textord: Remove unused constants

Signed-off-by: Stefan Weil <sw@weilnetz.de>

Author: stweil

textord/colfind.cpp

@@ -44,19 +44,12 @@
 
 namespace tesseract {
 
-// Minimum width (in pixels) to be considered when making columns.
-// TODO(rays) convert to inches, dependent on resolution.
-const int kMinColumnWidth = 100;
 // When assigning columns, the max number of misfit grid rows/ColPartitionSets
 // that can be ignored.
 const int kMaxIncompatibleColumnCount = 2;
-// Min fraction of ColPartition height to be overlapping for margin purposes.
-const double kMarginOverlapFraction = 0.25;
 // Max fraction of mean_column_gap_ for the gap between two partitions within a
 // column to allow them to merge.
 const double kHorizontalGapMergeFraction = 0.5;
-// Min fraction of grid size to not be considered likely noise.
-const double kMinNonNoiseFraction = 0.5;
 // Minimum gutter width as a fraction of gridsize
 const double kMinGutterWidthGrid = 0.5;
 // Max multiple of a partition's median size as a distance threshold for

textord/strokewidth.cpp

@@ -84,8 +84,6 @@ const double kMaxDiacriticDistanceRatio = 1.25;
 // Max x-gap between a diacritic and its base char as a fraction of the height
 // of the base char (allowing other blobs to fill the gap.)
 const double kMaxDiacriticGapToBaseCharHeight = 1.0;
-// Radius of a search for diacritics in grid units.
-const int kSearchRadius = 2;
 // Ratio between longest side of a line and longest side of a character.
 // (neighbor_min > blob_min * kLineTrapShortest &&
 //  neighbor_max < blob_max / kLineTrapLongest)
@@ -104,18 +102,13 @@ const int kLineResiduePadRatio = 3;
 const double kLineResidueSizeRatio = 1.75;
 // Aspect ratio filter for OSD.
 const float kSizeRatioToReject = 2.0;
-// Max number of normal blobs a large blob may overlap before it is rejected
-// and determined to be image
-const int kMaxLargeOverlaps = 3;
 // Expansion factor for search box for good neighbours.
 const double kNeighbourSearchFactor = 2.5;
 // Factor of increase of overlap when adding diacritics to make an image noisy.
 const double kNoiseOverlapGrowthFactor = 4.0;
 // Fraction of the image size to add overlap when adding diacritics for an
 // image to qualify as noisy.
 const double kNoiseOverlapAreaFactor = 1.0 / 512;
-// Ratio of perimeter^2/area for a blob to be considered noise vs i dot.
-const double kShapePerimeterRatio = 3.0;
 
 StrokeWidth::StrokeWidth(int gridsize,
                          const ICOORD& bleft, const ICOORD& tright)

textord/tablefind.cpp

@@ -114,11 +114,6 @@ const int kLargeTableRowCount = 6;
 // Minimum number of rows in a table
 const int kMinRowsInTable = 3;
 
-// The number of "whitespace blobs" that should appear between the
-// ColPartition's bounding box and the column tab stops to the left/right
-// when looking for center justified tab stops.
-const double kRequiredFullJustifiedSpacing = 4.0;
-
 // The amount of padding (multiplied by global_median_xheight_ during use)
 // that is vertically added to the search adjacent leader search during
 // ColPartition marking.

textord/tordmain.cpp

@@ -38,9 +38,6 @@
 
 #include "allheaders.h"
 
-// Gridsize for word grid when reassigning diacritics to words. Not critical.
-const int kWordGridSize = 50;
-
 #undef EXTERN
 #define EXTERN