Patagames.Ocr.InputFilters Namespace

Represents the image filter that turns every pixel black or white with no middle ground. May Improve OCR performance cases of very low contrast of text to background.

Represents contrast enhancement filter.

Represents adaptive contrast normalization filter.This filter often improves OCR speed and accuracy in low contrast scans.

Represents filter that shrink a source image by the specified amount.

Create filter that rotates an image so it is the right way up and orthogonal. This is very useful for OCR because Tesseract tolerance for skewed scans can be as low as 5 degrees.

Represents filter that adds pixels to the boundaries of objects in an image. Opposite of OcrErode.

Represents a filter which will automatically detect low-resolution images (which are under 300 dpi) and automatically upscale the image and then sharpen all of the text so it can be read perfectly by an OCR library.

Represents filter that removes pixels to the boundaries of objects in an image. Opposite of OcrDilate.

Represents the collection of input filters

Represents filter that expand a source image by the specified amount.

The base class for input filters.

Represents the filter that inverts every color. E.g. White becomes black : black becomes white.

Represents filter that attempts to remove pixel noise and junk at the edge of the image before cropping.

Represents a high-level, simple interface for rotating images about their center.

Represents input filter that turns every pixel into a shade of grayscale.

Represents filter that cleans background to white using background normalization.