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Computer Vision Tutorial

Last Updated : 11 Mar, 2024
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Computer vision, a fascinating field at the intersection of computer science and artificial intelligence, which enables computers to analyze images or video data, unlocking a multitude of applications across industries, from autonomous vehicles to facial recognition systems.

This Computer Vision tutorial is designed for both beginners and experienced professionals, covering both basic and advanced concepts of computer vision, including Digital Photography, Satellite Image Processing, Pixel Transformation, Color Correction, Padding, Filtering, Object Detection and Recognition, and Image Segmentation.


What is Computer Vision?

Computer vision is a field of study within artificial intelligence (AI) that focuses on enabling computers to Intercept and extract information from images and videos, in a manner similar to human vision. It involves developing algorithms and techniques to extract meaningful information from visual inputs and make sense of the visual world.

Prerequisite: Before Starting Computer Vision It’s Recommended that you should have a foundational knowledge of Machine Learning, Deep learning and an OpenCV. you can refer to our tutorial page on prerequisites technologies.

Computer Vision Examples:

Here are some examples of computer vision:

  • Facial recognition: Identifying individuals through visual analysis.
  • Self-driving cars: Using computer vision to navigate and avoid obstacles.
  • Robotic automation: Enabling robots to perform tasks and make decisions based on visual input.
  • Medical anomaly detection: Detecting abnormalities in medical images for improved diagnosis.
  • Sports performance analysis: Tracking athlete movements to analyze and enhance performance.
  • Manufacturing fault detection: Identifying defects in products during the manufacturing process.
  • Agricultural monitoring: Monitoring crop growth, livestock health, and weather conditions through visual data.

These are just a few examples of the many ways that computer vision is used today. As the technology continues to develop, we can expect to see even more applications for computer vision in the future.

Computer Vision Tutorials Index

Overview of computer vision and its Applications

Image Processing & Transformation

Feature Extraction and Description:

Deep Learning for Computer Vision

Object Detection and Recognition

Image Segmentation

3D Reconstruction

  • Structure From Motion for 3D Reconstruction
  • Monocular Depth Estimation Techniques
  • Fusion Techniques for 3D Reconstruction
    • LiDAR | Light Detection and Ranging
    • Depth Sensor Fusion
  • Volumetric Reconstruction
  • Point Cloud Reconstruction

Computer Vision Interview Questions

  • Computer Vision Interview

Computer Vision Projects

How does Computer Vision Work?

Computer Vision Works similarly to our brain and eye work, To get any Information first our eye capture that image and then sends that signal to our brain. Then After, our brain processes that signal data and converted it into meaningful full information about the object then It recognizes/categorises that object based on its properties. 

In a similar fashion to Computer Vision Work, In CV we have a camera to capture the Objects and Then it processes that Visual data by some pattern recognition algorithms and based on that property that object is identified. But, Before giving unknown data to the machine/Algorithm, we trained that machine on a vast amount of Visual labelled data. This labelled data enables the machine to analyze different patterns in all the data points and can relate to those labels.

Example: Suppose we provide audio data of thousands of bird songs. In that case, the computer learns from this data, analyzes each sound, pitch, duration of each note, rhythm, etc., and hence identifies patterns similar to bird songs and generates a model. As a result, this audio recognition model can now accurately detect whether the sound contains a bird song or not for each input sound.

Evolution of Computer Vision

Time Period

Evolution of Computer Vision

  1. Development of deep learning algorithms for. recognition image.
  2. Introduction of convolutional neural networks (CNNs) for image classification. 
  3. Use of computer vision in autonomous vehicles for object detection and navigation.
  1. Advancements in real-time object detection with systems like YOLO (You Only Look Once). 
  2. in facial recognition technology, used in various applications like unlocking smartphones and surveillance.
  3. Integration of computer vision in augmented reality (AR) and virtual reality (VR) systems. 
  4. Use of computer vision in medical imaging for disease diagnosis.
2020-2025 (Predicted)
  1. Further advancements in real-time object detection and image recognition.
  2. More sophisticated use of computer vision in autonomous vehicles.
  3. Increased use of computer vision in healthcare for early disease detection and treatment.
  4. Integration of computer vision in more consumer products, like smart home devices.

Applications of Computer Vision

  1. Healthcare: Computer vision is used in medical imaging to detect diseases and abnormalities. It helps in analyzing X-rays, MRIs, and other scans to provide accurate diagnoses.
  2. Automotive Industry: In self-driving cars, computer vision is used for object detection, lane keeping, and traffic sign recognition. It helps in making autonomous driving safe and efficient.
  3. Retail: Computer vision is used in retail for inventory management, theft prevention, and customer behaviour analysis. It can track products on shelves and monitor customer movements.
  4. Agriculture: In agriculture, computer vision is used for crop monitoring and disease detection. It helps in identifying unhealthy plants and areas that need more attention.
  5. Manufacturing: Computer vision is used in quality control in defect detect can It. manufacturing products that are hard to spot with the human eye.
  6. Security and Surveillance: Computer vision is used in security cameras to detect suspicious activities, recognize faces, and track objects. It can alert security personnel when it detects a threat.
  7. Augmented and Virtual Reality: In AR and VR, computer vision is used to track the user’s movements and interact with the virtual environment. It helps in creating a more immersive experience.
  8. Social Media: Computer vision is used in social media for image recognition. It can identify objects, places, and people in images and provide relevant tags.
  9. Drones: In drones, computer vision is used for navigation and object tracking. It helps in avoiding obstacles and tracking targets.
  10. Sports: In sports, computer vision is used for player tracking, game analysis, and highlight generation. It can track the movements of players and the ball to provide insightful statistics.

FAQs on Computer Vision

Q1. What is OpenCV in computer vision?

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.

Q2. Is cv2 and OpenCV same?

No, Actually cv2 was a old Interface of old OpenCV versions named as cv. it is the name that openCV developers choose when they created the binding generators.

Q3. Is OpenCV a C++ or Python?

OpenCV is written by C++ and has more than 2,500 optimized algorithms.

Q4. Which algorithm OpenCV uses?

OpenCV uses various algorithms, including but not limited to, Haar cascades, SIFT (Scale-Invariant Feature Transform), SURF (Speeded-Up Robust Features), and ORB (Oriented FAST and Rotated BRIEF).

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