OpenCV Python Tutorial #6 - Corner Detection

Welcome to another OpenCV tutorial! In this OpenCV video, we'll be talking about corner detection. The point is to not just show you the corner detection, but to also introduce some of the interesting algorithms that OpenCV has built in. In this video, we'll only need 3-4 lines of code to find all the corners in an image within OpenCV.
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📄 Relevant Documentation: opencv-python-tutroals.readth...
📝 Code For This Series: github.com/techwithtim/OpenCV...
🔍 Playlist: • OpenCV Python Tutorials
⭐️ Timestamps ⭐️
00:00 | Introduction
01:37 | Corner detection
09:42 | Drawing corners
15:04 | Drawing lines between corners
18:35 | Outro
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⭐️ Tags ⭐️
- Corner detection in OpenCV
- Corners OpenCV
- Python
- Computer vision
- Cameras and video capture
⭐️ Hashtags ⭐️
#OpenCV #Python #CameraCapture

[@LyingParachute]

Hey Tim. After watching your several videos I noticed, that you struggle breathing while you talk. My girlfriend is a speech therapist and she said that going to this kind of specialist would make your life easier. You should consider implementing simple breathing exercises to prevent larynx disease. It's important, becouse you talk a lot. Thanks a lot for making courses and tutorials, they're great! :)

[@cjay9615]

Don't stop making these videos, some of the best python tutorials on the whole of youtube!!!

[@Joker4funify]

Hi Tim! It's great that you continue this series. Please continue it, don't ditch it:) P.S: I'm studying CV at my uni and your tutorials are just gold! Please, continue them. You are amazing, I'm watching you since 2019.

[@daymaker_bybit]

Thank you Tim. You're so good as a teacher. Everything is clear and so fun to learn. Best wishes!

[@breathemath4757]

Just in case you're not a fan of the map function, try: color = [int(x) for x in np.random.randint(0, 255, size=3)]

[@youhadayoub9567]

Thank you a lot, I m really injoying your lessons , thank u for the simplicity.

[@faizalimuhammadzoda4731]

This is absolutely amazing. Greetings from Asia.

[@bongvatana6803]

Love this tutorial

[@mrphatmanzach]

Instead of the map(lambda... for the np.random.randint you can also tuple a comprehension for the function. color = tuple(int(x) for x in np.random.randint()) Great video, love your channel!

[@29namankumar29]

Great video Tim👌✌️

[@JM_Tushe]

That's pretty cool, thank you!

[@vanchhitdubey]

Just wanted to tell you: you are amazing.

[@priyangshu7767]

Love your work

[@davidjack5876]

just wanted to leave this here: "good features to track" was the name of the paper publishing this improved corner detection method

[@PeterPkp123]

I love your videos

[@learnwithnawf246]

Thank you tim

[@pythonSefer]

Hi Tim I just wanted to suggest a video idea for you: Make a tutorial about the vim text editor

[@greenmug6436]

just type vimtutor in the terminal

[@journalist272]

Good job man

[@jollokim1948]

looking forward to the next video 😏

[@BananaLassi]

loved it

[@DavidDanosTech]

Nice !!!!

[@fionanathanson6580]

Nice video 👍

[@gustavojuantorena]

Great!

[@petr4720]

Top video

[@syedazzamzafar596]

@Tech With Tim The top right corner is left out. there is no line going or emerging from that corner.

[@standingpad]

Will there be a image denoiser tutorial?

[@cagndurmus2387]

when ı enter the link which is called Relevant Documentation , it says that the page is abondoned . Do you have have a new link of it?

[@NoahPeeters]

Could you make a video on image alignment using openCV?

[@numo6144]

you can simply write corners = list(map(np.ravel, corners))

[@numo6144]

and also rc = tuple(map(int, np.random.randint(0, 255, size=3)))

[@unbox3346]

I was feeling first before refreshing page

[@georgegu3374]

on video cam, always set a fixed white-balance like 5500k. otherwise the color on captured image is changing with ambiant light. if you with greyscale, it doesn't matter

[@user-yp9mh9wc9w]

@techwithtim the python documentation in the description is not working are there any other websites for that?

[@malek3764]

Hey Tim, I think you forgot to add the "OpenCV Python Tutorial #5 - Colors and Color Detection" video to this playlist

[@MrHellmeowmix]

The link to the documentation is "abandonded", do you know where I could find that information? I've tried a few google searches but I don't think I'm finding the right ones

[@user-ih4ho1wh5h]

I am a little confused with the line 19 at 19:59. Why did you use lambda x: int(x) instead of just a regular int(x). I don't use lambdas a lot so I'm wondering if I'm missing something here.

[@TechWithTim]

Oh good point! I could have actually just passed “int” as the function

[@keyaanminhas1199]

When are we learning about object detection from images

[@sitpainghtun5367]

Could you explain me a little more about second for loop ( for j in range(i+1), corners) )

[@tusharikajoshi8410]

it's for all the remaining corners. like, suppose i gives the 1st corner, so j will allow hold the value of all the other remaining corners, one by one, so that we can draw line from the 1st corner to every other corner. I am bad at explaining but I hope it helps.

[@maliklao8917]

can you do a program about scanner like MFL tank floor scanner in python

[@Ambiens]

I've just watched the 7th part and now 6th is the latest. Accidentally published?

[@TechWithTim]

yep lol

[@aayushpaswan6826]

@@TechWithTim nice!!

[@senahugtfl7789]

hi tim!it gives me the error like that: size.width>0 && size.height>0 in function 'cv::imshow' Could you help me please?

[@itfather]

Hello Tim, could you please make a video with opencv OCR for the next video? Like if you support this idea

[@kesiamakapele3454]

Hey dude,can you make screen recorded for android and can record internal audio

[@yasthirdhewnarian6531]

In Sublime Text, how exactly are you able to view the package methods ? Mine doesn't display that

[@sokainabn6764]

he's using Kite, an auto-complete plugin

[@Aditya-cw7rd]

can you please make a step by step guide on how to start freelance as only python programming on fiverr or other?

[@erfansadeghinezhad9780]

😍😍😍😍😍😍

[@jyothishmohan5613]

cv2.imread('assets/chessboard.png', 0) will give a grey scale image..I Think

[@oliviervanluijk4133]

0 is grayscale, 1 is color

[@vishnuagrahari5153]

Documentation link is not working please update it

[@manas1743]

Can someone again link the documentation. The link in the description says that the project is moved. Even the name of documentation would be enough for a google search.

[@ankitpatil3490]

I'm looking for it to

[@manas1743]

@@ankitpatil3490 Ok, I found it, would sen the link once I open my laptop

[@ankitpatil3490]

ok thanks.

[@irfanzafar9506]

@@manas1743 Kindly send me also . Thanks in advance for the favour.

[@vinamis]

lambda must be in lowercase vs Lambda Tx Twt

[@Bbdu75yg]

can't access the documentation from the video ://

[@pythonenthusiast9292]

unable to download opencv man.. I downlosaded from pip install and all other mrthods said by tim . I tried diffrent youtube videios but im unable to import the library in my IDE. any help would be appreciated guys. thanks

[@adityak1231]

Can you import it in your Terminal/cmd ?

[@pythonenthusiast9292]

@@adityak1231 no ! It shows there also that no module found

[@pythonenthusiast9292]

@@adityak1231 and when I reinstall the opencv it shows requirement satisfied.. I'm so confused

[@adityak1231]

Try upgrading pip to the latest version and reinstalling it

[@pythonenthusiast9292]

@@adityak1231 I did try that, still nothing

[@piranavanr9096]

I don't get any lines i don't know where I don't mistake any one tell me pls 🙏

[@rayaanibrahim4808]

yay 5th

[@sanduchicu7545]

901 view, 101 like :)

[@prasannan-robots]

This time im not first im 9th

[@Jdeadevil]

The complexity of the second half of this video is making me swear under my breath. I've met my intellectual limit, I am legitimately too stupid to understand the part where you put lines between each corner.

[@coolghoul9]

is it boring or you dont understand it, 1min later you try to explain boring hypotenuse

[@saucecircuit9992]

Smart guy but terrible teacher