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Updated character segmenter to break blocks into smaller pieces.

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Matt Hill
2014-01-29 15:54:30 -06:00
parent 7808cce33a
commit 8a9b4e1bae
3 changed files with 78 additions and 4 deletions
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29
src/openalpr/charactersegmenter.cpp
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@@ -292,9 +292,36 @@ vector<Rect> CharacterSegmenter::getHistogramBoxes(VerticalHistogram histogram,
{
charBoxes.push_back(allBoxes[i]);
}
else if (allBoxes[i].width > MAX_SEGMENT_WIDTH && allBoxes[i].height > MIN_HISTOGRAM_HEIGHT)
else if (allBoxes[i].width > avgCharWidth * 2 && allBoxes[i].width < MAX_SEGMENT_WIDTH * 2 && allBoxes[i].height > MIN_HISTOGRAM_HEIGHT)
{
// rectangle(histogram.histoImg, allBoxes[i], Scalar(255, 0, 0) );
// drawAndWait(&histogram.histoImg);
// Try to split up doubles into two good char regions, check for a break between 40% and 60%
int leftEdge = allBoxes[i].x + (int) (((float) allBoxes[i].width) * 0.4f);
int rightEdge = allBoxes[i].x + (int) (((float) allBoxes[i].width) * 0.6f);
int minX = histogram.getLocalMinimum(leftEdge, rightEdge);
int maxXChar1 = histogram.getLocalMaximum(allBoxes[i].x, minX);
int maxXChar2 = histogram.getLocalMaximum(minX, allBoxes[i].x + allBoxes[i].width);
int minHeight = histogram.getHeightAt(minX);
int maxHeightChar1 = histogram.getHeightAt(maxXChar1);
int maxHeightChar2 = histogram.getHeightAt(maxXChar2);
if (maxHeightChar1 > MIN_HISTOGRAM_HEIGHT && minHeight < (0.25 * ((float) maxHeightChar1)))
{
cout << "GOODY GOODY LEFT" << endl;
// Add a box for Char1
Point botRight = Point(minX - 1, allBoxes[i].y + allBoxes[i].height);
charBoxes.push_back(Rect(allBoxes[i].tl(), botRight) );
}
if (maxHeightChar2 > MIN_HISTOGRAM_HEIGHT && minHeight < (0.25 * ((float) maxHeightChar2)))
{
cout << "GOODY GOODY RIGHT" << endl;
// Add a box for Char2
Point topLeft = Point(minX + 1, allBoxes[i].y);
charBoxes.push_back(Rect(topLeft, allBoxes[i].br()) );
}
}
}