Algorithms for your application

This part of the Ikomia API aims to leverage algorithms coming from the Marketplace into standalone application. It provides a simple and fast way to integrate state of the art methods to your image analysis pipeline. Ikomia API is framework-agnostic, algorithms can be implemented in your favorite Python library (PyTorch, TensorFlow, Scikit-image …).


If you are interested in integrating your own algorithm in Ikomia, please consult this documentation.


You simply install Ikomia API via pip for Linux and Windows (CPU only):

pip install ikomia

With GPU enabled:

pip install ikomia==0.7.0+cu11 -f


For this beta version, we provide Python wheel for Python 3.7, 3.8 and 3.9. It includes OpenCV package (v4.5.2) with CUDA enabled (v11), and CuDNN 8. Thus, you must have CUDA 11 drivers for your graphic card and install machine learning framework compatible with CUDA 11. For Linux users, the wheel targets the platform manylinux2014 so that it should be compatible with most of recent distributions. For Windows, the wheel is only compatible with Windows 10.



A GPU-enabled version of OpenCV is bundled within the Ikomia package. It includes all the core and contribution librairies with CUDA support. There is only one important constraint to respect, you must import Ikomia module before importing cv2 module.

As a result, the package opencv-python from Pypi repository must not be installed in the same Python environment. This will lead to incompatibility issues.



This is the core concept to leverage algorithms in your application. It consists in a graph-based structure that allows to build complex scenario by connecting tasks (ie algorithms) through inputs and outputs. Workflow can either be created from scratch or loading from file exported by the workflow editor of Ikomia Studio. In the second case, no code is needed, you just have to build your workflow graphically, evaluate it on your data and export it when you are done.

The Python class Workflow is based on a C++ implementation to ensure performance.


Ikomia Studio workflow editor


The registry module ensures the algorithm management in the Ikomia platform. The module manages operations like download, installation, update and instanciation. All algorithms are uniquely identified by their name. So you will handle tasks primarly by their names while implementing your workflow. When importing the Python ikomia module, you will have acces to the global Ikomia registry (IkomiaRegistry).


A task represents the implementation of a specific algorithm. The common usage of the task object is to insert it in a workflow as a node and connect it to others tasks. But a task is also a standalone object that can be executed independently. In Ikomia platform, a task implementation have to follow a specific architecture (plugin mechanism) as described in this section. This API provides high level functions to facilitate the use of Ikomia tasks (task).

Inputs and outputs

Every task comes with a list of inputs and outputs. Tasks are connected within a workflow thanks to their inputs/outputs. Ikomia workflow is designed to deal with almost any algorithm based on image. So depending of the algorithm, you will have to deal with several types of inputs/outputs. This API provides a comprehensive list of I/O types to address common needs in Computer Vision. You will find more information here.


Access to the Ikomia Marketplace is reserved for registered users. So if you need algorithms from the Marketplace in your workflow, you have to set your Ikomia credentials in environment variables: IKOMIA_USER and IKOMIA_PWD.

In practice

Let’s dive now into the API with practical examples: