Cleaned up API. No longer backwards compatible

src/daemon.cpp

@@ -250,8 +250,11 @@ void streamRecognitionThread(void* arg)
       
       timespec startTime;
       getTime(&startTime);
-      cv::imencode(".bmp", latestFrame, buffer );
-      std::vector<AlprResult> results = alpr.recognize(buffer);
+      
+      std::vector<AlprRegionOfInterest> regionsOfInterest;
+      regionsOfInterest.push_back(AlprRegionOfInterest(0,0, latestFrame.cols, latestFrame.rows));
+
+      AlprResults results = alpr.recognize(latestFrame.data, latestFrame.elemSize(), latestFrame.cols, latestFrame.rows, regionsOfInterest);
       
       timespec endTime;
       getTime(&endTime);
@@ -262,7 +265,7 @@ void streamRecognitionThread(void* arg)
 	LOG4CPLUS_INFO(logger, "Camera " << tdata->camera_id << " processed frame in: " << totalProcessingTime << " ms.");
       }
       
-      if (results.size() > 0)
+      if (results.plates.size() > 0)
       {
         long epoch_time = getEpochTime();
         
@@ -280,7 +283,7 @@ void streamRecognitionThread(void* arg)
 	
 	// Update the JSON content to include UUID and camera ID
   
-	std::string json = alpr.toJson(results, totalProcessingTime, epoch_time);
+	std::string json = alpr.toJson(results);
 	
 	cJSON *root = cJSON_Parse(json.c_str());
 	cJSON_AddStringToObject(root,	"uuid",		uuid.str().c_str());
@@ -298,9 +301,9 @@ void streamRecognitionThread(void* arg)
 	free(out);
 	
 	// Push the results to the Beanstalk queue
-	for (int j = 0; j < results.size(); j++)
+	for (int j = 0; j < results.plates.size(); j++)
 	{
-	  LOG4CPLUS_DEBUG(logger, "Writing plate " << results[j].bestPlate.characters << " (" <<  uuid << ") to queue.");
+	  LOG4CPLUS_DEBUG(logger, "Writing plate " << results.plates[j].bestPlate.characters << " (" <<  uuid << ") to queue.");
 	}
 	
 	writeToQueue(response);

src/main.cpp

@@ -37,7 +37,7 @@ const std::string MAIN_WINDOW_NAME = "ALPR main window";
 
 const bool SAVE_LAST_VIDEO_STILL = false;
 const std::string LAST_VIDEO_STILL_LOCATION = "/tmp/laststill.jpg";
-std::string getJson(Alpr* alpr, std::vector<AlprResult> results);
+
 
 /** Function Headers */
 bool detectandshow(Alpr* alpr, cv::Mat frame, std::string region, bool writeJson);
@@ -272,14 +272,15 @@ int main( int argc, const char** argv )
 
 bool detectandshow( Alpr* alpr, cv::Mat frame, std::string region, bool writeJson)
 {
-  std::vector<uchar> buffer;
-  cv::imencode(".bmp", frame, buffer );
 
   timespec startTime;
   getTime(&startTime);
-
-  std::vector<AlprResult> results = alpr->recognize(buffer);
-
+  
+  std::vector<AlprRegionOfInterest> regionsOfInterest;
+  regionsOfInterest.push_back(AlprRegionOfInterest(0,0, frame.cols, frame.rows));
+  
+  AlprResults results = alpr->recognize(frame.data, frame.elemSize(), frame.cols, frame.rows, regionsOfInterest );
+  
   timespec endTime;
   getTime(&endTime);
   double totalProcessingTime = diffclock(startTime, endTime);
@@ -289,27 +290,27 @@ bool detectandshow( Alpr* alpr, cv::Mat frame, std::string region, bool writeJso
   
   if (writeJson)
   {
-    std::cout << alpr->toJson(results, totalProcessingTime) << std::endl;
+    std::cout << alpr->toJson( results ) << std::endl;
   }
   else
   {
-    for (int i = 0; i < results.size(); i++)
+    for (int i = 0; i < results.plates.size(); i++)
     {
-      std::cout << "plate" << i << ": " << results[i].result_count << " results";
+      std::cout << "plate" << i << ": " << results.plates[i].result_count << " results";
 	  if (measureProcessingTime)
-		std::cout << " -- Processing Time = " << results[i].processing_time_ms << "ms.";
+		std::cout << " -- Processing Time = " << results.plates[i].processing_time_ms << "ms.";
 	  std::cout << std::endl;
 
 
-      for (int k = 0; k < results[i].topNPlates.size(); k++)
+      for (int k = 0; k < results.plates[i].topNPlates.size(); k++)
       {
-        std::cout << "    - " << results[i].topNPlates[k].characters << "\t confidence: " << results[i].topNPlates[k].overall_confidence << "\t template_match: " << results[i].topNPlates[k].matches_template << std::endl;
+        std::cout << "    - " << results.plates[i].topNPlates[k].characters << "\t confidence: " << results.plates[i].topNPlates[k].overall_confidence << "\t template_match: " << results.plates[i].topNPlates[k].matches_template << std::endl;
       }
     }
   }
 
 
 
-  return results.size() > 0;
+  return results.plates.size() > 0;
 }
 

src/openalpr/alpr.cpp

@@ -32,31 +32,34 @@ Alpr::~Alpr()
   delete impl;
 }
 
-std::vector<AlprResult> Alpr::recognize(std::string filepath)
+AlprResults Alpr::recognize(std::string filepath)
+{
+
+  std::ifstream ifs(filepath.c_str(), std::ios::binary|std::ios::ate);
+  std::ifstream::pos_type pos = ifs.tellg();
+
+  std::vector<char>  buffer(pos);
+
+  ifs.seekg(0, std::ios::beg);
+  ifs.read(&buffer[0], pos);
+
+  return this->recognize( buffer );
+}
+
+AlprResults Alpr::recognize(std::vector<char> imageBytes)
 {
   std::vector<AlprRegionOfInterest> regionsOfInterest;
-  return this->recognize(filepath, regionsOfInterest);
+  return impl->recognize(imageBytes, regionsOfInterest);
 }
 
-std::vector<AlprResult> Alpr::recognize(std::string filepath, std::vector<AlprRegionOfInterest> regionsOfInterest)
+AlprResults Alpr::recognize(unsigned char* pixelData, int bytesPerPixel, int imgWidth, int imgHeight, std::vector<AlprRegionOfInterest> regionsOfInterest)
 {
-  return impl->recognize(filepath, regionsOfInterest);
+  return impl->recognize(pixelData, bytesPerPixel, imgWidth, imgHeight, regionsOfInterest);
 }
 
-std::vector<AlprResult> Alpr::recognize(std::vector<unsigned char> imageBuffer)
+std::string Alpr::toJson( AlprResults results )
 {
-  std::vector<AlprRegionOfInterest> regionsOfInterest;
-  return this->recognize(imageBuffer, regionsOfInterest);
-}
-
-std::vector<AlprResult> Alpr::recognize(std::vector<unsigned char> imageBuffer, std::vector<AlprRegionOfInterest> regionsOfInterest)
-{
-  return impl->recognize(imageBuffer, regionsOfInterest);
-}
-
-std::string Alpr::toJson(const std::vector< AlprResult > results, double processing_time_ms, long epoch_time)
-{
-  return impl->toJson(results, processing_time_ms, epoch_time);
+  return impl->toJson(results);
 }
 
 void Alpr::setDetectRegion(bool detectRegion)
@@ -84,12 +87,4 @@ std::string Alpr::getVersion()
   return AlprImpl::getVersion();
 }
 
-// Results code
 
-AlprResult::AlprResult()
-{
-}
-
-AlprResult::~AlprResult()
-{
-}

src/openalpr/alpr.h

@@ -22,7 +22,7 @@
 
 #include <iostream>
 #include <vector>
-
+#include <fstream> 
 
 struct AlprPlate
 {
@@ -38,19 +38,29 @@ struct AlprCoordinate
   int y;
 };
 
-struct AlprRegionOfInterest
+class AlprRegionOfInterest
 {
+public:
+  AlprRegionOfInterest();
+  AlprRegionOfInterest(int x, int y, int width, int height)
+  {
+    this->x = x;
+    this->y = y;
+    this->width = width;
+    this->height = height;
+  };
+  
   int x;
   int y;
   int width;
   int height;
 };
 
-class AlprResult
+class AlprPlateResult
 {
   public:
-    AlprResult();
-    virtual ~AlprResult();
+    AlprPlateResult() {};
+    virtual ~AlprPlateResult() {};
 
     int requested_topn;
     int result_count;
@@ -65,6 +75,24 @@ class AlprResult
     std::string region;
 };
 
+class AlprResults
+{
+  public:
+    AlprResults() {};
+    virtual ~AlprResults() {};
+
+    long epoch_time;
+    int img_width;
+    int img_height;
+    int total_processing_time_ms;
+    
+    std::vector<AlprPlateResult> plates;
+    
+    std::vector<AlprRegionOfInterest> regionsOfInterest;
+
+};
+
+
 class AlprImpl;
 class Alpr
 {
@@ -77,12 +105,17 @@ class Alpr
     void setTopN(int topN);
     void setDefaultRegion(std::string region);
 
-    std::vector<AlprResult> recognize(std::string filepath);
-    std::vector<AlprResult> recognize(std::string filepath, std::vector<AlprRegionOfInterest> regionsOfInterest);
-    std::vector<AlprResult> recognize(std::vector<unsigned char> imageBuffer);
-    std::vector<AlprResult> recognize(std::vector<unsigned char> imageBuffer, std::vector<AlprRegionOfInterest> regionsOfInterest);
+    // Recognize from an image on disk
+    AlprResults recognize(std::string filepath);
+    
+    // Recognize from byte data representing an encoded image (e.g., BMP, PNG, JPG, GIF etc).
+    AlprResults recognize(std::vector<char> imageBytes);
+    
+    // Recognize from raw pixel data.  
+    AlprResults recognize(unsigned char* pixelData, int bytesPerPixel, int imgWidth, int imgHeight, std::vector<AlprRegionOfInterest> regionsOfInterest);
 
-    std::string toJson(const std::vector<AlprResult> results, double processing_time_ms = -1, long epoch_time = -1);
+    
+    std::string toJson(const AlprResults results);
 
     bool isLoaded();
     

src/openalpr/alpr_impl.cpp

@@ -90,12 +90,6 @@ AlprFullDetails AlprImpl::recognizeFullDetails(cv::Mat img, std::vector<cv::Rect
     if (this->config->debugGeneral)
       std::cerr << "Invalid image" << std::endl;
     
-    vector<AlprResult> emptyVector;
-    response.results = emptyVector;
-    
-    vector<PlateRegion> emptyVector2;
-    response.plateRegions = emptyVector2;
-    
     return response;
   }
 
@@ -123,7 +117,7 @@ AlprFullDetails AlprImpl::recognizeFullDetails(cv::Mat img, std::vector<cv::Rect
     bool plateDetected = false;
     if (pipeline_data.plate_area_confidence > 10)
     {
-      AlprResult plateResult;
+      AlprPlateResult plateResult;
       plateResult.region = defaultRegion;
       plateResult.regionConfidence = 0;
 
@@ -183,7 +177,7 @@ AlprFullDetails AlprImpl::recognizeFullDetails(cv::Mat img, std::vector<cv::Rect
       if (plateResult.result_count > 0)
       {
         plateDetected = true;
-        response.results.push_back(plateResult);
+        response.results.plates.push_back(plateResult);
       }
     }
     
@@ -217,11 +211,11 @@ AlprFullDetails AlprImpl::recognizeFullDetails(cv::Mat img, std::vector<cv::Rect
       rectangle(img, response.plateRegions[i].rect, Scalar(0, 0, 255), 2);
     }
     
-    for (uint i = 0; i < response.results.size(); i++)
+    for (uint i = 0; i < response.results.plates.size(); i++)
     {
       for (int z = 0; z < 4; z++)
       {
-	AlprCoordinate* coords = response.results[i].plate_points;
+	AlprCoordinate* coords = response.results.plates[i].plate_points;
 	Point p1(coords[z].x, coords[z].y);
 	Point p2(coords[(z + 1) % 4].x, coords[(z + 1) % 4].y);
 	line(img, p1, p2, Scalar(255,0,255), 2);
@@ -248,21 +242,32 @@ AlprFullDetails AlprImpl::recognizeFullDetails(cv::Mat img, std::vector<cv::Rect
 }
 
 
-std::vector<AlprResult> AlprImpl::recognize(std::string filepath, std::vector<AlprRegionOfInterest> regionsOfInterest)
-{
-  cv::Mat img = cv::imread(filepath, CV_LOAD_IMAGE_COLOR);
+
+AlprResults AlprImpl::recognize( std::vector<char> imageBytes, std::vector<AlprRegionOfInterest> regionsOfInterest )
+{  
+  cv::Mat img = cv::imdecode(cv::Mat(imageBytes), 1);
   
   return this->recognize(img, this->convertRects(regionsOfInterest));
 }
 
-std::vector<AlprResult> AlprImpl::recognize(std::vector<unsigned char> imageBuffer, std::vector<AlprRegionOfInterest> regionsOfInterest)
+AlprResults AlprImpl::recognize( unsigned char* pixelData, int bytesPerPixel, int imgWidth, int imgHeight, std::vector<AlprRegionOfInterest> regionsOfInterest)
 {
-  cv::Mat img = cv::imdecode(cv::Mat(imageBuffer), 1);
+  
+  int arraySize = imgWidth * imgHeight * bytesPerPixel;
+  cv::Mat imgData = cv::Mat(arraySize, 1, CV_8U, pixelData);
+  cv::Mat img = imgData.reshape(bytesPerPixel, imgHeight);
+  
+  if (regionsOfInterest.size() == 0)
+  {
+    AlprRegionOfInterest fullFrame(0,0, img.cols, img.rows);
+
+    regionsOfInterest.push_back(fullFrame);
+  }
   
   return this->recognize(img, this->convertRects(regionsOfInterest));
 }
 
-std::vector<AlprResult> AlprImpl::recognize(cv::Mat img, std::vector<cv::Rect> regionsOfInterest)
+AlprResults AlprImpl::recognize(cv::Mat img, std::vector<cv::Rect> regionsOfInterest)
 {
   
   AlprFullDetails fullDetails = recognizeFullDetails(img, regionsOfInterest);
@@ -281,26 +286,24 @@ std::vector<AlprResult> AlprImpl::recognize(cv::Mat img, std::vector<cv::Rect> r
    return rectRegions;
  }
 
-string AlprImpl::toJson(const vector<AlprResult > results, double processing_time_ms, long epoch_time)
+string AlprImpl::toJson( const AlprResults results )
 {
   cJSON *root, *jsonResults;
   root = cJSON_CreateObject();
   
-  if (epoch_time <= 0)
-    epoch_time = getEpochTime();
   
-  cJSON_AddNumberToObject(root,"epoch_time",	epoch_time	  );
+  cJSON_AddNumberToObject(root,"epoch_time",	results.epoch_time	  );
   cJSON_AddNumberToObject(root,"version",	2	  );
   
-  if (processing_time_ms >= 0)
+  if (results.total_processing_time_ms >= 0)
   {
-    cJSON_AddNumberToObject(root,"processing_time_ms",		processing_time_ms );
+    cJSON_AddNumberToObject(root,"processing_time_ms",		results.total_processing_time_ms );
   }
   
   cJSON_AddItemToObject(root, "results", 		jsonResults=cJSON_CreateArray());
-  for (uint i = 0; i < results.size(); i++)
+  for (uint i = 0; i < results.plates.size(); i++)
   {
-    cJSON *resultObj = createJsonObj( &results[i] );
+    cJSON *resultObj = createJsonObj( &results.plates[i] );
     cJSON_AddItemToArray(jsonResults, resultObj);
   }
   
@@ -318,7 +321,7 @@ string AlprImpl::toJson(const vector<AlprResult > results, double processing_tim
 
 
 
-cJSON* AlprImpl::createJsonObj(const AlprResult* result)
+cJSON* AlprImpl::createJsonObj(const AlprPlateResult* result)
 {
   cJSON *root, *coords, *candidates;
   

src/openalpr/alpr_impl.h

@@ -56,7 +56,7 @@
 struct AlprFullDetails
 {
   std::vector<PlateRegion> plateRegions;
-  std::vector<AlprResult> results;
+  AlprResults results;
 };
 
 class AlprImpl
@@ -69,17 +69,17 @@ class AlprImpl
     AlprFullDetails recognizeFullDetails(cv::Mat img);
     AlprFullDetails recognizeFullDetails(cv::Mat img, std::vector<cv::Rect> regionsOfInterest);
     
-    std::vector<AlprResult> recognize(std::string filepath, std::vector<AlprRegionOfInterest> regionsOfInterest);
-    std::vector<AlprResult> recognize(std::vector<unsigned char> imageBuffer, std::vector<AlprRegionOfInterest> regionsOfInterest);
-    std::vector<AlprResult> recognize(cv::Mat img, std::vector<cv::Rect> regionsOfInterest);
+    AlprResults recognize( std::vector<char> imageBytes, std::vector<AlprRegionOfInterest> regionsOfInterest );
+    AlprResults recognize( unsigned char* pixelData, int bytesPerPixel, int imgWidth, int imgHeight, std::vector<AlprRegionOfInterest> regionsOfInterest );
+    AlprResults recognize( cv::Mat img, std::vector<cv::Rect> regionsOfInterest );
     
-    void applyRegionTemplate(AlprResult* result, std::string region);
+    void applyRegionTemplate(AlprPlateResult* result, std::string region);
     
     void setDetectRegion(bool detectRegion);
     void setTopN(int topn);
     void setDefaultRegion(std::string region);
     
-    std::string toJson(const std::vector<AlprResult> results, double processing_time_ms = -1, long epoch_time = -1);
+    std::string toJson( const AlprResults results );
     static std::string getVersion();
     
     Config* config;
@@ -98,7 +98,7 @@ class AlprImpl
     
     std::vector<cv::Rect> convertRects(std::vector<AlprRegionOfInterest> regionsOfInterest);
     
-    cJSON* createJsonObj(const AlprResult* result);
+    cJSON* createJsonObj(const AlprPlateResult* result);
 };