Realtime Color Detection (Webcam) [8] | OpenCV Python Tutorials for Beginners 2020

In this video, we will learn how to detect any color in an image using the HSV space with the help of OpenCV Trackbars. We will also stack the images together to make the workflow smoother.

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[hafizmuhammadabdullahbhatt]

Quality work....Don't know why you have less views & likes???

[kumarshubham]

keep making videos!! u are a gr8 teacher

[woosal-kctr]

Awesome tutorial, I was just wondering if you could share the settings for the main colors (such as blue, red, green, etc.)

[nhutnguyen]

thank you so much, you give me a way so good

[werawutnunkesa]

Thank you brother, I love you so much.

[KidsEntertainment-nu]

This tutorial is very good. I know you are able to extract color, but i wondering that we know that it is orange and yellow color but how computers understand by adjusting trackbars that it is orange and yellow?. All i want to detect color and print color name.

[a.k_film_kingdom]

Fantastic tutorial. It was soo useful...

[jackyli]

Thanks, Murtaza, that 's cool! i like your tutorials...

[hafizmuhammadabdullahbhatt]

Cool, Why didn't you merge the trackbar....like min and max have separate tracks....one track should go from min to max???

[prabaldutta]

Hi! Could you explain the line: cv2.bitwise_and(img, img, mask=mask)? why are the inputs same and what is the role of the mask in the function

[rebeenali]

are going to use any object detection algorithm like Faster RCNN ?

[krzysztofkrol]

Really good video!
Could you please post a repository with the code?
I think the site from the description got migrated and i can't find any of the code there!
Would love to play with it myself!

[soumyajitchakraborty]

Can you explain why HSV was used there??

[heisenolf]

how to do a function when the object is a certain color?

[davemystic]

Why did we create the empty function?

[evagok]

I dont know why but i keep having errors. So strange but i couldn't figure out. MAybe the tutorial is old. I did everything the same but i keep having error.
cv2.error: OpenCV(4.8.1) error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'cv::imshow'

[MShandilya-zz]

Is anyone else getting this error like i tried searching alot but cant seem to find a way out of it :
cv2.error: OpenCV(4.7.0) error: (-215:Assertion failed) trackbar in function 'cv::getTrackbarPos'

[hafizmuhammadabdullahbhatt]

I'm receiving this error:
Traceback (most recent call last):
File "e:/Desktop Data/Programs/ColorDetector.py", line 38, in <module>
mask = cv2.inRange(imgHsv, lowerb, upper)
TypeError: Expected Ptr<cv::UMat> for argument 'lowerb'
What should I do?

[ishankrajpal]

why is my mask coming all black right from the start