Method close

czxing/src/main/cpp/zxing/src/BinaryBitmap.cpp:85–97

}

void BinaryBitmap::close()
{
	if (_cache->matrix) {
		auto& matrix = *const_cast<BitMatrix*>(_cache->matrix.get());
		BitMatrix tmp(matrix.width(), matrix.height());

		// dilate
		SumFilter(matrix, tmp, [](int sum) { return (sum > 0 * BitMatrix::SET_V) * BitMatrix::SET_V; });
		// erode
		SumFilter(tmp, matrix, [](int sum) { return (sum == 9 * BitMatrix::SET_V) * BitMatrix::SET_V; });
	}
	_closed = true;
}

} // ZXing