uEye Camera and OpenCV Memory Access - c

Question

I am using a 35MM EO Megapixel Fixed FL Lens Edmund Optics camera, OpenCV 2.4.6, and Ubuntu 12.04 LTS as my development environment. I am also using C to develop, not C++. The camera has an API that I am following, and I believe I have set everything up correctly. I initialize the camera, set memory locations, and freeze the video. I then use OpenCV to get the image from memory, but my image is nothing like what it should be (may be seen below). Is my image data pulling data from a junk memory location? How can I access the image saved by "is_FreezeVideo" for image processing done by OpenCV? The image that is printed out can be seen here http://i.imgur.com/kW6aqB3.png
The code I am using is below.
#include "../Include/Camera.h"
#include <wchar.h>
#include <locale.h>
#include <stdlib.h>
#include <stdio.h>
#include <cv.h>
#include <highgui.h>
//#include <opencv2/opencv.hpp>
#include <ueye.h>
// uEye variables
HIDS m_hCam; // handle to room
HWND m_hWndDisplay; // handle to diplay window
int m_Ret; // return value of uEye SDK functions
int m_nColorMode = 0; // Y8/RGB16/RGB24/REG32
int m_nBitsPerPixel=8; // number of bits needed store one pixel
int m_nSizeX = 1280; // width of video
int m_nSizeY = 1024; // height of video
int m_lMemoryId; // grabber memory - buffer ID
char* m_pcImageMemory; // grabber memory - pointer to buffer
int m_nRenderMode = IS_RENDER_FIT_TO_WINDOW; //render mode
void getAzimuth(){
}
void getElevation(){
}
void initializeCamera(){
if (m_hCam !=0 ) {
//free old image mem.
is_FreeImageMem (m_hCam, m_pcImageMemory, m_lMemoryId);
is_ExitCamera (m_hCam);
}
// init room
m_hCam = (HIDS) 0; // open next room
m_Ret = is_InitCamera (&m_hCam, NULL); // init room
if (m_Ret == IS_SUCCESS) {
// retrieve original image size
SENSORINFO sInfo;
is_GetSensorInfo (m_hCam, &sInfo);
m_nSizeX = sInfo.nMaxWidth;
m_nSizeY = sInfo.nMaxHeight;
printf("Width: %d Height: ", m_nSizeX, m_nSizeY);
// setup the color depth to the current windows setting
is_GetColorDepth (m_hCam, &m_nBitsPerPixel, &m_nColorMode);
is_SetColorMode (m_hCam, m_nColorMode);
//printf ("m_nBitsPerPixel=%i m_nColorMode=%i \n", m_nBitsPerPixel, IS_CM_BAYER_RG8);
// memory initialization
is_AllocImageMem (m_hCam, m_nSizeX, m_nSizeY, m_nBitsPerPixel, &m_pcImageMemory, &m_lMemoryId);
//set memory active
is_SetImageMem (m_hCam, m_pcImageMemory, m_lMemoryId);
// display initialization
is_SetImageSize (m_hCam, m_nSizeX, m_nSizeY);
is_SetImagePos(m_hCam, 0, 0);
is_SetDisplayMode (m_hCam, IS_SET_DM_DIB);
} else {
printf("No Camera Initialized! %c", 10);
}
if (m_hCam !=0) {
INT dummy;
char *pMem, *pLast;
double fps = 0.0;
if (is_FreezeVideo (m_hCam, IS_WAIT) == IS_SUCCESS) {
m_Ret = is_GetActiveImageMem(m_hCam, &pLast, &dummy);
m_Ret = is_GetImageMem(m_hCam, (void**)&pLast);
}
IplImage* tmpImg = cvCreateImageHeader (cvSize (m_nSizeX, m_nSizeY), IPL_DEPTH_8U, 1);
tmpImg->imageData = &m_pcImageMemory;
cvNamedWindow("src",1);
cvShowImage("src",tmpImg);
cvWaitKey(0);
}
}
Thanks

Answer 1

You need to use is_ImageFile function to save the image file to a filename.You can see the sample example from the is_ImageFile function.You can save it to the format(bmp,png,jpeg) you need.
regards,
Sreenivas

Answer 2

The problem was the camera properties. After setting brightness and other properties, we now get an actual image