show / openpose /examples /tutorial_api_cpp /15_synchronous_custom_preprocessing.cpp
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// ------------------------- OpenPose C++ API Tutorial - Example 14 - Custom Pre-processing -------------------------
// Synchronous mode: ideal for production integration. It provides the fastest results with respect to runtime
// performance.
// In this function, the user can implement its own pre-processing, i.e., his function will be called after the image
// has been read by OpenPose but before OpenPose processes the frames.
// Third-party dependencies
#include <opencv2/opencv.hpp>
// Command-line user interface
#include <openpose/flags.hpp>
// OpenPose dependencies
#include <openpose/headers.hpp>
// This worker will just invert the image
class WUserPreProcessing : public op::Worker<std::shared_ptr<std::vector<std::shared_ptr<op::Datum>>>>
{
public:
WUserPreProcessing()
{
// User's constructor here
}
void initializationOnThread() {}
void work(std::shared_ptr<std::vector<std::shared_ptr<op::Datum>>>& datumsPtr)
{
try
{
// User's pre-processing (after OpenPose read the input image & before OpenPose processing) here
// datumPtr->cvInputData: input frame
if (datumsPtr != nullptr && !datumsPtr->empty())
{
for (auto& datumPtr : *datumsPtr)
{
cv::Mat cvOutputData = OP_OP2CVMAT(datumPtr->cvOutputData);
cv::bitwise_not(cvOutputData, cvOutputData);
}
}
}
catch (const std::exception& e)
{
this->stop();
op::error(e.what(), __LINE__, __FUNCTION__, __FILE__);
}
}
};
void configureWrapper(op::Wrapper& opWrapper)
{
try
{
// Configuring OpenPose
// logging_level
op::checkBool(
0 <= FLAGS_logging_level && FLAGS_logging_level <= 255, "Wrong logging_level value.",
__LINE__, __FUNCTION__, __FILE__);
op::ConfigureLog::setPriorityThreshold((op::Priority)FLAGS_logging_level);
op::Profiler::setDefaultX(FLAGS_profile_speed);
// Applying user defined configuration - GFlags to program variables
// producerType
op::ProducerType producerType;
op::String producerString;
std::tie(producerType, producerString) = op::flagsToProducer(
op::String(FLAGS_image_dir), op::String(FLAGS_video), op::String(FLAGS_ip_camera), FLAGS_camera,
FLAGS_flir_camera, FLAGS_flir_camera_index);
// cameraSize
const auto cameraSize = op::flagsToPoint(op::String(FLAGS_camera_resolution), "-1x-1");
// outputSize
const auto outputSize = op::flagsToPoint(op::String(FLAGS_output_resolution), "-1x-1");
// netInputSize
const auto netInputSize = op::flagsToPoint(op::String(FLAGS_net_resolution), "-1x368");
// faceNetInputSize
const auto faceNetInputSize = op::flagsToPoint(op::String(FLAGS_face_net_resolution), "368x368 (multiples of 16)");
// handNetInputSize
const auto handNetInputSize = op::flagsToPoint(op::String(FLAGS_hand_net_resolution), "368x368 (multiples of 16)");
// poseMode
const auto poseMode = op::flagsToPoseMode(FLAGS_body);
// poseModel
const auto poseModel = op::flagsToPoseModel(op::String(FLAGS_model_pose));
// JSON saving
if (!FLAGS_write_keypoint.empty())
op::opLog(
"Flag `write_keypoint` is deprecated and will eventually be removed. Please, use `write_json`"
" instead.", op::Priority::Max);
// keypointScaleMode
const auto keypointScaleMode = op::flagsToScaleMode(FLAGS_keypoint_scale);
// heatmaps to add
const auto heatMapTypes = op::flagsToHeatMaps(FLAGS_heatmaps_add_parts, FLAGS_heatmaps_add_bkg,
FLAGS_heatmaps_add_PAFs);
const auto heatMapScaleMode = op::flagsToHeatMapScaleMode(FLAGS_heatmaps_scale);
// >1 camera view?
const auto multipleView = (FLAGS_3d || FLAGS_3d_views > 1 || FLAGS_flir_camera);
// Face and hand detectors
const auto faceDetector = op::flagsToDetector(FLAGS_face_detector);
const auto handDetector = op::flagsToDetector(FLAGS_hand_detector);
// Enabling Google Logging
const bool enableGoogleLogging = true;
// Initializing the user custom classes
// Processing
auto wUserPreProcessing = std::make_shared<WUserPreProcessing>();
// Add custom processing
const auto workerProcessingOnNewThread = true;
opWrapper.setWorker(op::WorkerType::PreProcessing, wUserPreProcessing, workerProcessingOnNewThread);
// Pose configuration (use WrapperStructPose{} for default and recommended configuration)
const op::WrapperStructPose wrapperStructPose{
poseMode, netInputSize, FLAGS_net_resolution_dynamic, outputSize, keypointScaleMode, FLAGS_num_gpu,
FLAGS_num_gpu_start, FLAGS_scale_number, (float)FLAGS_scale_gap,
op::flagsToRenderMode(FLAGS_render_pose, multipleView), poseModel, !FLAGS_disable_blending,
(float)FLAGS_alpha_pose, (float)FLAGS_alpha_heatmap, FLAGS_part_to_show, op::String(FLAGS_model_folder),
heatMapTypes, heatMapScaleMode, FLAGS_part_candidates, (float)FLAGS_render_threshold,
FLAGS_number_people_max, FLAGS_maximize_positives, FLAGS_fps_max, op::String(FLAGS_prototxt_path),
op::String(FLAGS_caffemodel_path), (float)FLAGS_upsampling_ratio, enableGoogleLogging};
opWrapper.configure(wrapperStructPose);
// Face configuration (use op::WrapperStructFace{} to disable it)
const op::WrapperStructFace wrapperStructFace{
FLAGS_face, faceDetector, faceNetInputSize,
op::flagsToRenderMode(FLAGS_face_render, multipleView, FLAGS_render_pose),
(float)FLAGS_face_alpha_pose, (float)FLAGS_face_alpha_heatmap, (float)FLAGS_face_render_threshold};
opWrapper.configure(wrapperStructFace);
// Hand configuration (use op::WrapperStructHand{} to disable it)
const op::WrapperStructHand wrapperStructHand{
FLAGS_hand, handDetector, handNetInputSize, FLAGS_hand_scale_number, (float)FLAGS_hand_scale_range,
op::flagsToRenderMode(FLAGS_hand_render, multipleView, FLAGS_render_pose), (float)FLAGS_hand_alpha_pose,
(float)FLAGS_hand_alpha_heatmap, (float)FLAGS_hand_render_threshold};
opWrapper.configure(wrapperStructHand);
// Extra functionality configuration (use op::WrapperStructExtra{} to disable it)
const op::WrapperStructExtra wrapperStructExtra{
FLAGS_3d, FLAGS_3d_min_views, FLAGS_identification, FLAGS_tracking, FLAGS_ik_threads};
opWrapper.configure(wrapperStructExtra);
// Producer (use default to disable any input)
const op::WrapperStructInput wrapperStructInput{
producerType, producerString, FLAGS_frame_first, FLAGS_frame_step, FLAGS_frame_last,
FLAGS_process_real_time, FLAGS_frame_flip, FLAGS_frame_rotate, FLAGS_frames_repeat,
cameraSize, op::String(FLAGS_camera_parameter_path), FLAGS_frame_undistort, FLAGS_3d_views};
opWrapper.configure(wrapperStructInput);
// Output (comment or use default argument to disable any output)
const op::WrapperStructOutput wrapperStructOutput{
FLAGS_cli_verbose, op::String(FLAGS_write_keypoint), op::stringToDataFormat(FLAGS_write_keypoint_format),
op::String(FLAGS_write_json), op::String(FLAGS_write_coco_json), FLAGS_write_coco_json_variants,
FLAGS_write_coco_json_variant, op::String(FLAGS_write_images), op::String(FLAGS_write_images_format),
op::String(FLAGS_write_video), FLAGS_write_video_fps, FLAGS_write_video_with_audio,
op::String(FLAGS_write_heatmaps), op::String(FLAGS_write_heatmaps_format), op::String(FLAGS_write_video_3d),
op::String(FLAGS_write_video_adam), op::String(FLAGS_write_bvh), op::String(FLAGS_udp_host),
op::String(FLAGS_udp_port)};
opWrapper.configure(wrapperStructOutput);
// GUI (comment or use default argument to disable any visual output)
const op::WrapperStructGui wrapperStructGui{
op::flagsToDisplayMode(FLAGS_display, FLAGS_3d), !FLAGS_no_gui_verbose, FLAGS_fullscreen};
opWrapper.configure(wrapperStructGui);
// Set to single-thread (for sequential processing and/or debugging and/or reducing latency)
if (FLAGS_disable_multi_thread)
opWrapper.disableMultiThreading();
}
catch (const std::exception& e)
{
op::error(e.what(), __LINE__, __FUNCTION__, __FILE__);
}
}
int tutorialApiCpp()
{
try
{
op::opLog("Starting OpenPose demo...", op::Priority::High);
const auto opTimer = op::getTimerInit();
// OpenPose wrapper
op::opLog("Configuring OpenPose...", op::Priority::High);
op::Wrapper opWrapper;
configureWrapper(opWrapper);
// Start, run, and stop processing - exec() blocks this thread until OpenPose wrapper has finished
op::opLog("Starting thread(s)...", op::Priority::High);
opWrapper.exec();
// Measuring total time
op::printTime(opTimer, "OpenPose demo successfully finished. Total time: ", " seconds.", op::Priority::High);
// Return
return 0;
}
catch (const std::exception&)
{
return -1;
}
}
int main(int argc, char *argv[])
{
// Parsing command line flags
gflags::ParseCommandLineFlags(&argc, &argv, true);
// Running tutorialApiCpp
return tutorialApiCpp();
}