Digikam::QtOpenCVImg Class Reference

Public Types
enum	MatColorOrder {   MCO_BGR , MCO_RGB , MCO_BGRA = MCO_BGR , MCO_RGBA = MCO_RGB ,   MCO_ARGB , MCO_INVALID }

Static Public Member Functions
static cv::Mat	image2Mat (const DImg &img, int requiredMatType=CV_8UC(0), MatColorOrder requiredOrder=MCO_BGR)
	Convert DImg to cv::Mat.
static cv::Mat	image2Mat (const QImage &img, int requiredMatType=CV_8UC(0), MatColorOrder requiredOrder=MCO_BGR)
	Convert QImage from cv::Mat.
static cv::Mat	image2Mat_shared (const QImage &img, MatColorOrder *const order=nullptr)
	Convert QImage to/from cv::Mat without data copy.
static QImage	mat2Image (const cv::Mat &mat, MatColorOrder order=MCO_BGR, QImage::Format formatHint=QImage::Format_Invalid)
	Convert cv::Mat to QImage.
static QImage	mat2Image_shared (const cv::Mat &mat, QImage::Format formatHint=QImage::Format_Invalid)
	Convert QImage to cv::Mat without data copy.

Member Function Documentation

image2Mat()

cv::Mat Digikam::QtOpenCVImg::image2Mat ( const QImage &  img, int  requiredMatType = CV_8UC(0), MatColorOrder  requiredOrder = MCO_BGR  )

static

• cv::Mat
  • Supported channels
    • 1 channel
    • 3 channels (B G R), (R G B)
    • 4 channels (B G R A), (R G B A), (A R G B)
  • Supported depth
    • CV_8U [0, 255]
    • CV_16U [0, 65535]
    • CV_32F [0, 1.0]
• QImage
  • All of the formats of QImage are supported.

image2Mat_shared()

cv::Mat Digikam::QtOpenCVImg::image2Mat_shared ( const QImage &  img, MatColorOrder *const  order = nullptr  )

static

• Supported QImage formats and cv::Mat types are:
  • QImage::Format_Indexed8 <==> CV_8UC1
  • QImage::Format_Alpha8 <==> CV_8UC1
  • QImage::Format_Grayscale8 <==> CV_8UC1
  • QImage::Format_RGB888 <==> CV_8UC3 (R G B)
  • QImage::Format_RGB32 <==> CV_8UC4 (A R G B or B G R A)
  • QImage::Format_ARGB32 <==> CV_8UC4 (A R G B or B G R A)
  • QImage::Format_ARGB32_Premultiplied <==> CV_8UC4 (A R G B or B G R A)
  • QImage::Format_RGBX8888 <==> CV_8UC4 (R G B A)
  • QImage::Format_RGBA8888 <==> CV_8UC4 (R G B A)
  • QImage::Format_RGBA8888_Premultiplied <==> CV_8UC4 (R G B A)
• For QImage::Format_RGB32 ,QImage::Format_ARGB32 and QImage::Format_ARGB32_Premultiplied, the color channel order of cv::Mat will be (B G R A) in little endian system or (A R G B) in big endian system.
• User must make sure that the color channels order is the same as the color channels order required by QImage.

mat2Image()

QImage Digikam::QtOpenCVImg::mat2Image ( const cv::Mat &  mat, MatColorOrder  order = MCO_BGR, QImage::Format  formatHint = QImage::Format_Invalid  )

static

Note

same support than image2Mat().

mat2Image_shared()

QImage Digikam::QtOpenCVImg::mat2Image_shared ( const cv::Mat &  mat, QImage::Format  formatHint = QImage::Format_Invalid  )

static

Note

same support than image2Mat_shared().