De-speckle

BoxesHelper searches for boxes the aim being the extraction and recognition of the characters. Also boxes can be used as features in the step of form identification and recognition as anchor elements. BoxesHelper expects as input a monochrome image

ZoneHelper detects and automatically converts inverted text zones and change white-on-black text to normal black-on-white text.

PageHelper detects up side down pages (rotated with 180 degrees) and automatically put the image into the right position for further processing steps (character recognition).

LandscapeHelper detects landscape pages (rotated with 90 degrees) and automatically put the image into the right position for further processing steps (character recognition).

RakeHelper searches for rakes the aim being the extraction and recognition of the characters. Also rakes can be used as features in the step of form identification and recognition as anchor elements. RakeHelper expects as input a monochrome image.

LinesHelper finds and removes horizontal and vertical lines and repairs overlapping text and graphics on binary images.

BordersHelper removes noisy borders in monochromatic images of documents introduced by the digitalization process using automatically fed scanners.

DespeckleHelper provides a successful method for automatically improving the quality of document images and a marked decrease in OCR error rates.