uv-twain/huagao/ImageProcess/ImageApplyRotation.cpp

#include "ImageApplyRotation.h"
#define USE_TESSERCAT

#ifdef USE_TESSERCAT
//#define HG_GPDF_API_BUILD
#include "hg_gpdf.h"
#endif

CImageApplyRotation::CImageApplyRotation(RotationType rotation, bool isBackTransposed, int dpi, const char* tessdataPath)
	: m_rotation(rotation)
	, m_backTranspose(isBackTransposed)
	, m_dpi(dpi)
	, osd(nullptr)
{
	if (rotation == RotationType::AutoTextOrientation)
	{
#ifdef USE_TESSERCAT
		osd = new HG_OCR();
		reinterpret_cast<HG_OCR*>(osd)->init(tessdataPath, HG_OCR::RECOGNITION_OSD);
#endif
	}
}

CImageApplyRotation::~CImageApplyRotation()
{
#ifdef USE_TESSERCAT
	if (osd) delete reinterpret_cast<HG_OCR*>(osd);
#endif
}

void CImageApplyRotation::apply(cv::Mat & pDib, int side)
{
	m_angleResult = 0;
#ifdef LOG
	FileTools::write_log("imgprc.txt", "enter CImageApplyRotation apply");
#endif // LOG
	if (pDib.empty())
	{
#ifdef LOG
		FileTools::write_log("imgprc.txt", "exit CImageApplyRotation apply");
#endif // LOG
		return;
	}

	if (m_rotation == RotationType::AutoTextOrientation)	//<2F>Զ<EFBFBD><D4B6>ı<EFBFBD><C4B1><EFBFBD><EFBFBD><EFBFBD>ʶ<EFBFBD><CAB6>
	{
#ifdef USE_TESSERCAT
        if (osd)
        {
            cv::Mat temp;
			if (m_dpi != 200)
			{
				double scale = 200 / static_cast<double>(m_dpi);
				int new_w = (pDib.cols * scale + 3) / 4 * 4;
				int new_h = pDib.rows * scale;
				cv::resize(pDib, temp, cv::Size(new_w, new_h));
			}
			else
				temp = pDib(cv::Rect(0, 0, pDib.cols / 4 * 4, pDib.rows)).clone();

            if (temp.channels() == 3)
                cv::cvtColor(temp, temp, cv::COLOR_BGR2GRAY);
            cv::threshold(temp, temp, 180, 255, cv::THRESH_OTSU);

			HG_OCR* ptr_osd = reinterpret_cast<HG_OCR*>(osd);
            int orientation = ptr_osd->orientation(temp.data, temp.cols, temp.rows, temp.channels(), 200);

            switch (orientation)
            {
            case 90:
                cv::transpose(pDib, pDib);
				cv::flip(pDib, pDib, 0);
				m_angleResult = 90;
                break;
            case 180:
				cv::flip(pDib, pDib, 0);
				cv::flip(pDib, pDib, 1);
				m_angleResult = 180;
                break;
            case 270:
				cv::transpose(pDib, pDib);
				cv::flip(pDib, pDib, 1);
				m_angleResult = 270;
                break;
            default:
				m_angleResult = 0;
                break;
            }
        }
#endif
	}
	else if (m_backTranspose && side == 1)	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת180
	{
		if (m_rotation != RotationType::Rotate_180)	//<2F><>ת180<38><30>
		{
			if (m_rotation == RotationType::Rotate_90_clockwise || m_rotation == RotationType::Rotate_90_anti_clockwise)	//90<39><30>  -90<39><30>
			{
				transpose(pDib, pDib);
				flip(pDib, pDib, m_rotation == RotationType::Rotate_90_clockwise ? 0 : 1);
				m_angleResult = m_rotation == RotationType::Rotate_90_clockwise ? 270 : 90;
			}
			else
			{
				flip(pDib, pDib, 0);
				flip(pDib, pDib, 1);
				m_angleResult = 180;
			}
		}
	}
	else //zh
	{
		if (m_rotation == RotationType::Rotate_90_clockwise || m_rotation == RotationType::Rotate_90_anti_clockwise)	//90<39><30>  -90<39><30>
		{
			transpose(pDib, pDib);
			flip(pDib, pDib, m_rotation == RotationType::Rotate_90_clockwise ? 1 : 0);
			m_angleResult = m_rotation == RotationType::Rotate_90_clockwise ? 90 : 270;
		}
		else if (m_rotation == RotationType::Rotate_180)
		{
			flip(pDib, pDib, 0);
			flip(pDib, pDib, 1);
			m_angleResult = 180;
		}
	}
#ifdef LOG
	FileTools::write_log("imgprc.txt", "exit CImageApplyRotation apply");
#endif // LOG
}

void CImageApplyRotation::apply(std::vector<cv::Mat>& mats, bool isTwoSide)
{
    (void)isTwoSide;
	m_angleResults.clear();
	int i = 0;
	for (cv::Mat& var : mats) {
		if (!var.empty()) {
			apply(var, i);
			m_angleResults.push_back(m_angleResult);
			i++;
		}
	}
}