#include <alignedblob.h>

Inheritance diagram for tesseract::AlignedBlob:

Public Member Functions
	AlignedBlob (int gridsize, const ICOORD &bleft, const ICOORD &tright)

	~AlignedBlob () override

ScrollView *	DisplayTabs (const char window_name, ScrollView tab_win)

TabVector *	FindVerticalAlignment (AlignedBlobParams align_params, BLOBNBOX bbox, int vertical_x, int *vertical_y)

Public Member Functions inherited from tesseract::BlobGrid
	BlobGrid (int gridsize, const ICOORD &bleft, const ICOORD &tright)

	~BlobGrid () override

void	InsertBlobList (BLOBNBOX_LIST *blobs)

Public Member Functions inherited from tesseract::BBGrid< BLOBNBOX, BLOBNBOX_CLIST, BLOBNBOX_C_IT >
	BBGrid ()

	BBGrid (int gridsize, const ICOORD &bleft, const ICOORD &tright)

	~BBGrid () override

void	Init (int gridsize, const ICOORD &bleft, const ICOORD &tright)

void	Clear ()

void	ClearGridData (void(free_method)(BLOBNBOX ))

void	InsertBBox (bool h_spread, bool v_spread, BLOBNBOX *bbox)

void	InsertPixPtBBox (int left, int bottom, Pix pix, BLOBNBOX bbox)

void	RemoveBBox (BLOBNBOX *bbox)

bool	RectangleEmpty (const TBOX &rect)

IntGrid *	CountCellElements ()

ScrollView *	MakeWindow (int x, int y, const char *window_name)

void	DisplayBoxes (ScrollView *window)

void	AssertNoDuplicates ()

virtual void	HandleClick (int x, int y)

Public Member Functions inherited from tesseract::GridBase
	GridBase ()=default

	GridBase (int gridsize, const ICOORD &bleft, const ICOORD &tright)

virtual	~GridBase ()

void	Init (int gridsize, const ICOORD &bleft, const ICOORD &tright)

int	gridsize () const

int	gridwidth () const

int	gridheight () const

const ICOORD &	bleft () const

const ICOORD &	tright () const

void	GridCoords (int x, int y, int grid_x, int grid_y) const

void	ClipGridCoords (int x, int y) const

Static Public Member Functions
static bool	WithinTestRegion (int detail_level, int x, int y)

Additional Inherited Members
Protected Attributes inherited from tesseract::BBGrid< BLOBNBOX, BLOBNBOX_CLIST, BLOBNBOX_C_IT >
BLOBNBOX_CLIST *	grid_

Protected Attributes inherited from tesseract::GridBase
int	gridsize_

int	gridwidth_

int	gridheight_

int	gridbuckets_

ICOORD	bleft_

ICOORD	tright_

Detailed Description

Definition at line 81 of file alignedblob.h.

Constructor & Destructor Documentation

◆ AlignedBlob()

tesseract::AlignedBlob::AlignedBlob	(	int	gridsize,
		const ICOORD &	bleft,
		const ICOORD &	tright
	)

Definition at line 143 of file alignedblob.cpp.

145 : BlobGrid(gridsize, bleft, tright) {

146 }

◆ ~AlignedBlob()

tesseract::AlignedBlob::~AlignedBlob ( )

overridedefault

Member Function Documentation

◆ DisplayTabs()

ScrollView * tesseract::AlignedBlob::DisplayTabs	(	const char *	window_name,
		ScrollView *	tab_win
	)

Definition at line 158 of file alignedblob.cpp.

                                                           {
 #ifndef GRAPHICS_DISABLED
   if (tab_win == nullptr)
     tab_win = MakeWindow(0, 50, window_name);
   // For every tab in the grid, display it.
   GridSearch<BLOBNBOX, BLOBNBOX_CLIST, BLOBNBOX_C_IT> gsearch(this);
   gsearch.StartFullSearch();
   BLOBNBOX* bbox;
   while ((bbox = gsearch.NextFullSearch()) != nullptr) {
     const TBOX& box = bbox->bounding_box();
     int left_x = box.left();
     int right_x = box.right();
     int top_y = box.top();
     int bottom_y = box.bottom();
     TabType tabtype = bbox->left_tab_type();
     if (tabtype != TT_NONE) {
       if (tabtype == TT_MAYBE_ALIGNED)
         tab_win->Pen(ScrollView::BLUE);
       else if (tabtype == TT_MAYBE_RAGGED)
         tab_win->Pen(ScrollView::YELLOW);
       else if (tabtype == TT_CONFIRMED)
         tab_win->Pen(ScrollView::GREEN);
       else
         tab_win->Pen(ScrollView::GREY);
       tab_win->Line(left_x, top_y, left_x, bottom_y);
     }
     tabtype = bbox->right_tab_type();
     if (tabtype != TT_NONE) {
       if (tabtype == TT_MAYBE_ALIGNED)
         tab_win->Pen(ScrollView::MAGENTA);
       else if (tabtype == TT_MAYBE_RAGGED)
         tab_win->Pen(ScrollView::ORANGE);
       else if (tabtype == TT_CONFIRMED)
         tab_win->Pen(ScrollView::RED);
       else
         tab_win->Pen(ScrollView::GREY);
       tab_win->Line(right_x, top_y, right_x, bottom_y);
     }
   }
   tab_win->Update();
 #endif
   return tab_win;
 }

◆ FindVerticalAlignment()

TabVector * tesseract::AlignedBlob::FindVerticalAlignment	(	AlignedBlobParams	align_params,
		BLOBNBOX *	bbox,
		int *	vertical_x,
		int *	vertical_y
	)

Definition at line 225 of file alignedblob.cpp.

                                                                {
   int ext_start_y, ext_end_y;
   BLOBNBOX_CLIST good_points;
   // Search up and then down from the starting bbox.
   TBOX box = bbox->bounding_box();
   bool debug = WithinTestRegion(2, box.left(), box.bottom());
   int pt_count = AlignTabs(align_params, false, bbox, &good_points, &ext_end_y);
   pt_count += AlignTabs(align_params, true, bbox, &good_points, &ext_start_y);
   BLOBNBOX_C_IT it(&good_points);
   it.move_to_last();
   box = it.data()->bounding_box();
   int end_y = box.top();
   int end_x = align_params.right_tab ? box.right() : box.left();
   it.move_to_first();
   box = it.data()->bounding_box();
   int start_x = align_params.right_tab ? box.right() : box.left();
   int start_y = box.bottom();
   // Acceptable tab vectors must have a minimum number of points,
   // have a minimum acceptable length, and have a minimum gradient.
   // The gradient corresponds to the skew angle.
   // Ragged tabs don't need to satisfy the gradient condition, as they
   // will always end up parallel to the vertical direction.
   bool at_least_2_crossings = AtLeast2LineCrossings(&good_points);
   if ((pt_count >= align_params.min_points &&
       end_y - start_y >= align_params.min_length &&
       (align_params.ragged ||
           end_y - start_y >= abs(end_x - start_x) * kMinTabGradient)) ||
       at_least_2_crossings) {
     int confirmed_points = 0;
     // Count existing confirmed points to see if vector is acceptable.
     for (it.mark_cycle_pt(); !it.cycled_list(); it.forward()) {
       bbox = it.data();
       if (align_params.right_tab) {
         if (bbox->right_tab_type() == align_params.confirmed_type)
           ++confirmed_points;
       } else {
         if (bbox->left_tab_type() == align_params.confirmed_type)
           ++confirmed_points;
       }
     }
     // Ragged vectors are not allowed to use too many already used points.
     if (!align_params.ragged ||
         confirmed_points + confirmed_points < pt_count) {
       const TBOX& box = bbox->bounding_box();
       if (debug) {
         tprintf("Confirming tab vector of %d pts starting at %d,%d\n",
                 pt_count, box.left(), box.bottom());
       }
       // Flag all the aligned neighbours as confirmed .
       for (it.mark_cycle_pt(); !it.cycled_list(); it.forward()) {
         bbox = it.data();
         if (align_params.right_tab) {
           bbox->set_right_tab_type(align_params.confirmed_type);
         } else {
           bbox->set_left_tab_type(align_params.confirmed_type);
         }
         if (debug) {
           bbox->bounding_box().print();
         }
       }
       // Now make the vector and return it.
       TabVector* result = TabVector::FitVector(align_params.alignment,
                                                align_params.vertical,
                                                ext_start_y, ext_end_y,
                                                &good_points,
                                                vertical_x, vertical_y);
       result->set_intersects_other_lines(at_least_2_crossings);
       if (debug) {
         tprintf("Box was %d, %d\n", box.left(), box.bottom());
         result->Print("After fitting");
       }
       return result;
     } else if (debug) {
       tprintf("Ragged tab used too many used points: %d out of %d\n",
               confirmed_points, pt_count);
     }
   } else if (debug) {
     tprintf("Tab vector failed basic tests: pt count %d vs min %d, "
             "length %d vs min %d, min grad %g\n",
             pt_count, align_params.min_points, end_y - start_y,
             align_params.min_length, abs(end_x - start_x) * kMinTabGradient);
   }
   return nullptr;
 }

◆ WithinTestRegion()

bool tesseract::AlignedBlob::WithinTestRegion	(	int	detail_level,
		int	x,
		int	y
	)

static

Definition at line 150 of file alignedblob.cpp.

                                                                  {
   if (textord_debug_tabfind < detail_level)
     return false;
   return x >= textord_testregion_left && x <= textord_testregion_right &&
          y <= textord_testregion_top && y >= textord_testregion_bottom;
 }

The documentation for this class was generated from the following files:

/tesseract/src/textord/alignedblob.h
/tesseract/src/textord/alignedblob.cpp

Public Member Functions

Static Public Member Functions

Additional Inherited Members