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  • Several years ago, software developers always had to write programming code from scratch for every new functionality that is to be implemented in any project. This system can be a nightmare for most people as it is inefficient and time-consuming. Writing from scratch also implies that you will have a lot of debugging to do.

    Interest has shifted towards developers that can produce functional code of high quality within the shortest possible time. Whether everything was done from scratch or not is irrelevant. OpenCV makes it possible for you to integrate a lot of functionalities and designs into your work regardless of how complex your project seems.

    How Can OpenCV be Useful

    OpenCV (Open Source Computer Vision) is a computer program that offers several free algorithms with permission to alter the source code for each one. A developer can use these algorithms to improve the capabilities of a software or web application without having to write the code from scratch. The program features a couple of interfaces for various platforms including Windows, Linux, Mac OS, Android, and iOS. It supports programming languages like Java, Python, and C++. OpenCV is able to exploit multi-core architecture which is helpful when you need to restructure and parallelize your code. This allows you access to the same functions or methods in different threads.

    There are several different modules that are available to developers on OpenCV. The Core module can be used to define the basic data structures and functions to be implemented by other modules. The High-Level GUI module gives you access to simple UI designs and the image processing module gives you access to a lot of editing options for images. There are modules for 3D reconstruction and camera calibration as well as salient feature detection. The video modules can be used in making videos as well as analysis through object tracking algorithms for background subtraction and motion estimation. Instances of predefined classes can be detected with the help of the Object Detection module. This feature comes in handy for developers of face detection software and security systems.

    A number of algorithms can be implemented from the GPU module enabling you to take advantage of GPU computational capabilities for improved performance. OpenCV automatically allocates and deallocates data for better memory management. Its error-handling capabilities ensure that you are able to debug your code with ease. 

    Accuracy tests for all OpenCV modules are available to ensure that they are producing the required output.

    OpenCV Key Features Include:

    • Regression tests for all modules;
    • Error handling capabilities;
    • Automatic memory management;
    • Several modules for the best possible performance;
    • Supports various interfaces for multiple platforms;
    • Supports multithreading enabling you to parallelize your code.


    OpenCV can efficiently handle a lot of complex tasks while taking advantage of your hardware acceleration for the best results. It is used by individuals, companies, government bodies and research groups in different fields from augmented reality to interactive art and lots more.

  • What's new in 4.1.1 version?

    DNN module:

    • TBD

    Performance improvements:

    • AVX512 SIMD backend for wide universal intrinsics (w.u.i.)
    • More optimizations using wide universal intrinsics

    Android support:

    • Added CameraActivity utility class to automate Camera permission handling on Android
    • Changed default C++ runtime: c++_static -> c++_shared
    • Unified code for frame size selection between JavaCamera2View / JavaCameraView

    And many other great patches from OpenCV community:

    • Added IPPE method for planar pose estimation in solvePnP ( https://github.com/opencv/opencv/pull/14362 )
    • Added solvePnPRefineLM and solvePnPRefineVVS ( https://github.com/opencv/opencv/pull/14431 )
    • Logging revamp ( https://github.com/opencv/opencv/pull/13909 by @kinchungwong )
    • opencv_contrib: Tracking-by-Matching approach
    • opencv_contrib: added AR samples into ovis module

    Breaking changes:

    • solveP3P, solvePnP and solvePnPGeneric return result in double precision unless the parameters are not empty


More info

  • Last Updated: 2019-08-12
  • Developer: OpenCV team
  • Homepage: opencv.org
  • Version: 4.1.1
  • File size: 221.14 MB
  • Downloads: 1,556
  • Operating system: Windows 10, Windows 8/8.1, Windows 7, Windows Vista, Windows XP
  • Filename: opencv-4.1.1-vc14_vc15.exe
  • MD5 Checksum: cbbfebc6358bf26379afa9f229925734