and accuracy. The default behavior is to identify all UTF-8 characters including accented characters borrowed from international languages.

E.g. "0123456789" or only numbers, or "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.:;?!@$%&+-,-()\"'0123456789" for English characters without accents.

Public fieldCleanBackgroundNoise
AdvancedOcr will clean background 'noise' , dust, speckles and signs of paper away from printed text. Works even scrupled, stained or damaged paper.

RotateAndStraighten is a powerful tool, making imperfect scans OCR accurately. CPU/GPU intensive.

Public fieldColorDepth
Bits of color per channel per pixel. Lower ColorDepth can reduce scanning time for documents that also contain many colors or images. A value of ZERO will result in image color depths not being modified from the original source image.
Public fieldColorSpace
OCR documents can be scanned in GreyScale to reduce processing time. This may not work well for low-contrast text on a non-white backgrounds.
Public fieldDetectWhiteTextOnDarkBackgrounds
Automatically detects and adjusts white text on darker backgrounds such as found in microfilm, negatives and some styles of graphic design.
Public fieldEnhanceContrast
Enhances image contrast adaptively, which generally increases text readability both by humans ans machines.
Public fieldEnhanceResolution
Re-renders low quality images at a higher DPI.

IronOcr works faster and more accurately with high resolution images. Useful for images scanned at under 250 DPI

Public fieldInputImageType
Hints the OCR Engine about the type of image being scanned, which can reduce OCR time and increase accuracy.
Public fieldLanguage
Natural Language of the scanned documents. Default is English.
Public fieldReadBarCodes
Enables Barcodes to be extracted from OCR documents, alongside the text content.
Public fieldRotateAndStraighten
AdvancedOcr will deskew and rotate images to be straight, upright, unbent and without perspective.

RotateAndStraighten is a powerful tool, making imperfect scans OCR accurately. CPU/GPU intensive.

Public fieldStrategy
Algorithm to be used for OCR text analysis.
See Also
Download DLL or Install with Nuget