OpenCV trackbars and OS X

Preamble

Notoriously poor coding by the OpenCV group here, with trackbars being barely functional.

The two main issues are:

• Trackbar value is not displayed
• Trackbar ordering is not the same as the order in which they are coded
  • In fact is is apparently random, or pseudo-random – it is a logic, but it is not clear what that logic is

Additional issues are:

• Named windows containing only trackbars do not move with moveWindow()
• Named windows containing only trackbars do not resize with resizeWindow() – check this!!!
• Code execution pauses when a trackbar is adjusted
• Performance hits
  • When trackbars are in the same window as the image being adjusted

I have seen these issues consistently in Python. I am not sure if they all occur in C++ as I haven’t tested for them (yet).

Version info:

• OS X: High Sierra
• Python 3.7/3.9
• OpenCV:

Course Notes: Background removal

Preamble

Notes from Background Removal Like Zoom | OpenCV Python CVZone

Course notes: Tello basics

Preamble

Notes from Easy Programming of Tello Drone | Python OpenCV Object Tracking

Power cut = more peng rabert in Thai

Course notes: Drone Face Tracking

Preamble

Notes from

• Drone Face Tracking PID using OpenCV Pyhton | Tello (2020)
• Drone Face Tracking PID using OpenCV Pyhton | Tello (2020) p.2
• Drone Face Tracking PID using OpenCV Pyhton | Tello (2020) p.3

Course notes: Self driving Pi Car

Preamble

This project is poorly presented, with no real logical video ordering. However, it covers a lot of topics and the project starts out as an ultrasonic Arduino controlled obstacle avoidance robot and works up to an optical path following robot, and then a CNN lane following robot… a real jack of all trades!

Notes from:

• Easy Object Following Robot using Arduino and PixyCam. Github: https://github.com/murtazahassan/Object-Following-Robot. Uses PixyCam, which has its own processor. Similar to the mecanum robot (see Robot Car – Jetson Nano and Arduino). Uses mapfloat(), normalises speed, and uses moveRobot()
• How To Make A DIY LINE FOLLOWER using Arduino at Home – Different car, no code in video. Github: https://github.com/murtazahassan/lineFollowerPID
• How To Make A DIY Arduino Obstacle Avoiding Robot – Different robot, no code in video.. Github: https://github.com/murtazahassan/Obstacle-Avoding-Robot.  Horrible code, the ultrasonic function, obstacleDetected() is a bit of a mess. Uses moveRobot()
• DC Motor(L298) – Basic+Object Oriented | Raspberry Pi Tutorials for Beginners (2020)
• The Ultimate Raspberry Pi 4 Robot | Beginner Friendly (2020) [p1]
• How to run Robot Motors | Motor Module | Ultimate Raspberry Pi Robot (2020)[p2]
• Github: https://github.com/murtazahassan/Raspberry-Pi-Ultimate-Robot

Next the keyboard and joystick videos from the Playlist:

• SETUP TO PROJECT in 20 mins | Raspberry Pi Tutorials for Beginners (2020)
• The Ultimate Raspberry Pi 4 Robot | Beginner Friendly (2020) [p1]
• How to run Robot Motors | Motor Module | Ultimate Raspberry Pi Robot (2020)[p2]
• How to install OpenCV on Raspberry Pi 4 | Raspberry Pi Tutorials for Beginners (2020)
• How to get Keyboard Press in Python | Raspberry Pi Ultimate Robot (2020)[p3]
• How to run Joystick with Raspberry Pi | Raspberry Pi Ultimate Robot (2020)
• Object Detection Raspberry Pi using OpenCV Python | 2020 – meh – not done.

Then, finally

• Self Driving Car with Lane Detection using Raspberry Pi | OpenCV (2020) p.1
• Finding Lane | Self Driving Car with Lane Detection using Raspberry Pi (2020) p.2
• Warping Lane | Self Driving Car with Lane Detection using Raspberry Pi (2020) p.3
• Finding Lane Curve | Self Driving Car with Lane Detection using Raspberry Pi (2020) p.4
• Optimizing Curve Value | Self Driving Car with Lane Detection using Raspberry Pi (2020) p.5
• Hardware Implementation | Self Driving Car with Lane Detection using Raspberry Pi (2020) p.6

Additionally:

• OpenCV Raspberry Pi Self Driving Car using Neural Networks – Part1/3
• OpenCV Raspberry Pi Self Driving Car using Neural Networks – Part 2/3
• OpenCV Raspberry Pi Self Driving Car using Neural Networks – Part 3/3

These three videos are related to self driving simulation using Nvidia

• Self Driving Simulation using CNN NVIDIA’s MODEL Tensorflow (2020)
• Self Driving Simulation using CNN NVIDIA’s MODEL Tensorflow (2020) p.2
• Self Driving Simulation using CNN NVIDIA’s MODEL Tensorflow (2020) p.3
• Self Driving Simulation using CNN NVIDIA’s MODEL Tensorflow (2020) p.4
• Self Driving Simulation using CNN NVIDIA’s MODEL Tensorflow (2020) p.5
• Self Driving Simulation using CNN NVIDIA’s MODEL Tensorflow (2020) p.6
• Self Driving Simulation using CNN NVIDIA’s MODEL Tensorflow (2020) p.7
• Self Driving Simulation using CNN NVIDIA’s MODEL Tensorflow (2020) p.8

Course notes: Angle Finder

Preamble

Notes from

• Angle Finder using OpenCV Python (2020) p.1
• Angle Finder using OpenCV Python (2020) p.2
• Angle Finder using OpenCV Python (2020) p.3

60 FPS Webcam

Preamble

Notes from 60 FPS Webcam for Computer Vision | Is it worth it ?

Course notes: AI virtual mouse

Preamble

Notes from AI Virtual Mouse | OpenCV Python | Computer Vision

Course notes: Robotic Arm

Preamble

Notes from AI ROBOT ARM using Python Arduino OpenCV CVZone | Computer Vision

Course notes: Personal AI trainer

Preamble

Notes from Build a Personal AI Trainer | OpenCV Python 2021 | Computer Vision