bool goodCornerCheck(const Vec2f &corner, Mat &img) {
double r = frameSize.width/60.0;
double theta = CV_PI/180;
vector<double> boundaryAngles;
if (checkNonZero(Point(corner), img) == 0)
return false;
for (double angle = 0; angle < 2*CV_PI-0.01; angle += theta) {
Vec2f boundary = Vec2f(r*cos(angle), r*sin(angle)) + corner;
Point boundaryPoint(boundary);
if (boundaryPoint.x < 0 || boundaryPoint.x >= frameSize.width || boundaryPoint.y < 0 || boundaryPoint.y >= frameSize.height)
continue;
if (checkNonZero(boundaryPoint, img) > 0) {
bool angleExists = false;
for (double prevAngle : boundaryAngles) {
if (abs(prevAngle - (angle - 2 * CV_PI)) < CV_PI/6) {
angleExists = true;
break;
}
}
if (!angleExists)
boundaryAngles.push_back(angle);
if (checkNonZero(Point((boundary + corner)/2), img) == 0
|| checkNonZero(Point(boundary*0.25 + corner*0.75), img) == 0
|| checkNonZero(Point(boundary*0.75 + corner*0.25), img) == 0)
return false;
else
angle += CV_PI/6;
}
}
if (boundaryAngles.size() == 2)
return !(abs(abs(boundaryAngles[0] - boundaryAngles[1]) - CV_PI) < CV_PI/4);
else
return boundaryAngles.size() > 1;
}
void TextStruct::getBoundaryPoly(CPoly& boundary,double spaceRatio) const
{
boundary.init();
CDoubleArray lineLengths;
double maxLineLength = getMaxLineLengthInFontUnits(spaceRatio,&lineLengths);
int lineCount = lineLengths.GetSize();
double charCellHeight = m_height * (1.0 + spaceRatio);
CPoint2d initialCharacterPosition = getInitialCharacterPosition(maxLineLength,lineCount,spaceRatio);
CPoint2d boundaryPoint(initialCharacterPosition);
boundaryPoint.y += charCellHeight;
boundary.addVertex(boundaryPoint);
for (int index = 0;index < lineLengths.GetSize();index++)
{
double lineLength = lineLengths.GetAt(index) * m_width;
boundaryPoint.x = initialCharacterPosition.x + lineLength;
boundary.addVertex(boundaryPoint);
boundaryPoint.y -= charCellHeight;
boundary.addVertex(boundaryPoint);
}
boundaryPoint.x = initialCharacterPosition.x;
boundary.addVertex(boundaryPoint);
boundary.close();
}
