void CBarRecog::BinaryImage(BYTE threhold)
        {
            //未裝載圖像時不進行任何操作
            if(ImageArray == NULL)
                return;
            int i, j;
            for(i=0; i<ImageHeight; i++)
            {
                for(j=0; j<ImageWidth; j++)
                {
                    if(ImageArray[i][j] >= threhold)
                        ImageArray[i][j] = (BYTE)0;
                    else
                        ImageArray[i][j] = (BYTE)1;
                }
            }
        }