tesseract::CCNonTextDetect Class Reference

#include <ccnontextdetect.h>

Inheritance diagram for tesseract::CCNonTextDetect:

List of all members.

Public Member Functions
	CCNonTextDetect (int gridsize, const ICOORD &bleft, const ICOORD &tright)
virtual	~CCNonTextDetect ()
Pix *	ComputeNonTextMask (bool debug, Pix *photo_map, TO_BLOCK *blob_block)

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Detailed Description

Definition at line 31 of file ccnontextdetect.h.

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Constructor & Destructor Documentation

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

Definition at line 65 of file ccnontextdetect.cpp.

                         {
  // TODO(rays) break max_noise_count_ out into an area-proportional
  // value, as now plus an additive constant for the number of text blobs
  // in the 3x3 neighbourhood - maybe 9.
}

CCNonTextDetect::~CCNonTextDetect() {
  delete noise_density_;

tesseract::CCNonTextDetect::~CCNonTextDetect

(

)

[virtual]

Definition at line 76 of file ccnontextdetect.cpp.

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Member Function Documentation

Pix * tesseract::CCNonTextDetect::ComputeNonTextMask	(	bool	debug,
		Pix *	photo_map,
		TO_BLOCK *	blob_block
	)

Definition at line 89 of file ccnontextdetect.cpp.

                                                                           {
    BLOBNBOX* blob = blob_it.data();
    double perimeter_area_ratio = blob->cblob()->perimeter() / 4.0;
    perimeter_area_ratio *= perimeter_area_ratio / blob->enclosed_area();
    if (blob->GoodTextBlob() == 0 || perimeter_area_ratio < kMinGoodTextPARatio)
      InsertBBox(true, true, blob);
    else
      good_grid.InsertBBox(true, true, blob);
  }
  noise_density_ = ComputeNoiseDensity(debug, photo_map, &good_grid);
  good_grid.Clear();  // Not needed any more.
  Pix* pix = noise_density_->ThresholdToPix(max_noise_count_);
  if (debug) {
    pixWrite("junknoisemask.png", pix, IFF_PNG);
  }
  ScrollView* win = NULL;
  #ifndef GRAPHICS_DISABLED
  if (debug) {
    win = MakeWindow(0, 400, "Photo Mask Blobs");
  }
  #endif  // GRAPHICS_DISABLED
  // Large and medium blobs are not text if they overlap with "a lot" of small
  // blobs.
  MarkAndDeleteNonTextBlobs(&blob_block->large_blobs,
                            kMaxLargeOverlapsWithSmall,
                            win, ScrollView::DARK_GREEN, pix);
  MarkAndDeleteNonTextBlobs(&blob_block->blobs, kMaxMediumOverlapsWithSmall,
                          win, ScrollView::WHITE, pix);
  // Clear the grid of small blobs and insert the medium blobs.
  Clear();
  InsertBlobList(&blob_block->blobs);
  MarkAndDeleteNonTextBlobs(&blob_block->large_blobs,
                            kMaxLargeOverlapsWithMedium,
                            win, ScrollView::DARK_GREEN, pix);
  // Clear again before we start deleting the blobs in the grid.
  Clear();
  MarkAndDeleteNonTextBlobs(&blob_block->noise_blobs, -1,
                            win, ScrollView::CORAL, pix);
  MarkAndDeleteNonTextBlobs(&blob_block->small_blobs, -1,
                            win, ScrollView::GOLDENROD, pix);
  MarkAndDeleteNonTextBlobs(&blob_block->blobs, -1,
                            win, ScrollView::WHITE, pix);
  if (debug) {
    #ifndef GRAPHICS_DISABLED
    win->Update();
    #endif  // GRAPHICS_DISABLED
    pixWrite("junkccphotomask.png", pix, IFF_PNG);
    #ifndef GRAPHICS_DISABLED
    delete win->AwaitEvent(SVET_DESTROY);
    delete win;
    #endif  // GRAPHICS_DISABLED
  }
  return pix;
}

// Computes and returns the noise_density IntGrid, at the same gridsize as
// this by summing the number of small elements in a 3x3 neighbourhood of

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

• textord/ccnontextdetect.h
• textord/ccnontextdetect.cpp