// registered to receive frames where motion was detected from the previous frame
void OnRxNewMotionWasDetectedFrame(FRAME frame)
{
bool sucess = m_LPRProcessQ.Enqueue(frame); // enqueue for the LPR thread to process
if (!sucess)
m_AppData.HealthStatistics[(int)APPLICATION_DATA.HEALTH_STATISTICS.LPR.LPR_DroppedFrames].HitMe++;
if (m_LPRProcessQ.Count > m_LPRProcessQueSize / 2) m_AppData.LPRGettingBehind = true;
else m_AppData.LPRGettingBehind = false;
// store the frame meta data for later retrival if the LPR finds plates
// no need to use memory storing bitmaps and jpegs as the jpeg has been stored on disk by the DVR and the
// frame meta data includes a reference to this file.
FRAME newFrame = null;
newFrame = frame.Clone(false, false, false);
newFrame.PlateNativeLanguage = "LATIN";
// keep knowledge of this frame around for a while, so that if LPR plate number group processig finds some numbers,
// we can look up which frame was associated with those numbers by serial number.
// the jpeg already went to disk by the time the LPR found numbers, so only the file url gets recorded
// into the eventlog.txt file
m_StoredFrameData.Add(newFrame.SerialNumber, newFrame);
// for plate groupings, keep the serialnumber/frame data around for a while, only use
//if (m_AppData.DVRMode == APPLICATION_DATA.DVR_MODE.STORE_ON_MOTION)
//{
// newFrame = frame.Clone(false, false, false);
// newFrame.PlateNativeLanguage = "LATIN";
// // keep knowledge of this frame around for a while, so that if LPR plate number group processig finds some numbers,
// // we can look up which frame was associated with those numbers by serial number.
// // the jpeg already went to disk by the time the LPR found numbers, so only the file url gets recorded
// // into the eventlog.txt file
// m_StoredFrameData.Add(newFrame.SerialNumber, newFrame);
//}
//else
//{
// //else m_AppData.DVRMode == APPLICATION_DATA.DVR_MODE.STORE_ON_PLATE_FOUND
// // keep a copy of the jpeg in this frame since this frame is what the DVR will write to disk
// newFrame = frame.Clone(false,true,false);
//}
}
void LPRProcessImage(FRAME frame)
{
try
{
m_AppData.HealthStatistics[(int)APPLICATION_DATA.HEALTH_STATISTICS.LPR.LPR_FramesProcessed].HitMe++;
int error = 0;
int plateCount = 0;
int diagEnabled = 0;
if (m_AppData.LPRDiagEnabled) diagEnabled = 1;
try
{
plateCount = m_LPRFuntions.ReadThisImage(frame.Luminance, diagEnabled, ref m_processOptions, ref error);
if (error != 0)
{
m_Log.Log("LPR Error = " + error.ToString(), ErrorLog.LOG_TYPE.FATAL);
}
}
catch (Exception ex)
{
m_Log.Log("ReadThisImage ex: " + ex.Message, ErrorLog.LOG_TYPE.FATAL);
}
// did we find any plates int the image ?
if (plateCount < 1)
{
m_LPRFuntions.PlateGroups_ProcessNewImage(frame.SourceChannel, " ", 0, frame.SerialNumber);// notify next frame had no plates
frame = null;
return;
}
m_AppData.HealthStatistics[(int)APPLICATION_DATA.HEALTH_STATISTICS.LPR.LPR_PlatesFound].HitMe = plateCount;
// extract the plate images and strings, and send to the LPRStorage class
string[] detectedStrings = new string[plateCount];
for (int p = 0; p < plateCount; p++)
{
float score = 0;
// get the string from the plate
detectedStrings[p] = m_LPRFuntions.GetPlateString(p, ref score);
m_AppData.HealthStatistics[(int)APPLICATION_DATA.HEALTH_STATISTICS.LPR.LPR_LastReading].StatString.SetValue = (string) detectedStrings[p];
if (m_AppData.DVRMode == APPLICATION_DATA.DVR_MODE.STORE_ON_MOTION)
{
// in store-on-motion mode, consolidate multiple frames of detected plates into a single grouping of plate readings...
m_LPRFuntions.PlateGroups_ProcessNewImage(frame.SourceChannel, detectedStrings[p], detectedStrings[p].Length, frame.SerialNumber);
} // else, we are in the mode of store on LPR detecting a plate number. In this case, we are going to store all results below...
}// end for each plate found
// send unfiltered plate result to consumers
FRAME justToXferPlateNumber = frame.Clone(false, false, false);
justToXferPlateNumber.PlateNumberNativeLanguage = detectedStrings;
justToXferPlateNumber.PlateNumberLatin = detectedStrings;
m_LPRPerFrameReadingQ.Enqueue(justToXferPlateNumber);
if (plateCount > 0 && m_AppData.DVRMode == APPLICATION_DATA.DVR_MODE.STORE_ON_PLATE_FOUND)
{
// in store on plate found, store all plate readings/images on a per frame basis, no groupings.. will be redundant from image to image
frame.PlateNumberNativeLanguage = detectedStrings; // this contains a multiple reading from multiple plates in one image
frame.PlateNumberLatin = detectedStrings;
m_LPRFinalPlateGroupOutputQ.Enqueue(frame);
}
}
catch (Exception ex)
{
m_Log.Log("LPRProcessImage ex : " + ex.Message, ErrorLog.LOG_TYPE.FATAL);
}
}
