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Using median calculation for charwidth/height rather than average

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Matt Hill
2014-01-29 22:36:41 -06:00
parent da2a0da57e
commit fe0d58aeb9
1 changed files with 10 additions and 8 deletions
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18
src/openalpr/charactersegmenter.cpp
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@@ -93,28 +93,30 @@ CharacterSegmenter::CharacterSegmenter(Mat img, bool invertedColors, Config* con
imgDbgGeneral.push_back(bordered); imgDbgGeneral.push_back(bordered);
} }
// Figure out the average character width
float totalCharWidth = 0;
float totalCharHeight = 0;
if (charAnalysis->linePolygon.size() > 0) if (charAnalysis->linePolygon.size() > 0)
{ {
this->top = LineSegment(charAnalysis->linePolygon[0].x, charAnalysis->linePolygon[0].y, charAnalysis->linePolygon[1].x, charAnalysis->linePolygon[1].y); this->top = LineSegment(charAnalysis->linePolygon[0].x, charAnalysis->linePolygon[0].y, charAnalysis->linePolygon[1].x, charAnalysis->linePolygon[1].y);
this->bottom = LineSegment(charAnalysis->linePolygon[3].x, charAnalysis->linePolygon[3].y, charAnalysis->linePolygon[2].x, charAnalysis->linePolygon[2].y); this->bottom = LineSegment(charAnalysis->linePolygon[3].x, charAnalysis->linePolygon[3].y, charAnalysis->linePolygon[2].x, charAnalysis->linePolygon[2].y);
vector<int> charWidths;
vector<int> charHeights;
for (int i = 0; i < charAnalysis->bestContours.size(); i++) for (int i = 0; i < charAnalysis->bestContours.size(); i++)
{ {
if (charAnalysis->bestCharSegments[i] == false) if (charAnalysis->bestCharSegments[i] == false)
continue; continue;
Rect mr = boundingRect(charAnalysis->bestContours[i]); Rect mr = boundingRect(charAnalysis->bestContours[i]);
totalCharWidth += mr.width;
totalCharHeight += mr.height; charWidths.push_back(mr.width);
charHeights.push_back(mr.height);
} }
int numSamples = charAnalysis->bestCharSegmentsCount; float avgCharWidth = median(charWidths.data(), charWidths.size());
float avgCharWidth = totalCharWidth / numSamples; float avgCharHeight = median(charHeights.data(), charHeights.size());
float avgCharHeight = totalCharHeight / numSamples;
removeSmallContours(charAnalysis->thresholds, charAnalysis->allContours, avgCharWidth, avgCharHeight); removeSmallContours(charAnalysis->thresholds, charAnalysis->allContours, avgCharWidth, avgCharHeight);