/ Machine Learning

An open source framework built on top of TensorFlow and Keras

An open source framework built on top of TensorFlow and Keras

TensorFlow Object Counting API

The TensorFlow Object Counting API is an open source framework built on top of TensorFlow and Keras that makes it easy to develop object counting systems.

QUICK DEMO


Cumulative Counting Mode (TensorFlow implementation):


Real-Time Counting Mode (TensorFlow implementation):


Object Counting On Single Image (TensorFlow implementation):


Object Counting based R-CNN (Keras and TensorFlow implementation):

Object Segmentation & Counting based Mask R-CNN (Keras and TensorFlow implementation):


The development is on progress! The API will be updated soon, the more talented and light-weight API will be available in this repo!

  • Detailed API documentation and sample jupyter notebooks that explain basic usages of API will be added!

You can find a sample project - case study that uses TensorFlow Object Counting API in this repo.


USAGE

1.) Usage of "Cumulative Counting Mode"

1.1) For detecting, tracking and counting the pedestrians with disabled color prediction

Usage of "Cumulative Counting Mode" for the "pedestrian counting" case:

fps = 30 # change it with your input video fps
width = 626 # change it with your input video width
height = 360 # change it with your input vide height
is_color_recognition_enabled = 0 # set it to 1 for enabling the color prediction for the detected objects
roi = 385 # roi line position
deviation = 1 # the constant that represents the object counting area

object_counting_api.cumulative_object_counting_x_axis(input_video, detection_graph, category_index, is_color_recognition_enabled, fps, width, height, roi, deviation) # counting all the objects

Result of the "pedestrian counting" case:


Source code of "pedestrian counting case-study": pedestrian_counting.py


1.2) For detecting, tracking and counting the vehicles with enabled color prediction

Usage of "Cumulative Counting Mode" for the "vehicle counting" case:

fps = 24 # change it with your input video fps
width = 640 # change it with your input video width
height = 352 # change it with your input vide height
is_color_recognition_enabled = 0 # set it to 1 for enabling the color prediction for the detected objects
roi = 200 # roi line position
deviation = 3 # the constant that represents the object counting area

object_counting_api.cumulative_object_counting_y_axis(input_video, detection_graph, category_index, is_color_recognition_enabled, fps, width, height, roi, deviation) # counting all the objects

Result of the "vehicle counting" case:


Source code of "vehicle counting case-study": vehicle_counting.py


2.) Usage of "Real-Time Counting Mode"

2.1) For detecting, tracking and counting the targeted object/s with disabled color prediction

Usage of "the targeted object is bicycle":

is_color_recognition_enabled = 0 # set it to 1 for enabling the color prediction for the detected objects
targeted_objects = "bicycle"
fps = 24 # change it with your input video fps
width = 854 # change it with your input video width
height = 480 # change it with your input vide height    

object_counting_api.targeted_object_counting(input_video, detection_graph, category_index, is_color_recognition_enabled, targeted_objects, fps, width, height) # targeted objects counting

Result of "the targeted object is bicycle":

Usage of "the targeted object is person":

is_color_recognition_enabled = 0 # set it to 1 for enabling the color prediction for the detected objects
targeted_objects = "person"
fps = 24 # change it with your input video fps
width = 854 # change it with your input video width
height = 480 # change it with your input vide height    

object_counting_api.targeted_object_counting(input_video, detection_graph, category_index, is_color_recognition_enabled, targeted_objects, fps, width, height) # targeted objects counting

Result of "the targeted object is person":

Usage of "detecting, counting and tracking all the objects":

is_color_prediction_enabled = 0 # set it to 1 for enabling the color prediction for the detected objects
fps = 24 # change it with your input video fps
width = 854 # change it with your input video width
height = 480 # change it with your input vide height    

object_counting_api.object_counting(input_video, detection_graph, category_index, is_color_recognition_enabled, fps, width, height) # counting all the objects

Result of "detecting, counting and tracking all the objects":


Usage of "detecting, counting and tracking the multiple targeted objects":

targeted_objects = "person, bicycle" # (for counting targeted objects) change it with your targeted objects
fps = 25 # change it with your input video fps
width = 1280 # change it with your input video width
height = 720 # change it with your input video height
is_color_recognition_enabled = 0

object_counting_api.targeted_object_counting(input_video, detection_graph, category_index, is_color_recognition_enabled, targeted_objects, fps, width, height) # targeted objects counting

1.2) For detecting, tracking and counting "all the objects with disabled color prediction"

Usage of detecting, counting and tracking "all the objects with disabled color prediction":

is_color_prediction_enabled = 0 # set it to 1 for enabling the color prediction for the detected objects
fps = 24 # change it with your input video fps
width = 854 # change it with your input video width
height = 480 # change it with your input vide height    

object_counting_api.object_counting(input_video, detection_graph, category_index, is_color_recognition_enabled, fps, width, height) # counting all the objects

Result of detecting, counting and tracking "all the objects with disabled color prediction":

Usage of detecting, counting and tracking "all the objects with enabled color prediction":

is_color_prediction_enabled = 1 # set it to 1 for enabling the color prediction for the detected objects
fps = 24 # change it with your input video fps
width = 854 # change it with your input video width
height = 480 # change it with your input vide height    

object_counting_api.object_counting(input_video, detection_graph, category_index, is_color_recognition_enabled, fps, width, height) # counting all the objects

Result of detecting, counting and tracking "all the objects with enabled color prediction":


For sample usages of "Real-Time Counting Mode": real_time_counting.py


The minimum object detection threshold can be set in this line in terms of percentage. The default minimum object detecion threshold is 0.5!

General Capabilities of The TensorFlow Object Counting API

Here are some cool capabilities of TensorFlow Object Counting API:

  • Detect just the targeted objects
  • Detect all the objects
  • Count just the targeted objects
  • Count all the objects
  • Predict color of the targeted objects
  • Predict color of all the objects
  • Predict speed of the targeted objects
  • Predict speed of all the objects
  • Print out the detection-counting result in a .csv file as an analysis report
  • Save and store detected objects as new images under detected_object folder
  • Select, download and use state of the art models that are trained by Google Brain Team
  • Use your own trained models or a fine-tuned model to detect spesific object/s
  • Save detection and counting results as a new video or show detection and counting results in real time
  • Process images or videos depending on your requirements

Here are some cool architectural design features of TensorFlow Object Counting API:

  • Lightweigth, runs in real-time
  • Scalable and well-designed framework, easy usage
  • Gets "Pythonic Approach" advantages
  • It supports REST Architecture and RESTful Web Services

TODOs:

  • Custom Object Trainer Interface will be added.
  • A Custom Object Counting Sample project will be released.
  • Autonomus Training Image Annotation Tool will be developed.

Theory

System Architecture

  • Object detection and classification have been developed on top of TensorFlow Object Detection API, see for more info.

  • Object color prediction has been developed using OpenCV via K-Nearest Neighbors Machine Learning Classification Algorithm is Trained Color Histogram Features, see for more info.

TensorFlow™ is an open source software library for numerical computation using data flow graphs. Nodes in the graph represent mathematical operations, while the graph edges represent the multidimensional data arrays (tensors) communicated between them.

OpenCV (Open Source Computer Vision Library) is an open source computer vision and machine learning software library. OpenCV was built to provide a common infrastructure for computer vision applications and to accelerate the use of machine perception in the commercial products.

Tracker

Source video is read frame by frame with OpenCV. Each frames is processed by "SSD with Mobilenet" model is developed on TensorFlow. This is a loop that continue working till reaching end of the video. The main pipeline of the tracker is given at the above Figure.

Models

By default I use an "SSD with Mobilenet" model in this project. You can find more information about SSD in here.

Please, See the detection model zoo for a list of other models that can be run out-of-the-box with varying speeds and accuracies. You can easily select, download and use state-of-the-art models that are suitable for your requeirements using TensorFlow Object Detection API.

You can perform transfer learning on trained TensorFlow models to build your custom object counting systems!

Project Demo

Demo video of the project is available on My YouTube Channel.

Installation

Dependencies

Tensorflow Object Counting API depends on the following libraries:

  • TensorFlow Object Detection API
  • Protobuf 3.0.0
  • Python-tk
  • Pillow 1.0
  • lxml
  • tf Slim (which is included in the "tensorflow/models/research/" checkout)
  • Jupyter notebook
  • Matplotlib
  • Tensorflow
  • Cython
  • contextlib2
  • cocoapi

For detailed steps to install Tensorflow, follow the Tensorflow installation instructions.

TensorFlow Object Detection API have to be installed to run TensorFlow Object Counting API, for more information, please see this.

Citation

If you use this code for your publications, please cite it as:

@ONLINE{tfocapi,
    author = "Ahmet Özlü",
    title  = "TensorFlow Object Counting API",
    year   = "2018",
    url    = "https://github.com/ahmetozlu/tensorflow_object_counting_api"
}

Author

Ahmet Özlü

GitHub