在BC里，有这样一段抓拍的函数，请教怎么判断这个图象是否清楚与模糊

在BC里，有这样一段抓拍的函数，请问如何判断这个图象是否清楚与模糊？
在BC里，用得是OK图象采集卡。有这样一个函数：
void   TForm1::zhuapaidx(int   fangxiang)
{
    if(hBoard)   {
                                  //get   current   vga   mode
lRGBForm=LOWORD(okSetCaptureParam(hBoard,   CAPTURE_SCRRGBFORMAT,   -1));


//set   target   buffer   format   to   same   as   current   vga
okSetVideoParam(   hBoard,   VIDEO_SOURCECHAN,   fangxiang);
okSetCaptureParam(hBoard,CAPTURE_BUFRGBFORMAT,   lRGBForm);

//-----2   capture   to   BUFFER
rcBuffer.left=rcBuffer.top=0;
rcBuffer.right=498;
rcBuffer.bottom=565;
//set   target(here   is   buffer)   rect

okSetTargetRect(hBoard,   BUFFER,   &rcBuffer);

//set   to   not   waiting   end,   return   immediately
okSetCaptureParam(hBoard,   CAPTURE_SEQCAPWAIT,   0);
num=okGetBufferSize(hBoard,NULL,NULL);//
//you   can   here   set   your   callback   functions   if   necessary
//okSetSeqCallback(hBoard,BeginCapture,BackDisplay,
//EndCapture);

okCaptureTo(hBoard,BUFFER,0,num);//               sequence   capture   to   frame   buffer

//way   1.
//while(   okGetCaptureStatus(hBoard,0)   )   {
// SleepEx(5,TRUE);   //best   do   sleep   when   loop   waitting
//}
//way   2.
okGetCaptureStatus(hBoard,1);

okSaveImageFile(   hBoard,   "11.bmp ",   0,   BUFFER,   0,   1);
//okSaveImageFile(   hBoard,   "13.bmp ",   0,   BUFFER,   0,   1);
//close   specified   board
//okCloseBoard(hBoard);


//化出坐标线
//抓拍的图像
Graphics::TBitmap*   Expro=new   Graphics::TBitmap;  
Expro-> Height=   565;
Expro-> Width=   498;

Expro-> LoadFromFile( "11.bmp ");

Expro-> Canvas-> Pen-> Color=clRed;
Expro-> Canvas-> Pen-> Width=5;

//第一个方格线
Expro-> Canvas-> MoveTo(Aread1.ep1.x,Aread1.ep1.y);
Expro-> Canvas-> LineTo(Aread1.ep2.x,Aread1.ep2.y);
Expro-> Canvas-> LineTo(Aread1.sp2.x,Aread1.sp2.y);
Expro-> Canvas-> LineTo(Aread1.sp1.x,Aread1.sp1.y);
Expro-> Canvas-> LineTo(Aread1.ep1.x,Aread1.ep1.y);
//第二个方格线
Expro-> Canvas-> MoveTo(Aread2.ep1.x,Aread2.ep1.y);
Expro-> Canvas-> LineTo(Aread2.ep2.x,Aread2.ep2.y);
Expro-> Canvas-> LineTo(Aread2.sp2.x,Aread2.sp2.y);
Expro-> Canvas-> LineTo(Aread2.sp1.x,Aread2.sp1.y);
Expro-> Canvas-> LineTo(Aread2.ep1.x,Aread2.ep1.y);

//第三个方格线
Expro-> Canvas-> MoveTo(Aread3.ep1.x,Aread3.ep1.y);
Expro-> Canvas-> LineTo(Aread3.ep2.x,Aread3.ep2.y);
Expro-> Canvas-> LineTo(Aread3.sp2.x,Aread3.sp2.y);
Expro-> Canvas-> LineTo(Aread3.sp1.x,Aread3.sp1.y);
Expro-> Canvas-> LineTo(Aread3.ep1.x,Aread3.ep1.y);


Image4-> Canvas-> Draw(0,0,Expro);

delete   Expro;
}
CCD由于出现大雾和浓雾拍摄到的图象会模糊，请问如何来判断该图象是否模糊的？

------解决方案--------------------
是否可以通过如16*16矩阵的像素间色差值做判断如差值大就为清晰，小就为模糊。
并且可通过已有数据计算出模糊的的图象颜色间差值范围。