Baumer工业相机堡盟工业相机如何使用BGAPISDK和OpenCV设置图像进行比例显示（C++）

#include <stdio.h>
#include <iostream>
#include <iomanip>
#include <set>
#include <vector>
#include <algorithm>
#include <string>
#include "bgapi2_genicam/bgapi2_genicam.hpp"
#include <string>
#include <sstream>
#include <fstream>
#include <iostream>
#include <iomanip>
// OpenCV includes
#include <cv.h>
#include <highgui.h>

SystemList 
Open a System 
Get the InterfaceList and fill it Open an Interface 
// OpenCV -> display scaled down image in MONO8 (width<800 1:1, 800<width<1500 1:2, width>1500 1:4)
// 4.1.9 Prepare the Camera Object for Image Handling
void BGAPI_CALLBACK imageCallback(void * callBackOwner, BGAPI::Image * pImage)
{
  BGAPI_RESULT res = BGAPI_RESULT_OK;
  unsigned char* imagebuffer = NULL;
  BGAPI_ImageHeader header;
  int width = 0;
  int height = 0;
  int transformbufferLen = 0;
  unsigned char* transformbuffer = NULL;
  int swc = 0;
  int hwc = 0;
  int timehigh;  //varaible for timestamp
  int timelow;   //variable for timestamp
  float timediff; //variable for frame rate
  float framerate; //variable for frame rate
  res = pImage->getNumber( &swc, &hwc );
  if( res != BGAPI_RESULT_OK )
  {
  printf("BGAPI::Image::getNumber Errorcode: %d", res);
  }
  res = pImage->getTimeStamp( &timehigh, &timelow ); //get timestamp
  if( res != BGAPI_RESULT_OK )
  {
  printf("BGAPI::Image::getTimeStamp Errorcode: %d", res);
  }
  timediff = timelow - timeold;    // calculate timestamp difference to last image
  timeold = timelow;     // remember timelow for next image framerate calculation
  timediff = timediff*32,0;        // convert ticks to nsec (1 tick is 32 nsec, see TDS of the camera)
  framerate = 1000000000/timediff; //calculate framerate
  res = pImage->get( &imagebuffer );
  if( res != BGAPI_RESULT_OK )
  {
  printf( "pImage->get failed with %d\n", res );
  return;
  }
  else
  {
  res = pImage->getSize(&width, &height);
  if( res != BGAPI_RESULT_OK )
  {
    printf("BGAPI::Image::getSize Errorcode: %d", res);
  }
  //create two images (full image and scaled image)
  IplImage* im = 0;   // full image
  IplImage* tmpsize = 0;     //scaled image
  //copy image of camera to an opencv image
  im = cvCreateImage(cvSize(width,height),IPL_DEPTH_8U, 3); // color 8 bit * 3
  im->imageData = (char *)imagebuffer;
  //scale image if width > 800 pixels
  if(width > 800 && width < 1500)
  {
    CvSize size = cvSize(width/2,height/2);
    tmpsize=cvCreateImage(size,IPL_DEPTH_8U, 3);
    cvResize(im,tmpsize,CV_INTER_LINEAR);
  }
  else if (width > 1500)
  {
    CvSize size = cvSize(width/4,height/4);
    tmpsize=cvCreateImage(size,IPL_DEPTH_8U, 3);
    cvResize(im,tmpsize,CV_INTER_LINEAR);
  }
  else
  {
    CvSize size = cvSize(width,height);
    tmpsize=cvCreateImage(size,IPL_DEPTH_8U, 3);
    cvResize(im,tmpsize,CV_INTER_LINEAR);
  }
  //create display window for camera live image
  cvNamedWindow("Live", 1);
  //display live image with opencv
  //cvShowImage( "Live", im );  // full size
  cvShowImage( "Live", tmpsize ); // scaled down size
  //release opencv images
  cvReleaseImage(&tmpsize);
  cvReleaseImage( &im);
  cvWaitKey(1); //?
  res = ((BGAPI::Camera*)callBackOwner)->setImage( pImage );
  if( res != BGAPI_RESULT_OK )
  {
    printf( "\nsetImage failed with %d\n", res );
  }
  printf("Image number %d. Frame Rate: %.2f \r", swc, framerate);
  fflush( stdout );
  return;
  }
}