• 学习opencv_学习笔记三


    第四章 细说HighGUI

    一个可移植的图形工具包

    由以下三部分组成:

    硬件部分

    文件部分

    图形用户界面

    1创建窗口

    所用到函数:

    /* create window 创建窗口*/

    CVAPI(int) cvNamedWindow( const char* name, //窗口名称

    int flags CV_DEFAULT(CV_WINDOW_AUTOSIZE) );//根据图像自动调整大小

    /* destroy window and all the trackers associated with it 销毁窗口 */

    CVAPI(void) cvDestroyWindow( const char* name );//窗口名称

    /* get native window handle (HWND in case of Win32 and Widget in case of X Window) */

    //窗口系统,windows下返回HWND

    CVAPI(void*) cvGetWindowHandle( const char* name );

     

    /* get name of highgui window given its native handle  取得窗口名称*/

    CVAPI(const char*) cvGetWindowName( void* window_handle );

     

    /* resize/move window 调整窗口大小*/

    CVAPI(void) cvResizeWindow( const char* name, int width, int height );

    //移动窗口 ,xy为左上角坐标

    CVAPI(void) cvMoveWindow( const char* name, int x, int y );

     

    示例代码如下:

    #include <opencv2opencv.hpp>

    using namespace cv;

    int main(int argc,char** argv) {

    //创建窗口

    cvNamedWindow("test");

    //调整窗口大小

    cvResizeWindow("test",800,600);

    //移动窗口

    cvMoveWindow("test", 80, 80);

    //等待用户按键

    cvWaitKey();

    //释放窗口

    cvDestroyWindow("test");

    }

    2载入图像

    所用到函数

    //载入图像

    CVAPI(IplImage*) cvLoadImage( const char* filename, // 文件名

    int iscolor CV_DEFAULT(CV_LOAD_IMAGE_COLOR));//

     

    Iscolor的常量值

    /* 8bit, color or not */

        CV_LOAD_IMAGE_UNCHANGED  =-1,

    /* 8bit, gray */

        CV_LOAD_IMAGE_GRAYSCALE  =0, //单通道

    /* ?, color */

        CV_LOAD_IMAGE_COLOR      =1, //三通道

    /* any depth, ? */

        CV_LOAD_IMAGE_ANYDEPTH   =2,//非8位图像

    /* ?, any color */

        CV_LOAD_IMAGE_ANYCOLOR   =4 //原始通道读入

     

     

    //保存图像

    /* save image to file */

    CVAPI(int) cvSaveImage( const char* filename, //文件名

    const CvArr* image, //图像数组,

                            const int* params CV_DEFAULT(0) );

     

    3显示图像

    /* display image within window (highgui windows remember their content) */

    CVAPI(void) cvShowImage( const char* name, //窗口名称

    const CvArr* image );//图像 IplImage*

     

    //关闭所有窗口,释放内存

    CVAPI(void) cvDestroyAllWindows(void);

     

    //创建线程,处理窗口更新

    CVAPI(int) cvStartWindowThread( void );

     

    //等待用户按键,为0时无限等待

    /* wait for key event infinitely (delay<=0) or for "delay" milliseconds */

    CVAPI(int) cvWaitKey(int delay CV_DEFAULT(0));

     

    示例代码如下:

     

     

     

     

    鼠标事件

    //回调函数的格式

    typedef void (CV_CDECL *CvMouseCallback )(int event, //事件类型

    int x, //事件发生时鼠标位置

    int y,

    int flags, //事件发生时的不同状态

    void* param); //额外参数

     

    Event的取值:

    CV_EVENT_MOUSEMOVE      =0,

        CV_EVENT_LBUTTONDOWN    =1,

        CV_EVENT_RBUTTONDOWN    =2,

        CV_EVENT_MBUTTONDOWN    =3,

        CV_EVENT_LBUTTONUP      =4,

        CV_EVENT_RBUTTONUP      =5,

        CV_EVENT_MBUTTONUP      =6,

        CV_EVENT_LBUTTONDBLCLK  =7,

        CV_EVENT_RBUTTONDBLCLK  =8,

        CV_EVENT_MBUTTONDBLCLK  =9,

        CV_EVENT_MOUSEWHEEL     =10,

    CV_EVENT_MOUSEHWHEEL    =11

     

    Flag的取值

    CV_EVENT_FLAG_LBUTTON   =1,

        CV_EVENT_FLAG_RBUTTON   =2,

        CV_EVENT_FLAG_MBUTTON   =4,

        CV_EVENT_FLAG_CTRLKEY   =8,

        CV_EVENT_FLAG_SHIFTKEY  =16,

    CV_EVENT_FLAG_ALTKEY    =32

     

    //注册回调函数

    /* assign callback for mouse events */

    CVAPI(void) cvSetMouseCallback( const char* window_name, //窗体名称

    CvMouseCallback on_mouse,//回调函数

                                    void* param CV_DEFAULT(NULL));//额外信息

     

    示例代码:

    #include <opencv2opencv.hpp>

    using namespace cv;

    //鼠标在窗口中画方形的程序

    //函数声明

    void my_mouse_callback(int event, int x,int y,int flags,void* param);

    //矩形

    CvRect box;

    //绘制状态

    bool drawing_box = false;

    //绘制矩形

    void draw_box(IplImage* img, CvRect rect) {

    cvRectangle(

    img,//目标图像

    cvPoint(box.x, box.y),//矩形坐标

    cvPoint(box.x + box.width, box.y + box.height),

    cvScalar(0xff,0x00,0x00)//颜色

    );

    }

    int main(int argc,char** argv) {

    box = cvRect(-1,-1,0,0);

    //创建图像

    IplImage* image = cvCreateImage(

    cvSize(800,600),

    IPL_DEPTH_8U,

    3

    );

    cvZero(image);

    IplImage* temp = cvCloneImage(image);

    //创建窗口

    cvNamedWindow("Box Example");

    //注册鼠标加调函数

    cvSetMouseCallback(

    "Box Example",

    my_mouse_callback,

    (void*) image

    );

    while (1)

    {

    cvCopy(image,temp);//复制图像

    if (drawing_box) {

    draw_box(temp,box);

    }

    cvShowImage("Box Example", temp);//显示图片

    //esc退出

    if (cvWaitKey(15) == 27) {

    break;

    }

    }

    //清理工作

    cvReleaseImage(&image);

    cvReleaseImage(&temp);

    cvDestroyWindow("Box Example");

    }

    /*

    鼠标事件回调函数

    */

    void my_mouse_callback(int event, int x, int y, int flags, void* param) {

    IplImage* image = (IplImage*)param;

    switch (event)

    {

    case CV_EVENT_MOUSEMOVE: {

    if (drawing_box) {

    box.width = x - box.x;

    box.height = y - box.y;

    }

    }

    break;

    case CV_EVENT_LBUTTONDOWN: {//鼠标标按下开始绘制矩形

    drawing_box = true;

    box = cvRect(x, y, 0, 0);

    }

    break;

    case CV_EVENT_LBUTTONUP: {//绘制矩形

    drawing_box = false;

    if (box.width < 0) {

    box.x += box.width;

    box.width *= -1;

    }

    if (box.height) {

    box.y += box.height;

    box.height *= -1;

    }

    draw_box(image,box);

    }

    break;

    default:

    break;

    }

    }

     

    Sliders  trackbars  switches

    //滑动条

    /* create trackbar and display it on top of given window, set callback */

    CVAPI(int) cvCreateTrackbar( const char* trackbar_name, //滑动条名称

    const char* window_name, //所属窗体名称

                                 int* value, //当前值 position

     int count, //最大值

    //指向回调函数的指针

    CvTrackbarCallback on_change CV_DEFAULT(NULL));

     

    //读取和设置滚动条

    /* retrieve or set trackbar position */

    CVAPI(int) cvGetTrackbarPos( const char* trackbar_name, //滑动条名称

    const char* window_name );//窗体名称

    CVAPI(void) cvSetTrackbarPos( const char* trackbar_name, const char* window_name, int pos );

    CVAPI(void) cvSetTrackbarMax(const char* trackbar_name, const char* window_name, int maxval);

    CVAPI(void) cvSetTrackbarMin(const char* trackbar_name, const char* window_name, int minval);

     

     

    #include <opencv2opencv.hpp>

    using namespace cv;

    //滑动条,实现开关功能

    int g_switch_value = 0;

    //滑动条回调函数

    void Switch_callback(int position) {

    if (position==0) {

    //switch_off_function();

    }

    else {

    //switch_on_function();

    }

    }

    int main(int argc,char** argv) {

    cvNamedWindow("Demo Windows",1);

    //创建滑动条

    cvCreateTrackbar(

    "Switch",//滑动条名称

    "Demo Windows",//所属窗体

    &g_switch_value,//当前值

    1,//最大值

    Switch_callback//回调函数

    );

    while (1)

    {

    if (cvWaitKey(15) == 27) {

    break;

    }

    }

    }

     

     

    4视频处理

     

    //读取视频文件

    /* start capturing frames from video file */

    CVAPI(CvCapture*) cvCreateFileCapture( const char* filename );//视频文件名

     

    //读摄像头视频

    /* start capturing frames from camera: index = camera_index + domain_offset (CV_CAP_*) */

    CVAPI(CvCapture*) cvCreateCameraCapture( int index );

     

    Index所用常量

    CV_CAP_ANY      =0,     // autodetect

        CV_CAP_MIL      =100,   // MIL proprietary drivers

        CV_CAP_VFW      =200,   // platform native

        CV_CAP_V4L      =200,

        CV_CAP_V4L2     =200,

        CV_CAP_FIREWARE =300,   // IEEE 1394 drivers

        CV_CAP_FIREWIRE =300,

        CV_CAP_IEEE1394 =300,

        CV_CAP_DC1394   =300,

        CV_CAP_CMU1394  =300,

        CV_CAP_STEREO   =400,   // TYZX proprietary drivers

        CV_CAP_TYZX     =400,

        CV_TYZX_LEFT    =400,

        CV_TYZX_RIGHT   =401,

        CV_TYZX_COLOR   =402,

        CV_TYZX_Z       =403,

        CV_CAP_QT       =500,   // QuickTime

        CV_CAP_UNICAP   =600,   // Unicap drivers

        CV_CAP_DSHOW    =700,   // DirectShow (via videoInput)

        CV_CAP_MSMF     =1400,  // Microsoft Media Foundation (via videoInput)

        CV_CAP_PVAPI    =800,   // PvAPI, Prosilica GigE SDK

        CV_CAP_OPENNI   =900,   // OpenNI (for Kinect)

        CV_CAP_OPENNI_ASUS =910,   // OpenNI (for Asus Xtion)

        CV_CAP_ANDROID  =1000,  // Android - not used

        CV_CAP_ANDROID_BACK =CV_CAP_ANDROID+99, // Android back camera - not used

        CV_CAP_ANDROID_FRONT =CV_CAP_ANDROID+98, // Android front camera - not used

        CV_CAP_XIAPI    =1100,   // XIMEA Camera API

        CV_CAP_AVFOUNDATION = 1200,  // AVFoundation framework for iOS (OS X Lion will have the same API)

        CV_CAP_GIGANETIX = 1300,  // Smartek Giganetix GigEVisionSDK

        CV_CAP_INTELPERC = 1500, // Intel Perceptual Computing

        CV_CAP_OPENNI2 = 1600,   // OpenNI2 (for Kinect)

        CV_CAP_GPHOTO2 = 1700,

        CV_CAP_GSTREAMER = 1800, // GStreamer

        CV_CAP_FFMPEG = 1900,    // FFMPEG

        CV_CAP_IMAGES = 2000     // OpenCV Image Sequence (e.g. img_%02d.jpg)

     

     

    读视频

    //

    /* grab a frame, return 1 on success, 0 on fail.

      this function is thought to be fast               */

    CVAPI(int) cvGrabFrame( CvCapture* capture );

     

    /* get the frame grabbed with cvGrabFrame(..)

      This function may apply some frame processing like

      frame decompression, flipping etc.

      !!!DO NOT RELEASE or MODIFY the retrieved frame!!! */

    CVAPI(IplImage*) cvRetrieveFrame( CvCapture* capture,

    int streamIdx CV_DEFAULT(0) );

     

    /* Just a combination of cvGrabFrame and cvRetrieveFrame

       !!!DO NOT RELEASE or MODIFY the retrieved frame!!!      */

    CVAPI(IplImage*) cvQueryFrame( CvCapture* capture );

     

     

    //读取和设置视频属性

    /* retrieve or set capture properties */

    CVAPI(double) cvGetCaptureProperty( CvCapture* capture,

    int property_id );

    CVAPI(int)    cvSetCaptureProperty( CvCapture* capture,

    int property_id,

    double value );

    property_id 的取值

     CV_CAP_PROP_DC1394_OFF         = -4,  //turn the feature off (not controlled manually nor automatically)

        CV_CAP_PROP_DC1394_MODE_MANUAL = -3, //set automatically when a value of the feature is set by the user

        CV_CAP_PROP_DC1394_MODE_AUTO = -2,

        CV_CAP_PROP_DC1394_MODE_ONE_PUSH_AUTO = -1,

        CV_CAP_PROP_POS_MSEC       =0, //视频的当前位置   毫秒

        CV_CAP_PROP_POS_FRAMES     =1, //以帧为单位的当前值

        CV_CAP_PROP_POS_AVI_RATIO  =2, //0-1之间的数

        CV_CAP_PROP_FRAME_WIDTH    =3, //宽度

        CV_CAP_PROP_FRAME_HEIGHT   =4, //高度

        CV_CAP_PROP_FPS            =5, //每秒钟的帧数

        CV_CAP_PROP_FOURCC         =6, //视频的压缩方法

        CV_CAP_PROP_FRAME_COUNT    =7, //视频的总帧数

        CV_CAP_PROP_FORMAT         =8,

        CV_CAP_PROP_MODE           =9,

        CV_CAP_PROP_BRIGHTNESS    =10,

        CV_CAP_PROP_CONTRAST      =11,

        CV_CAP_PROP_SATURATION    =12,

        CV_CAP_PROP_HUE           =13,

        CV_CAP_PROP_GAIN          =14,

        CV_CAP_PROP_EXPOSURE      =15,

        CV_CAP_PROP_CONVERT_RGB   =16,

        CV_CAP_PROP_WHITE_BALANCE_BLUE_U =17,

        CV_CAP_PROP_RECTIFICATION =18,

        CV_CAP_PROP_MONOCHROME    =19,

        CV_CAP_PROP_SHARPNESS     =20,

        CV_CAP_PROP_AUTO_EXPOSURE =21, // exposure control done by camera,

                                       // user can adjust refernce level

                                       // using this feature

        CV_CAP_PROP_GAMMA         =22,

        CV_CAP_PROP_TEMPERATURE   =23,

        CV_CAP_PROP_TRIGGER       =24,

        CV_CAP_PROP_TRIGGER_DELAY =25,

        CV_CAP_PROP_WHITE_BALANCE_RED_V =26,

        CV_CAP_PROP_ZOOM          =27,

        CV_CAP_PROP_FOCUS         =28,

        CV_CAP_PROP_GUID          =29,

        CV_CAP_PROP_ISO_SPEED     =30,

        CV_CAP_PROP_MAX_DC1394    =31,

        CV_CAP_PROP_BACKLIGHT     =32,

        CV_CAP_PROP_PAN           =33,

        CV_CAP_PROP_TILT          =34,

        CV_CAP_PROP_ROLL          =35,

        CV_CAP_PROP_IRIS          =36,

        CV_CAP_PROP_SETTINGS      =37,

        CV_CAP_PROP_BUFFERSIZE    =38,

        CV_CAP_PROP_AUTOFOCUS     =39,

        CV_CAP_PROP_SAR_NUM       =40,

        CV_CAP_PROP_SAR_DEN       =41,

     

        CV_CAP_PROP_AUTOGRAB      =1024, // property for videoio class CvCapture_Android only

        CV_CAP_PROP_SUPPORTED_PREVIEW_SIZES_STRING=1025, // readonly, tricky property, returns cpnst char* indeed

        CV_CAP_PROP_PREVIEW_FORMAT=1026, // readonly, tricky property, returns cpnst char* indeed

     

        // OpenNI map generators

        CV_CAP_OPENNI_DEPTH_GENERATOR = 1 << 31,

        CV_CAP_OPENNI_IMAGE_GENERATOR = 1 << 30,

        CV_CAP_OPENNI_GENERATORS_MASK = CV_CAP_OPENNI_DEPTH_GENERATOR + CV_CAP_OPENNI_IMAGE_GENERATOR,

     

        // Properties of cameras available through OpenNI interfaces

        CV_CAP_PROP_OPENNI_OUTPUT_MODE     = 100,

        CV_CAP_PROP_OPENNI_FRAME_MAX_DEPTH = 101, // in mm

        CV_CAP_PROP_OPENNI_BASELINE        = 102, // in mm

        CV_CAP_PROP_OPENNI_FOCAL_LENGTH    = 103, // in pixels

        CV_CAP_PROP_OPENNI_REGISTRATION    = 104, // flag

        CV_CAP_PROP_OPENNI_REGISTRATION_ON = CV_CAP_PROP_OPENNI_REGISTRATION, // flag that synchronizes the remapping depth map to image map

                                                                              // by changing depth generator's view point (if the flag is "on") or

                                                                              // sets this view point to its normal one (if the flag is "off").

        CV_CAP_PROP_OPENNI_APPROX_FRAME_SYNC = 105,

        CV_CAP_PROP_OPENNI_MAX_BUFFER_SIZE   = 106,

        CV_CAP_PROP_OPENNI_CIRCLE_BUFFER     = 107,

        CV_CAP_PROP_OPENNI_MAX_TIME_DURATION = 108,

     

        CV_CAP_PROP_OPENNI_GENERATOR_PRESENT = 109,

        CV_CAP_PROP_OPENNI2_SYNC = 110,

        CV_CAP_PROP_OPENNI2_MIRROR = 111,

     

        CV_CAP_OPENNI_IMAGE_GENERATOR_PRESENT         = CV_CAP_OPENNI_IMAGE_GENERATOR + CV_CAP_PROP_OPENNI_GENERATOR_PRESENT,

        CV_CAP_OPENNI_IMAGE_GENERATOR_OUTPUT_MODE     = CV_CAP_OPENNI_IMAGE_GENERATOR + CV_CAP_PROP_OPENNI_OUTPUT_MODE,

        CV_CAP_OPENNI_DEPTH_GENERATOR_BASELINE        = CV_CAP_OPENNI_DEPTH_GENERATOR + CV_CAP_PROP_OPENNI_BASELINE,

        CV_CAP_OPENNI_DEPTH_GENERATOR_FOCAL_LENGTH    = CV_CAP_OPENNI_DEPTH_GENERATOR + CV_CAP_PROP_OPENNI_FOCAL_LENGTH,

        CV_CAP_OPENNI_DEPTH_GENERATOR_REGISTRATION    = CV_CAP_OPENNI_DEPTH_GENERATOR + CV_CAP_PROP_OPENNI_REGISTRATION,

        CV_CAP_OPENNI_DEPTH_GENERATOR_REGISTRATION_ON = CV_CAP_OPENNI_DEPTH_GENERATOR_REGISTRATION,

     

        // Properties of cameras available through GStreamer interface

        CV_CAP_GSTREAMER_QUEUE_LENGTH           = 200, // default is 1

     

        // PVAPI

        CV_CAP_PROP_PVAPI_MULTICASTIP           = 300, // ip for anable multicast master mode. 0 for disable multicast

        CV_CAP_PROP_PVAPI_FRAMESTARTTRIGGERMODE = 301, // FrameStartTriggerMode: Determines how a frame is initiated

        CV_CAP_PROP_PVAPI_DECIMATIONHORIZONTAL  = 302, // Horizontal sub-sampling of the image

        CV_CAP_PROP_PVAPI_DECIMATIONVERTICAL    = 303, // Vertical sub-sampling of the image

        CV_CAP_PROP_PVAPI_BINNINGX              = 304, // Horizontal binning factor

        CV_CAP_PROP_PVAPI_BINNINGY              = 305, // Vertical binning factor

        CV_CAP_PROP_PVAPI_PIXELFORMAT           = 306, // Pixel format

     

        // Properties of cameras available through XIMEA SDK interface

        CV_CAP_PROP_XI_DOWNSAMPLING                                 = 400, // Change image resolution by binning or skipping.

        CV_CAP_PROP_XI_DATA_FORMAT                                  = 401, // Output data format.

        CV_CAP_PROP_XI_OFFSET_X                                     = 402, // Horizontal offset from the origin to the area of interest (in pixels).

        CV_CAP_PROP_XI_OFFSET_Y                                     = 403, // Vertical offset from the origin to the area of interest (in pixels).

        CV_CAP_PROP_XI_TRG_SOURCE                                   = 404, // Defines source of trigger.

        CV_CAP_PROP_XI_TRG_SOFTWARE                                 = 405, // Generates an internal trigger. PRM_TRG_SOURCE must be set to TRG_SOFTWARE.

        CV_CAP_PROP_XI_GPI_SELECTOR                                 = 406, // Selects general purpose input

        CV_CAP_PROP_XI_GPI_MODE                                     = 407, // Set general purpose input mode

        CV_CAP_PROP_XI_GPI_LEVEL                                    = 408, // Get general purpose level

        CV_CAP_PROP_XI_GPO_SELECTOR                                 = 409, // Selects general purpose output

        CV_CAP_PROP_XI_GPO_MODE                                     = 410, // Set general purpose output mode

        CV_CAP_PROP_XI_LED_SELECTOR                                 = 411, // Selects camera signalling LED

        CV_CAP_PROP_XI_LED_MODE                                     = 412, // Define camera signalling LED functionality

        CV_CAP_PROP_XI_MANUAL_WB                                    = 413, // Calculates White Balance(must be called during acquisition)

        CV_CAP_PROP_XI_AUTO_WB                                      = 414, // Automatic white balance

        CV_CAP_PROP_XI_AEAG                                         = 415, // Automatic exposure/gain

        CV_CAP_PROP_XI_EXP_PRIORITY                                 = 416, // Exposure priority (0.5 - exposure 50%, gain 50%).

        CV_CAP_PROP_XI_AE_MAX_LIMIT                                 = 417, // Maximum limit of exposure in AEAG procedure

        CV_CAP_PROP_XI_AG_MAX_LIMIT                                 = 418,  // Maximum limit of gain in AEAG procedure

        CV_CAP_PROP_XI_AEAG_LEVEL                                   = 419, // Average intensity of output signal AEAG should achieve(in %)

        CV_CAP_PROP_XI_TIMEOUT                                      = 420, // Image capture timeout in milliseconds

        CV_CAP_PROP_XI_EXPOSURE                                     = 421, // Exposure time in microseconds

        CV_CAP_PROP_XI_EXPOSURE_BURST_COUNT                         = 422, // Sets the number of times of exposure in one frame.

        CV_CAP_PROP_XI_GAIN_SELECTOR                                = 423, // Gain selector for parameter Gain allows to select different type of gains.

        CV_CAP_PROP_XI_GAIN                                         = 424, // Gain in dB

        CV_CAP_PROP_XI_DOWNSAMPLING_TYPE                            = 426, // Change image downsampling type.

        CV_CAP_PROP_XI_BINNING_SELECTOR                             = 427, // Binning engine selector.

        CV_CAP_PROP_XI_BINNING_VERTICAL                             = 428, // Vertical Binning - number of vertical photo-sensitive cells to combine together.

        CV_CAP_PROP_XI_BINNING_HORIZONTAL                           = 429, // Horizontal Binning - number of horizontal photo-sensitive cells to combine together.

        CV_CAP_PROP_XI_BINNING_PATTERN                              = 430, // Binning pattern type.

        CV_CAP_PROP_XI_DECIMATION_SELECTOR                          = 431, // Decimation engine selector.

        CV_CAP_PROP_XI_DECIMATION_VERTICAL                          = 432, // Vertical Decimation - vertical sub-sampling of the image - reduces the vertical resolution of the image by the specified vertical decimation factor.

        CV_CAP_PROP_XI_DECIMATION_HORIZONTAL                        = 433, // Horizontal Decimation - horizontal sub-sampling of the image - reduces the horizontal resolution of the image by the specified vertical decimation factor.

        CV_CAP_PROP_XI_DECIMATION_PATTERN                           = 434, // Decimation pattern type.

        CV_CAP_PROP_XI_IMAGE_DATA_FORMAT                            = 435, // Output data format.

        CV_CAP_PROP_XI_SHUTTER_TYPE                                 = 436, // Change sensor shutter type(CMOS sensor).

        CV_CAP_PROP_XI_SENSOR_TAPS                                  = 437, // Number of taps

        CV_CAP_PROP_XI_AEAG_ROI_OFFSET_X                            = 439, // Automatic exposure/gain ROI offset X

        CV_CAP_PROP_XI_AEAG_ROI_OFFSET_Y                            = 440, // Automatic exposure/gain ROI offset Y

        CV_CAP_PROP_XI_AEAG_ROI_WIDTH                               = 441, // Automatic exposure/gain ROI Width

        CV_CAP_PROP_XI_AEAG_ROI_HEIGHT                              = 442, // Automatic exposure/gain ROI Height

        CV_CAP_PROP_XI_BPC                                          = 445, // Correction of bad pixels

        CV_CAP_PROP_XI_WB_KR                                        = 448, // White balance red coefficient

        CV_CAP_PROP_XI_WB_KG                                        = 449, // White balance green coefficient

        CV_CAP_PROP_XI_WB_KB                                        = 450, // White balance blue coefficient

        CV_CAP_PROP_XI_WIDTH                                        = 451, // Width of the Image provided by the device (in pixels).

        CV_CAP_PROP_XI_HEIGHT                                       = 452, // Height of the Image provided by the device (in pixels).

        CV_CAP_PROP_XI_LIMIT_BANDWIDTH                              = 459, // Set/get bandwidth(datarate)(in Megabits)

        CV_CAP_PROP_XI_SENSOR_DATA_BIT_DEPTH                        = 460, // Sensor output data bit depth.

        CV_CAP_PROP_XI_OUTPUT_DATA_BIT_DEPTH                        = 461, // Device output data bit depth.

        CV_CAP_PROP_XI_IMAGE_DATA_BIT_DEPTH                         = 462, // bitdepth of data returned by function xiGetImage

        CV_CAP_PROP_XI_OUTPUT_DATA_PACKING                          = 463, // Device output data packing (or grouping) enabled. Packing could be enabled if output_data_bit_depth > 8 and packing capability is available.

        CV_CAP_PROP_XI_OUTPUT_DATA_PACKING_TYPE                     = 464, // Data packing type. Some cameras supports only specific packing type.

        CV_CAP_PROP_XI_IS_COOLED                                    = 465, // Returns 1 for cameras that support cooling.

        CV_CAP_PROP_XI_COOLING                                      = 466, // Start camera cooling.

        CV_CAP_PROP_XI_TARGET_TEMP                                  = 467, // Set sensor target temperature for cooling.

        CV_CAP_PROP_XI_CHIP_TEMP                                    = 468, // Camera sensor temperature

        CV_CAP_PROP_XI_HOUS_TEMP                                    = 469, // Camera housing tepmerature

        CV_CAP_PROP_XI_CMS                                          = 470, // Mode of color management system.

        CV_CAP_PROP_XI_APPLY_CMS                                    = 471, // Enable applying of CMS profiles to xiGetImage (see XI_PRM_INPUT_CMS_PROFILE, XI_PRM_OUTPUT_CMS_PROFILE).

        CV_CAP_PROP_XI_IMAGE_IS_COLOR                               = 474, // Returns 1 for color cameras.

        CV_CAP_PROP_XI_COLOR_FILTER_ARRAY                           = 475, // Returns color filter array type of RAW data.

        CV_CAP_PROP_XI_GAMMAY                                       = 476, // Luminosity gamma

        CV_CAP_PROP_XI_GAMMAC                                       = 477, // Chromaticity gamma

        CV_CAP_PROP_XI_SHARPNESS                                    = 478, // Sharpness Strenght

        CV_CAP_PROP_XI_CC_MATRIX_00                                 = 479, // Color Correction Matrix element [0][0]

        CV_CAP_PROP_XI_CC_MATRIX_01                                 = 480, // Color Correction Matrix element [0][1]

        CV_CAP_PROP_XI_CC_MATRIX_02                                 = 481, // Color Correction Matrix element [0][2]

        CV_CAP_PROP_XI_CC_MATRIX_03                                 = 482, // Color Correction Matrix element [0][3]

        CV_CAP_PROP_XI_CC_MATRIX_10                                 = 483, // Color Correction Matrix element [1][0]

        CV_CAP_PROP_XI_CC_MATRIX_11                                 = 484, // Color Correction Matrix element [1][1]

        CV_CAP_PROP_XI_CC_MATRIX_12                                 = 485, // Color Correction Matrix element [1][2]

        CV_CAP_PROP_XI_CC_MATRIX_13                                 = 486, // Color Correction Matrix element [1][3]

        CV_CAP_PROP_XI_CC_MATRIX_20                                 = 487, // Color Correction Matrix element [2][0]

        CV_CAP_PROP_XI_CC_MATRIX_21                                 = 488, // Color Correction Matrix element [2][1]

        CV_CAP_PROP_XI_CC_MATRIX_22                                 = 489, // Color Correction Matrix element [2][2]

        CV_CAP_PROP_XI_CC_MATRIX_23                                 = 490, // Color Correction Matrix element [2][3]

        CV_CAP_PROP_XI_CC_MATRIX_30                                 = 491, // Color Correction Matrix element [3][0]

        CV_CAP_PROP_XI_CC_MATRIX_31                                 = 492, // Color Correction Matrix element [3][1]

        CV_CAP_PROP_XI_CC_MATRIX_32                                 = 493, // Color Correction Matrix element [3][2]

        CV_CAP_PROP_XI_CC_MATRIX_33                                 = 494, // Color Correction Matrix element [3][3]

        CV_CAP_PROP_XI_DEFAULT_CC_MATRIX                            = 495, // Set default Color Correction Matrix

        CV_CAP_PROP_XI_TRG_SELECTOR                                 = 498, // Selects the type of trigger.

        CV_CAP_PROP_XI_ACQ_FRAME_BURST_COUNT                        = 499, // Sets number of frames acquired by burst. This burst is used only if trigger is set to FrameBurstStart

        CV_CAP_PROP_XI_DEBOUNCE_EN                                  = 507, // Enable/Disable debounce to selected GPI

        CV_CAP_PROP_XI_DEBOUNCE_T0                                  = 508, // Debounce time (x * 10us)

        CV_CAP_PROP_XI_DEBOUNCE_T1                                  = 509, // Debounce time (x * 10us)

        CV_CAP_PROP_XI_DEBOUNCE_POL                                 = 510, // Debounce polarity (pol = 1 t0 - falling edge, t1 - rising edge)

        CV_CAP_PROP_XI_LENS_MODE                                    = 511, // Status of lens control interface. This shall be set to XI_ON before any Lens operations.

        CV_CAP_PROP_XI_LENS_APERTURE_VALUE                          = 512, // Current lens aperture value in stops. Examples: 2.8, 4, 5.6, 8, 11

        CV_CAP_PROP_XI_LENS_FOCUS_MOVEMENT_VALUE                    = 513, // Lens current focus movement value to be used by XI_PRM_LENS_FOCUS_MOVE in motor steps.

        CV_CAP_PROP_XI_LENS_FOCUS_MOVE                              = 514, // Moves lens focus motor by steps set in XI_PRM_LENS_FOCUS_MOVEMENT_VALUE.

        CV_CAP_PROP_XI_LENS_FOCUS_DISTANCE                          = 515, // Lens focus distance in cm.

        CV_CAP_PROP_XI_LENS_FOCAL_LENGTH                            = 516, // Lens focal distance in mm.

        CV_CAP_PROP_XI_LENS_FEATURE_SELECTOR                        = 517, // Selects the current feature which is accessible by XI_PRM_LENS_FEATURE.

        CV_CAP_PROP_XI_LENS_FEATURE                                 = 518, // Allows access to lens feature value currently selected by XI_PRM_LENS_FEATURE_SELECTOR.

        CV_CAP_PROP_XI_DEVICE_MODEL_ID                              = 521, // Return device model id

        CV_CAP_PROP_XI_DEVICE_SN                                    = 522, // Return device serial number

        CV_CAP_PROP_XI_IMAGE_DATA_FORMAT_RGB32_ALPHA                = 529, // The alpha channel of RGB32 output image format.

        CV_CAP_PROP_XI_IMAGE_PAYLOAD_SIZE                           = 530, // Buffer size in bytes sufficient for output image returned by xiGetImage

        CV_CAP_PROP_XI_TRANSPORT_PIXEL_FORMAT                       = 531, // Current format of pixels on transport layer.

        CV_CAP_PROP_XI_SENSOR_CLOCK_FREQ_HZ                         = 532, // Sensor clock frequency in Hz.

        CV_CAP_PROP_XI_SENSOR_CLOCK_FREQ_INDEX                      = 533, // Sensor clock frequency index. Sensor with selected frequencies have possibility to set the frequency only by this index.

        CV_CAP_PROP_XI_SENSOR_OUTPUT_CHANNEL_COUNT                  = 534, // Number of output channels from sensor used for data transfer.

        CV_CAP_PROP_XI_FRAMERATE                                    = 535, // Define framerate in Hz

        CV_CAP_PROP_XI_COUNTER_SELECTOR                             = 536, // Select counter

        CV_CAP_PROP_XI_COUNTER_VALUE                                = 537, // Counter status

        CV_CAP_PROP_XI_ACQ_TIMING_MODE                              = 538, // Type of sensor frames timing.

        CV_CAP_PROP_XI_AVAILABLE_BANDWIDTH                          = 539, // Calculate and return available interface bandwidth(int Megabits)

        CV_CAP_PROP_XI_BUFFER_POLICY                                = 540, // Data move policy

        CV_CAP_PROP_XI_LUT_EN                                       = 541, // Activates LUT.

        CV_CAP_PROP_XI_LUT_INDEX                                    = 542, // Control the index (offset) of the coefficient to access in the LUT.

        CV_CAP_PROP_XI_LUT_VALUE                                    = 543, // Value at entry LUTIndex of the LUT

        CV_CAP_PROP_XI_TRG_DELAY                                    = 544, // Specifies the delay in microseconds (us) to apply after the trigger reception before activating it.

        CV_CAP_PROP_XI_TS_RST_MODE                                  = 545, // Defines how time stamp reset engine will be armed

        CV_CAP_PROP_XI_TS_RST_SOURCE                                = 546, // Defines which source will be used for timestamp reset. Writing this parameter will trigger settings of engine (arming)

        CV_CAP_PROP_XI_IS_DEVICE_EXIST                              = 547, // Returns 1 if camera connected and works properly.

        CV_CAP_PROP_XI_ACQ_BUFFER_SIZE                              = 548, // Acquisition buffer size in buffer_size_unit. Default bytes.

        CV_CAP_PROP_XI_ACQ_BUFFER_SIZE_UNIT                         = 549, // Acquisition buffer size unit in bytes. Default 1. E.g. Value 1024 means that buffer_size is in KiBytes

        CV_CAP_PROP_XI_ACQ_TRANSPORT_BUFFER_SIZE                    = 550, // Acquisition transport buffer size in bytes

        CV_CAP_PROP_XI_BUFFERS_QUEUE_SIZE                           = 551, // Queue of field/frame buffers

        CV_CAP_PROP_XI_ACQ_TRANSPORT_BUFFER_COMMIT                  = 552, // Number of buffers to commit to low level

        CV_CAP_PROP_XI_RECENT_FRAME                                 = 553, // GetImage returns most recent frame

        CV_CAP_PROP_XI_DEVICE_RESET                                 = 554, // Resets the camera to default state.

        CV_CAP_PROP_XI_COLUMN_FPN_CORRECTION                        = 555, // Correction of column FPN

        CV_CAP_PROP_XI_SENSOR_MODE                                  = 558, // Current sensor mode. Allows to select sensor mode by one integer. Setting of this parameter affects: image dimensions and downsampling.

        CV_CAP_PROP_XI_HDR                                          = 559, // Enable High Dynamic Range feature.

        CV_CAP_PROP_XI_HDR_KNEEPOINT_COUNT                          = 560, // The number of kneepoints in the PWLR.

        CV_CAP_PROP_XI_HDR_T1                                       = 561, // position of first kneepoint(in % of XI_PRM_EXPOSURE)

        CV_CAP_PROP_XI_HDR_T2                                       = 562, // position of second kneepoint (in % of XI_PRM_EXPOSURE)

        CV_CAP_PROP_XI_KNEEPOINT1                                   = 563, // value of first kneepoint (% of sensor saturation)

        CV_CAP_PROP_XI_KNEEPOINT2                                   = 564, // value of second kneepoint (% of sensor saturation)

        CV_CAP_PROP_XI_IMAGE_BLACK_LEVEL                            = 565, // Last image black level counts. Can be used for Offline processing to recall it.

        CV_CAP_PROP_XI_HW_REVISION                                  = 571, // Returns hardware revision number.

        CV_CAP_PROP_XI_DEBUG_LEVEL                                  = 572, // Set debug level

        CV_CAP_PROP_XI_AUTO_BANDWIDTH_CALCULATION                   = 573, // Automatic bandwidth calculation,

        CV_CAP_PROP_XI_FREE_FFS_SIZE                                = 581, // Size of free camera FFS.

        CV_CAP_PROP_XI_USED_FFS_SIZE                                = 582, // Size of used camera FFS.

        CV_CAP_PROP_XI_FFS_ACCESS_KEY                               = 583, // Setting of key enables file operations on some cameras.

        CV_CAP_PROP_XI_SENSOR_FEATURE_SELECTOR                      = 585, // Selects the current feature which is accessible by XI_PRM_SENSOR_FEATURE_VALUE.

        CV_CAP_PROP_XI_SENSOR_FEATURE_VALUE                         = 586, // Allows access to sensor feature value currently selected by XI_PRM_SENSOR_FEATURE_SELECTOR.

     

        // Properties for Android cameras

        CV_CAP_PROP_ANDROID_FLASH_MODE = 8001,

        CV_CAP_PROP_ANDROID_FOCUS_MODE = 8002,

        CV_CAP_PROP_ANDROID_WHITE_BALANCE = 8003,

        CV_CAP_PROP_ANDROID_ANTIBANDING = 8004,

        CV_CAP_PROP_ANDROID_FOCAL_LENGTH = 8005,

        CV_CAP_PROP_ANDROID_FOCUS_DISTANCE_NEAR = 8006,

        CV_CAP_PROP_ANDROID_FOCUS_DISTANCE_OPTIMAL = 8007,

        CV_CAP_PROP_ANDROID_FOCUS_DISTANCE_FAR = 8008,

        CV_CAP_PROP_ANDROID_EXPOSE_LOCK = 8009,

        CV_CAP_PROP_ANDROID_WHITEBALANCE_LOCK = 8010,

     

        // Properties of cameras available through AVFOUNDATION interface

        CV_CAP_PROP_IOS_DEVICE_FOCUS = 9001,

        CV_CAP_PROP_IOS_DEVICE_EXPOSURE = 9002,

        CV_CAP_PROP_IOS_DEVICE_FLASH = 9003,

        CV_CAP_PROP_IOS_DEVICE_WHITEBALANCE = 9004,

        CV_CAP_PROP_IOS_DEVICE_TORCH = 9005,

     

        // Properties of cameras available through Smartek Giganetix Ethernet Vision interface

        /* --- Vladimir Litvinenko (litvinenko.vladimir@gmail.com) --- */

        CV_CAP_PROP_GIGA_FRAME_OFFSET_X = 10001,

        CV_CAP_PROP_GIGA_FRAME_OFFSET_Y = 10002,

        CV_CAP_PROP_GIGA_FRAME_WIDTH_MAX = 10003,

        CV_CAP_PROP_GIGA_FRAME_HEIGH_MAX = 10004,

        CV_CAP_PROP_GIGA_FRAME_SENS_WIDTH = 10005,

        CV_CAP_PROP_GIGA_FRAME_SENS_HEIGH = 10006,

     

        CV_CAP_PROP_INTELPERC_PROFILE_COUNT               = 11001,

        CV_CAP_PROP_INTELPERC_PROFILE_IDX                 = 11002,

        CV_CAP_PROP_INTELPERC_DEPTH_LOW_CONFIDENCE_VALUE  = 11003,

        CV_CAP_PROP_INTELPERC_DEPTH_SATURATION_VALUE      = 11004,

        CV_CAP_PROP_INTELPERC_DEPTH_CONFIDENCE_THRESHOLD  = 11005,

        CV_CAP_PROP_INTELPERC_DEPTH_FOCAL_LENGTH_HORZ     = 11006,

        CV_CAP_PROP_INTELPERC_DEPTH_FOCAL_LENGTH_VERT     = 11007,

     

        // Intel PerC streams

        CV_CAP_INTELPERC_DEPTH_GENERATOR = 1 << 29,

        CV_CAP_INTELPERC_IMAGE_GENERATOR = 1 << 28,

        CV_CAP_INTELPERC_GENERATORS_MASK = CV_CAP_INTELPERC_DEPTH_GENERATOR + CV_CAP_INTELPERC_IMAGE_GENERATOR

     

     

    写视频

    //保存视频文件

    /* initialize video file writer */

    CVAPI(CvVideoWriter*) cvCreateVideoWriter( const char* filename, //文件名

    int fourcc,

                                               double fps,

    CvSize frame_size,

                                               int is_color CV_DEFAULT(1));

    //写入每一帧

    /* write frame to video file */

    CVAPI(int) cvWriteFrame( CvVideoWriter* writer, //视频写入结构

    const IplImage* image );//图像IplImage*

     

     

    //释放空间和结构

    /* close video file writer */

    CVAPI(void) cvReleaseVideoWriter( CvVideoWriter** writer );

     

    示例代码如下:

    #include <opencv2opencv.hpp>

    using namespace cv;

    using namespace std;

    //视频操作

    int main(int argc,char** argv) {

    //读取视频文件

    //cvCreateFileCapture

    VideoCapture cap(0);

    namedWindow("video");

    if (!cap.isOpened())

    {

    return -1;

    }

    while (waitKey(1)!='q'&&cap.isOpened())

    {

    Mat frame;

    cap >> frame;

    if (frame.empty()) {

    cout << "Video over" << endl;

    }

    imshow("video", frame);

    }

    return 0;

    }

     

     

    5 converImage函数

    //不同图像格式之间转换

    /* utility function: convert one image to another with optional vertical flip */

    CVAPI(void) cvConvertImage( const CvArr* src, //源图像 (8位单通道 或是3个通道)

    CvArr* dst,//

     int flags CV_DEFAULT(0));//可以垂直反转图像

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  • 原文地址:https://www.cnblogs.com/retacn-yue/p/6194174.html
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