void CMainFrame::SetExposureTime(int nWindWidth,long lTintUpper,long lTintLower)
{
int size = sizeof(HVTYPE);
HVTYPE type;
HVGetDeviceInfo(m_hhv,DESC_DEVICE_TYPE, &type, &size);
//When outputwindow changes, change the exposure
//请参考曝光系数转换公式
long lClockFreq = 24000000;
int nOutputWid = nWindWidth;
double dExposure = 0.0;
double dTint = max((double)lTintUpper/(double)lTintLower,MY_ZERO);
if(type == MV1300UCTYPE || type == MV1301UCTYPE)
{
long lTb = 0;
dExposure = (dTint* lClockFreq + 180.0)/((double)nOutputWid + 244.0 + lTb);
}
else
{
long lTb = 0;
dExposure = (dTint* lClockFreq + 180.0)/((double)nOutputWid + 305.0 + lTb) + 1 ;
}
if (dExposure > 16383)
dExposure = 16383;
HVAECControl(m_hhv, AEC_EXPOSURE_TIME, (long)dExposure);
}
/**************************************************************************
函数:
SetExposureTime
输入参数:
int nWindWidth 当前图像宽度
int lTintUpper 曝光时间的分子，shutter的取值
int lTintLower 曝光时间的分母，与shutter的单位相关
（ms:1000；s:1）
输出参数:
无
说明:
设置曝光时间（其他的参数如摄像机时钟频率，消隐值都取默认值）
***************************************************************************/
HVSTATUS HV_Camera::SetExposureTime(int nWindWidth,
long lTintUpper,
long lTintLower,
long HBlanking,
HV_SNAP_SPEED SnapSpeed,
HV_RESOLUTION Resolution)
{
HVTYPE type = UNKNOWN_TYPE;
int size = sizeof(HVTYPE);
HVGetDeviceInfo(m_hhv,DESC_DEVICE_TYPE, &type, &size);
int nOutputWid = nWindWidth;
double dExposure = 0.0;
double dTint = max((double)lTintUpper/(double)lTintLower,MY_ZERO);
double lClockFreq = 0.0;
if (IS_USB_GV400(type))
{
long lTb = HBlanking;
lTb += 0x5e;
lClockFreq = (SnapSpeed == HIGH_SPEED)? 26600000.0:13300000.0;
long rate = 0;
switch(Resolution)
{
case RES_MODE0:
rate = 1;
break;
case RES_MODE1:
rate = 2;
break;
default:
return STATUS_PARAMETER_OUT_OF_BOUND;
}
nOutputWid = nOutputWid * rate; //width*rate
if ((dTint * lClockFreq) <= (nOutputWid+ lTb - 255))
{
dExposure = 1;
}
else
dExposure = ((dTint * lClockFreq) - (nOutputWid + lTb - 255) ) / (nOutputWid + lTb);
if (dExposure < 3)
dExposure = 3;
else if (dExposure > 32766)
dExposure = 32766;
}
else if( IS_USB_HV300(type))
{
lClockFreq = (SnapSpeed == HIGH_SPEED)? 24000000:12000000;
long lTb = HBlanking;
lTb += 142;
if(lTb<21)
lTb = 21;
long lP1 = 331, lP2 = 38;
long lp4 = 316;
if(Resolution == RES_MODE1)
{
lP1 = 673;
lP2 = 22;
lp4 = 316*2;
}
long lAQ = (long)(nOutputWid + lP1 + lP2 + lTb);
long lTrow = max(lAQ,(lP1+lp4));
dExposure = ((dTint* lClockFreq)+ lP1 - 132.0)/lTrow;
if((dExposure-(int)dExposure) >0.5)
dExposure += 1.0;
if(dExposure <= 0)
dExposure = 1;
else if(dExposure > 1048575)
dExposure = 1048575;
}
else if(IS_USB_HV200(type))
{
lClockFreq = (SnapSpeed == HIGH_SPEED)? 24000000:12000000;
long lTb = HBlanking;
lTb += 53;
if(lTb<19)
lTb = 19;
long lAQ = (long)(nOutputWid + 305.0 + lTb);
long lTrow = max(617,lAQ);
dExposure = (dTint* lClockFreq + 180.0)/lTrow + 1;
if((dExposure-(int)dExposure) >0.5)//四舍五入
dExposure += 1.0;
if(dExposure <= 0)
dExposure = 1;
else if(dExposure > 16383)
dExposure = 16383;
}
else if(IS_USB_HV5051(type))
{
SHUTTER_UNIT_VALUE nUnit = SHUTTER_MS;
HVSTATUS status = STATUS_OK;
if (lTintLower == 1000000)
{
nUnit = SHUTTER_US;
}
//设置曝光时间单位
status = HVAECControl(m_hhv, AEC_SHUTTER_UNIT, nUnit);
if (!HV_SUCCESS(status))
{
return status;
}
//设置曝光时间。
return HVAECControl(m_hhv, AEC_SHUTTER_SPEED, lTintUpper);
}
else
{
lClockFreq = (SnapSpeed == HIGH_SPEED)? 24000000:12000000;
long lTb = HBlanking;
lTb += 9;
lTb -= 19;
if(lTb <= 0) lTb =0;
if(((double)nOutputWid + 244.0 + lTb ) > 552)
dExposure = (dTint* lClockFreq + 180.0)/((double)nOutputWid + 244.0 + lTb);
else
dExposure = ((dTint * lClockFreq)+ 180.0) / 552 ;
if((dExposure-(int)dExposure) >0.5)
dExposure += 1.0;
if(dExposure <= 0)
dExposure = 1;
else if(dExposure > 16383)
dExposure = 16383;
}
return HVAECControl(m_hhv, AEC_EXPOSURE_TIME, (long)dExposure);
}
