How can I conduct image processing using 'LLGrabDlg.cpp' ?

[Superstar~!]

Hello,

I want to do image processing with LLGrabDlg.cpp in the following folder.
(c:\Users\Public\Documents\National Instruments\NI-IMAQdx\Examples\MSVC\Low-Level Grab\LLGrabDlg.cpp).

Without labview, I succeeeded to conduct image processing using 'hlgrab.c' several years ago.

For example, threshold algorithm can be expressed as follows:

for (j=0:j<rows;j++){
for (i=0:i<cols;i++){
if (ImaqBuffer[j*640+i] >= threshold){
ImaqBuffer[j*640+i]=255;
if (ImaqBuffer[j*640+i] < threshold){
ImaqBuffer[j*640+i]=0;
}
}

Recently I grabbed the images using Digital type 8233 framegrabber and GigE camera.

And I found the following sentences in niimaqdx.h.
==> typedef struct Image_struct Image;

And I also found the following sentences in LLGrabDlg.h.
Image* image;

However, it is very hard to find out the exact type of image_struct, so I cannot conduct image processing with 8233 framegrabber.

How can I convert image pointer to conduct image processing?

Is there anyone to help me? It is very important for me.

[BlueCheese]

The Image struct is intentionally left opaque in the Vision library since its implementation is subject to change. If you look at "nivision.h" you'll see the following useful function:

typedef struct ImageInfo_struct {
    CalibrationUnit imageUnit; //If you set calibration information with imaqSetSimpleCalibrationInfo(), imageUnit is the calibration unit.
    float stepX; //If you set calibration information with imaqSetCalibrationInfo(), stepX is the distance in the calibration unit between two pixels in the x direction.
    float stepY; //If you set calibration information with imaqSetCalibrationInfo(), stepY is the distance in the calibration unit between two pixels in the y direction.
    ImageType imageType; //The type of the image.
    int xRes; //The number of columns in the image.
    int yRes; //The number of rows in the image.
    int xOffset; //If you set mask offset information with imaqSetMaskOffset(), xOffset is the offset of the     mask origin in the x direction.
    int yOffset; //If you set mask offset information with imaqSetMaskOffset(), yOffset is the offset of the     mask origin in the y direction.
    int border; //The number of border pixels around the image.
    int pixelsPerLine; //The number of pixels stored for each line of the image.
    void* reserved0; //This element is reserved.
    void* reserved1; //This element is reserved.
    void* imageStart; //A pointer to pixel (0,0).
} ImageInfo;

IMAQ_FUNC int    IMAQ_STDCALL imaqGetImageInfo(const Image* image, ImageInfo* info);