GetSmudges: An Approach to Identifying Irrelevant Noisy Elements on the...

In duncantl/Rtesseract: Interface to the tesseract OCR system

An Approach to Identifying Irrelevant Noisy Elements on the Page

Description

This function attempts to finds rows in the bounding box matrix/data.frame that might be smudges/specs from the scanning process. The approach this takes is to consider if they are sufficiently small in both height and width to be less than a character. This is ad hoc to say the least. One can implement additional or alternative approaches and this is just offered as a utility.

Usage

GetSmudges(bbox, threshold = 5, charWidth = GetCharWidth(bbox),
             charHeight = GetCharHeight(bbox), anywhere = FALSE)

Arguments

bbox	the bounding box matrix/data from for the elements under consideration.
threshold	currently ignored
charWidth	a number for the typical character width on the page
charHeight	a number giving the typical character height on the page
anywhere	if FALSE, we compute the distance between potential specs and see if they are sufficiently far from another element (currently 3 characters away in any direction)

Value

An integer vector giving the indices of any rows in the bounding box matrix/data.frame that are considered specs/smudges by this approach.

Author(s)

Duncan Temple Lang

See Also

GetBoxes

duncantl/Rtesseract documentation built on March 25, 2022, 5:50 a.m.