OutputManagerJSON class is a class that abstracts final JSON output-producing operations. More...

#include <OutputManager.hpp>

Inheritance diagram for OutputManagerJSON:

Public Member Functions
bool	loadJSON (std::string filePathJSON, Json::Value &currentJSON)
	Loads a JSON file and returns it as a reference. The JSON file path on disk is given. More...

void	saveJSON (std::string filePath)
	Saves content present in the "stringOutputData" in a JSON file. The file path where to save the file is given. More...

Json::Value	getValueAt (std::string key, Json::Value currentJSON)
	Utility method to get the value at a given key in a given JSON node. More...

Json::Value	getValueAt (unsigned int i, Json::Value currentJSON)
	Utility method to get i-th value in a given JSON node. More...

Json::Value	getValueAt (std::string key, unsigned int i, Json::Value currentJSON)
	Utility method to get the value at a given key of the i-th value in a given JSON node. More...

void	createJSON (Json::Value &people, cv::Mat &colorImage, cv::Mat &distanceImage, cv::Mat &skeletonOnlyImage, unsigned int nFrame, const char *outputFolder, const float skeletonThreshold)
	This methods take a reference to a JSON node that represents all the people's informations within the frame, color, depth, distance, and skeleton-only frame, the current frame ID, and the output folder's path on disk and for each person in the people's JSON node, the method extracts, generates, and appends a single Skeleton to the current JSON node. More...

Protected Member Functions
Json::Value	makeOutputString (std::vector< Point3D * > skeletonPoints3D, std::vector< bool > bodyKeyPointsMap, unsigned int frameID, unsigned int personID) override
	This method is specific for saving the output in JSON format. More...

void	setStringOutputData (std::string stringOutputData)
	Set the output file's content. More...

std::string	getStringOutputData (void)
	Get the output file's content. More...

Private Attributes
std::string	stringOutputData
	Output file's content. More...

Detailed Description

OutputManagerJSON class is a class that abstracts final JSON output-producing operations.

Definition at line 73 of file OutputManager.hpp.

Member Function Documentation

◆ createJSON()

void OutputManagerJSON::createJSON	(	Json::Value &	people,
		cv::Mat &	colorImage,
		cv::Mat &	distanceImage,
		cv::Mat &	skeletonOnlyImage,
		unsigned int	nFrame,
		const char *	outputFolder,
		const float	skeletonThreshold
	)

This methods take a reference to a JSON node that represents all the people's informations within the frame, color, depth, distance, and skeleton-only frame, the current frame ID, and the output folder's path on disk and for each person in the people's JSON node, the method extracts, generates, and appends a single Skeleton to the current JSON node.

Parameters

people	JSON node containing people's informations detected within the frame.
colorImage	color frame.
distanceImage	distance frame.
skeletonOnlyImage	skeleton-only frame.
nFrame	current image ID.
outputFolder	output folder's path on disk.
skeletonThreshold	The magnitude or intensity that must be exceeded for a specific reaction, phenomenon, result, or condition to occur or be manifested. In this case, if the skeleton's confidence mean value is greater than "skeletonThreshold", then the skeleton will be considered a meaningful skeleton.

See also: Skeleton.hpp

Definition at line 67 of file OutputManagerJSON.cpp.

                                                                                                                                                                                                           {
    Json::Value root, peopleArray(Json::arrayValue);
    std::stringstream outputJsonFilePath;
    root["ID_Frame"] = nFrame;
    root["thingId"] = Json::Value(std::string("digitaltwin:Laboratorio_Corridoio:1"));
    
 
    // For each OpenPose's detected skeleton 
    for (Json::Value::ArrayIndex i = 0; i < people.size(); i++) {
        Json::Value singlePerson = getValueAt("pose_keypoints_2d", i, people);
        Skeleton singlePersonSkeleton = Skeleton(colorImage, distanceImage, skeletonOnlyImage, singlePerson);
        singlePersonSkeleton.generateSkeleton();
        // Discard Skeleton with low consistency value
        if (singlePersonSkeleton.getConsistency() > skeletonThreshold) {
            peopleArray.append(makeOutputString(* singlePersonSkeleton.getSkeletonPoints3D(), singlePersonSkeleton.getBodyKeyPointsMap(), nFrame, (unsigned int) i));
        }
    }
    
    root["People"] = peopleArray;
    OutputManager::setStringOutputData(root.toStyledString());
    outputJsonFilePath << outputFolder << "movement/frame" << nFrame << "_" << JSON_FILE_PATH;
    saveJSON(std::string(outputJsonFilePath.str()));
    outputJsonFilePath.str(std::string());
    outputJsonFilePath.clear();
}

References Skeleton::generateSkeleton(), Skeleton::getBodyKeyPointsMap(), Skeleton::getConsistency(), Skeleton::getSkeletonPoints3D(), getValueAt(), JSON_FILE_PATH, makeOutputString(), saveJSON(), and OutputManager::setStringOutputData().

Referenced by OpenCV_Manager::showSkeletonsCV().

◆ getStringOutputData()

std::string OutputManager::getStringOutputData ( void )

protectedinherited

Get the output file's content.

Returns: std::string

Definition at line 19 of file OutputManager.cpp.

                                                  {
    return this->stringOutputData;
}

References OutputManager::stringOutputData.

Referenced by saveJSON().

◆ getValueAt() [1/3]

Json::Value OutputManagerJSON::getValueAt	(	std::string	key,
		Json::Value	currentJSON
	)

Utility method to get the value at a given key in a given JSON node.

Parameters

key	Key at which the value in the JSON node will be found.
currentJSON	Reference to JSON node.

Returns: Json::Value

Definition at line 55 of file OutputManagerJSON.cpp.

                                                                             {
    return currentJSON[key];
}

Referenced by Skeleton::calcBodyKeypoints(), createJSON(), and OpenCV_Manager::showSkeletonsCV().

◆ getValueAt() [2/3]

Json::Value OutputManagerJSON::getValueAt	(	std::string	key,
		unsigned int	i,
		Json::Value	currentJSON
	)

Utility method to get the value at a given key of the i-th value in a given JSON node.

Parameters

key	Key at which the value in the JSON node will be found.
i	Index at which the value in the JSON node will be found.
currentJSON	Reference to JSON node.

Returns: Json::Value

Definition at line 63 of file OutputManagerJSON.cpp.

                                                                                             {
    return (currentJSON[i])[key];
}

◆ getValueAt() [3/3]

Json::Value OutputManagerJSON::getValueAt	(	unsigned int	i,
		Json::Value	currentJSON
	)

Utility method to get i-th value in a given JSON node.

Parameters

i	Index at which the value in the JSON node will be found.
currentJSON	Reference to JSON node.

Returns: Json::Value

Definition at line 59 of file OutputManagerJSON.cpp.

                                                                              {
    return currentJSON[i];
}

◆ loadJSON()

bool OutputManagerJSON::loadJSON	(	std::string	filePathJSON,
		Json::Value &	currentJSON
	)

Loads a JSON file and returns it as a reference. The JSON file path on disk is given.

Parameters

filePathJSON	JSON file path on disk.
currentJSON	JSON reference where the JSON file will be load.

Returns: true if the file-loading ends correctly.; false if the file-loading does not end correctly.

Definition at line 42 of file OutputManagerJSON.cpp.

                                                                                 {
    Json::Reader readerJSON;
    std::ifstream streamJSON(filePathJSON.c_str(), std::ifstream::binary);
    return readerJSON.parse(streamJSON, currentJSON, false);
}

Referenced by FacadeSingleton::sendData(), and OpenCV_Manager::showSkeletonsCV().

◆ makeOutputString()

Json::Value OutputManagerJSON::makeOutputString	(	std::vector< Point3D * >	skeletonPoints3D,
		std::vector< bool >	bodyKeyPointsMap,
		unsigned int	frameID,
		unsigned int	personID
	)

overrideprotectedvirtual

This method is specific for saving the output in JSON format.

Parameters

skeletonPoints3D	A vector that contains pointers to Points3D whose coordinates represent the skeleton's junctions in certain space coordinates.
bodyKeyPointsMap	A vector that contains for each body joint retrieved from OpenPose a corresponding boolean that means if that body joint is a valuable and effective body joint or not.
frameID	current frame ID.
personID	current person ID within the current frame.

Returns: Json::Value

Implements OutputManager.

Definition at line 15 of file OutputManagerJSON.cpp.

                                                                                                                                                                     {
    Json::Value root, arraySkeletonPoints3D(Json::arrayValue);
    Json::StyledStreamWriter writer;
    
    // For each OpenPose's skeleton body joint point
    for (unsigned char i = 0; i < skeletonPoints3D.size(); i++) {
        if (i >= openPoseBodyKeyPointsNumber) continue;
        Json::Value singlePoint3D_JSON;
        // Build JSON node for i-th body joint point
        singlePoint3D_JSON["pointID"] = Json::Value((unsigned int) i);
        singlePoint3D_JSON["confidence"] = Json::Value(((BodyKeyPoint *) skeletonPoints3D.at(i)->getDecorated())->getConfidence());
        singlePoint3D_JSON["x"] = Json::Value((double) skeletonPoints3D.at(i)->getZ());
        singlePoint3D_JSON["y"] = Json::Value((double) skeletonPoints3D.at(i)->getY());
        singlePoint3D_JSON["z"] = Json::Value((double) skeletonPoints3D.at(i)->getX());
        singlePoint3D_JSON["x_rotation"] = Json::Value(0.0);
        singlePoint3D_JSON["y_rotation"] = Json::Value(0.0);
        singlePoint3D_JSON["z_rotation"] = Json::Value(0.0);
        singlePoint3D_JSON["w_rotation"] = Json::Value(1.0);
        arraySkeletonPoints3D.append(singlePoint3D_JSON);
    }
 
    root["personID"] = Json::Value((unsigned int) personID);
    root["skeleton"] = arraySkeletonPoints3D;
    OutputManager::setStringOutputData(root.toStyledString());
    return root;
}

References openPoseBodyKeyPointsNumber, and OutputManager::setStringOutputData().

Referenced by createJSON().

◆ saveJSON()

void OutputManagerJSON::saveJSON ( std::string filePath )

Saves content present in the "stringOutputData" in a JSON file. The file path where to save the file is given.

Parameters

filePath The file path where to save the JSON file.

Definition at line 48 of file OutputManagerJSON.cpp.

                                                    {
    Json::StyledStreamWriter writer;
    std::ofstream outputFile(filePath);
    outputFile << OutputManager::getStringOutputData();
    outputFile.close();
}

References OutputManager::getStringOutputData().

Referenced by createJSON().

◆ setStringOutputData()

void OutputManager::setStringOutputData ( std::string stringOutputData )

protectedinherited

Set the output file's content.

Parameters

stringOutputData

Definition at line 15 of file OutputManager.cpp.

                                                                   {
    this->stringOutputData = stringOutputData;
}

References OutputManager::stringOutputData.

Referenced by createJSON(), and makeOutputString().

Member Data Documentation

◆ stringOutputData

std::string OutputManager::stringOutputData

privateinherited

Output file's content.

Definition at line 37 of file OutputManager.hpp.

Referenced by OutputManager::getStringOutputData(), and OutputManager::setStringOutputData().

The documentation for this class was generated from the following files:

Managers/OutputManagers/OutputManager.hpp
Managers/OutputManagers/OutputManagerJSON.cpp

Public Member Functions

Protected Member Functions

Private Attributes

Detailed Description

Member Function Documentation

◆ createJSON()

◆ getStringOutputData()

◆ getValueAt() [1/3]

◆ getValueAt() [2/3]

◆ getValueAt() [3/3]

◆ loadJSON()

◆ makeOutputString()

◆ saveJSON()

◆ setStringOutputData()

Member Data Documentation

◆ stringOutputData