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How to Use OpenCV for Machine Learning in Real-time Scenario - The Next Tech

How to Use OpenCV for Machine Learning in Real-time Scenario

by Amelia Scott — 2 years ago in Machine Learning 3 min. read

Since it’s printed under the BSD license, you’re free to create and alter the source code.

Computer vision and digital image processing systems are now being extensively implemented in face recognition, biometric validations, the Web of Things (IoT), criminal identification, trademark design detection in banking, electronic records investigation, smart label based vehicles to get recognition in toll plazas, etc.. These programs utilize picture and real-time video processing so the live record of multimedia impressions could be created for detailed analysis and forecasts.

Computer vision is broadly incorporated in various applications such as 2D and 3D image analytics, ego-motion estimation, attribute factors discovery, human-computer interaction (HCI), facial recognition systems and mobile robotics.

The following are the key research areas in computer vision and image analytics:

  • Deep neural networks such as biometric analysis
  • Facial opinion analysis and emotion recognition.
  • Real-time video investigation and recognition of Important attributes
  • Gesture recognition
  • Visual representation learning
  • Face grin detection
  • Vein training and investigation for biometrics
  • Multi-resolution approaches
  • Radiomics analytics to medical information collections
  • Automated enhancement of pictures
  • Identification and classification of items at real time

Defects forecast in manufacturing lines with live pictures of machines Industrial robots with real-time vision for catastrophe management Image reconstruction and recovery Computational photography Morphological image processing Animate vision Photogrammetry

There are quite a few libraries and tools accessible to execute personal vision and image analytics. Table 1 lists them.


OpenCV It has a huge set of algorithms and functions for real-time personal computer vision and predictive mining. OpenCV was invented and developed by Intel, and also the present instances are encouraged by W. Garage and Itseez. It was designed in order that real-time analytics of recognition and images could be performed for various programs.

Statistical machine learning libraries used by OpenCV are:

  • The statistical machine learning libraries utilized by OpenCV are:
  • Decision tree learning
  • Gradient boosting trees
  • Expectation-maximization algorithm
  • K-nearest neighbor algorithm
  • Naive Bayes classifier
  • Artificial neural networks
  • Random forest Installation of OpenCV

Installation of OpenCV

The setup of OpenCV may be performed for various programming languages such as Python, Java, C++ and lots of more. OpenCV offers open connectivity with different programs and programming languages, so the calculations of computer vision may be implemented with no worries about compatibility or dependencies.

Also read: Will Machine become a God? - Machine Vs. God

Real-time image capturing from a Webcam using OpenCV

Real-time image shooting from a Web camera with OpenCV In conventional implementations, the characteristic points of these pictures and computer vision files are recognized on the pre-saved disk pictures. This strategy can be further improved using OpenCV, once the real-time video could be marked using the characteristic points or essential points of this picture frame at a live working video. It may be employed to execute real-time recognition of dwell attribute points from a movie taken on a Webcam.

Identification of picture forgery using OpenCV

With the development and implementation of electronic authentication in various applications, the identification of initial user opinions is one of the crucial challenges now. These days, many organizations request files and certifications scanned and signed by applicants for self-attestation. This also occurs when searching for new cellular SIM cards. But, imposters may take scanned signatures out of any other file and set them in the mandatory document using digital picture editing programs such as Adobe Photoshop, PaintBrush or even photo editors. There are a range of image editing programs out there for the conversion of a genuine image to a new picture. This sort of implementation could be (and frequently is) used for producing the new forged copy of this file, with no knowledge or consent of the real applicant.

Numbers 2 and 3 depict the procedure for forgery detection at a brand new document at which the signatures are duplicated from a different source.

The next source code written in Python and OpenCV introduces the execution of Flann based test of pictures. OpenCV has tremendous calculations for the extraction of features in the pictures in addition to in movies.

Using these procedures, the manipulation in recorded files could be recognized and plotted. It’s clear from Figure 4 that the pixels are identified from the new picture (where the signature was reproduced from a different source). Hence the marking of pixel values could be achieved using machine learning and above mentioned procedures for prediction from OpenCV. Even if the individual uses highly powerful tools for picture editing, then the pixels out of where the picture segment is taken could be recognized.

Amelia Scott

Amelia is a content manager of The Next Tech. She also includes the characteristics of her log in a fun way so readers will know what to expect from her work.

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