OpenCV Python Tutorial For Beginners 3 - How to Read, Write, Show Images in OpenCV

[@hfe1833]

i like when he explain,very clear and easy to understand, not same the others tutorial theyre talking too fast that hard for me to absorb as beginner

[@bhavyakhushi8917]

after finding foe so long this is a very good tutorial for cv

[@Hakerman-ed6pe]

when i saw this IDE color my eyes were be like : Bravo six going dark

[@prathamn2700]

XD

[@sukumarroychowdhury4122]

From your voice, I know you are Sourav. Really thank you for such wonderful; presentation.

[@yesdone4993]

It's too good bro, such a clearcut explanation. All the best.

[@tarungupta6304]

Sir, your Explanation is very clear and the way is pretty good

[@ProgrammingKnowledge]

Install PyCharm ( Python IDE ) on Windows 10 + First Project - kzbin.info/www/bejne/mXnEaWibqZx_gZI Gist of code I used in this video - www.codebind.com/python/opencv-python-tutorial-beginners-read-write-show-images-opencv/

[@hasanjameel2148]

do you have idea how to use BRISK inside LSB steganography ? please answer

[@priyaupwanshi8063]

in the previous videos we install pips and python then why we use pyCharm instead python IDE ? Can you please share installation process of PyCharm ?

[@kumaramresh7905]

Surprised to see light themed ide..🤣🤣

[@rajarshimandal3235]

Anyone teaching, uses white ide

[@rabicode]

is it possible to take image/videos as user input after run the programe?

[@jn14624]

I figure that out ... It fails to make a copy when you use the (0) option and click on the (X) to close the windows, but if instead you set the number of milliseconds to 5000. It makes a copy right after it closes! In any case this is a nice tutorial, man. Working on a "neighborhood speed detector" (things are really crazy with lunatics speeding thru my street here and this is a nice way to cooperate with law enforcement)!

[@h0difaem104]

Thank you so much for this tutorial , And want to ask if i can use spyder ide instead of pycharm without having a trouble following your tutorial.

[@tarjunrao8823]

[ WARN:0@0.034] global loadsave.cpp:248 cv::findDecoder imread_('abd.jpg'): can't open/read file: check file path/integrity i got this kind of error plzz so;ve my issue

[@mahnoorsakhawat9087]

What is meant by destroying a window? What exactly does the command destroyAllwindows does?

[@shrutivaidya255]

@programmingKnowledge sir I'm getting error code 1 , saying cv2 has no attribute as imread. Please help to resolve this and my image isn't getting displayed.

[@mounahaadi]

At 15:37, It could be better if you explain why k = 27 only, and in elif condition what does ord('s') exactly, means and what is the functionality... (for a beginner it becomes quite difficult to understand) apart from these the video and teaching quality is really good...

[@_i.a.m_3664]

Your video gave me hope! It was systematic and so easy to understand. Thank you so much for uploading 😁

[@sqbm7329]

no one can teach this way man

[@howfar2157]

very nice video.. you have increased my confidence to learn on my own... :)

[@jetpix]

Thankyou Sir, Your Tutorial is very understandable

[@Parulmittal-wk3mp]

hey cv2.imshow() is not working in jupyter and kernel got crashed. could you suggest me some solution for this, that would be very helpful.

[@shankarwarudkar7469]

I have text file which contain the image co ordinates so how to read that co ordinates and display the image from them? pls help

[@ericosterlund]

hey mate, thanks for all the videos. Im having a problem for the imread, i have all the updated packages: numpy 1.18.2 1.18.2 opencv-contrib-python 4.2.0.34 4.2.0.34 opencv-contrib-python-headless 4.2.0.34 4.2.0.34 opencv-python 4.2.0.34 4.2.0.34 pip 20.0.2 20.0.2 setuptools 46.1.3 46.1.3 code: import cv2 img = cv2.imread('lena.jpg', 0) print(img) but when i run it, i still get None. I have the lane.jpg in my project folder. What could be the problem, i have spent 3 hours trying to troubleshoot this :'''''''(

[@ericosterlund]

google search: "OpenCV does not support Python 3.8, According to official docs, Python version 3.7 is the highest version that is supported."

[@interesantestuff1999]

@@ericosterlund Thnx, was also stuck. Seems like Python 3.7.3 doesn't support it either.

[@mchandran9652]

Dont cry brh, reinstall python.

[@damnitnabit1070]

@@ericosterlund working fine for me on python 3.8.3

[@techyaakash2392]

Thanks for the amazing series of opencv ❤❤

[@sarikamishra7051]

from github it was downloaded as zip folder. how will i extract images from it

[@prathamn2700]

Watch in 1.25x speed. Awesome series btw.

[@bigjoe6504]

my cv2.imread keeps returning as none. the path is correct, I dont know what to do, btw im using vscode.

[@harshitgupta7496]

same goes for pycharm

[@sakshibhagwat4794]

Hello, i m using your video for my project but I have sum doubt... I have error for opencv. It's given AttributeError for cv2.imread. so what can I do??

[@jeffcueto]

Hi, i would like to know how to hide or desable the pointer mouse when i use fullscreen window in OpenCV

[@RC2V6]

I imported an black and white image from a folder, and after reading and applying a threshold filter, i want to read the new threshold image generated instead of the original one i opened. How do i do this? Every time i try to read the thresholded image it reads the original BW imported. If you could help me, would be just awesome. Thanks!

[@sagihaviv5675]

sir how to make it read and extract only the word i want example in the image has "hello world" but i want to print only "world" in a text file

[@georgepescod3676]

Great video. Q: if I use 27, I can press basically any button and the window gets closed. Not just with the escape button. Is that ok?

[@marine50301]

Hey can anyone tell me either the image will be shown in mobile if all the codes is proper?

[@nabiltech1366]

Hello sir.I liked your video🙏.But i have question.What should i do if i want to use sublime text 3 instead of pycharm?🙋

[@hamzaasghar4845]

i have the same question, help please :D

[@joaosalomao5289]

@@hamzaasghar4845 So, do I. If anyone could help us, it would be really good

[@harshbarvaliya3529]

Good video. , In understandable language

[@didiruhyadi4798]

Keep going my friend.

[@adityarana3722]

Beautiful tutorial sir

[@jeevanshrestha8888]

"Could not find a version that satisfies the requirement opencv-python (from versions: ) No matching distribution found for opencv-python" I am getting this error while installing opencv in pycharm

[@shingchan4766]

according to the link here : stackoverflow.com/questions/47390692/error-while-installing-cv2-in-pycharm-python-3-5-3 I try to upgrade the pip "pip install --upgrade pip" from the python command prompt. Then go back to pycharm and install opencv-python. my pip version is 19.3.1 my opencv-python version is 4.1.2.30 I hope this help

[@satyambhargav9661]

you just need to update your pip in your pycharm for duing that you just need to double click on pip in project interpreter now before clicking on install package just check the box of specify version and then click install package, now do the same step for setuptools(some time it will show some error but eventually it will update your pip & setuptools). now while adding opencv again check the box of specify version

[@ramanmishra2013]

try installing numpy before opencv it helped me

[@xala973]

@@satyambhargav9661 thanks! that worked for me. finally

[@ekoziko9111]

@@satyambhargav9661 Worked great thanks!

[@ajinzrathod]

How can I set ctrl + s to save image instead of only S

[@akhileshdhindsa8830]

I don't think u can..in ord() method you can pass only a character.

[@Chiller-wx6gp]

really well explained sir 🙏

[@kushagra4379]

In pycharm Id I will try to installation of opencv that shows the error like"Error occurred when installing package " also it is showing " Could not find a version that satisfies the requirement opencv-python (from versions: ) No matching distribution found for opencv-python"". please help me

[@malak4542]

I have the same problem

[@kushagra4379]

@@malak4542 I had the same problem, what it did was first upgrading pip using pip install --upgrade pip. then I opened C:\Users\kusha\PycharmProjects\opencv\venv\Scripts> where kusha is my username. you can use cd command to reach this location. then type python -m pip install -upgrade pip and wait for the operation. then try to install the package from pycharm. I searched this comment of mine, I had commented this a year back, hope it helps

[@lakshmitejaswi7832]

will we crop a image at specific region will the image pixel or intensity changes? when i am cropping i am getting blur images

[@ssgoh4968]

Super good tutor. Thank you

[@Praveenkumar-pm9ss]

how to get two consecutive frame of video, so that we can get similarity between two frames continuosly on video

[@FunnyPantsTV124]

how would i go about displaying an image randomly from a folder? I've only been able to get my code to output filenames instead of displaying them

[@tisick8448]

Very nice video.. helped me

[@rajeshkumar2782]

Really Helpful in 2021

[@manishjadhav6685]

thanks man..am searching for path reading ... so that i can import the image using path directly

[@sheheryartanveer6619]

How can ye import Datasets of images ?

[@manjuhm7952]

Brother if you press any key instead of "esc and s" key window is closing.if possible check it once and guide me

[@namandhamani9405]

I am getting cv2.cv2 has no attribute what should i do

[@anandraj-xj5ge]

I'm getting a error while installation if opencv-python

[@rahulshukla5033]

operating system ?

[@anandraj-xj5ge]

@@rahulshukla5033 windows

[@rahulshukla5033]

can you paste the error

[@satvoholic8300]

@@rahulshukla5033 i am getting this error : Collecting opencv-python Could not find a version that satisfies the requirement opencv-python (from versions: ) No matching distribution found for opencv-python

[@Abdullah57561]

@@satvoholic8300 I got the same Erorr

[@suye87]

Excellent video

[@ramananallabelli494]

Thank you so much☺☺☺☺☺☺☺☺

[@naitikdalwadi1793]

I am using IDLE for OpenCV. In this, I do not need to write cv2.waitKey(0) for the image's continuous appearance. It is by default appears for infinite time. So, is there any other function, which works the same as waitKey function?

[@JiseonKim]

Should I install python again if I want to use pycharm?

[@idlconferencecentreknust6648]

No

[@t-macpie1410]

use Visual Studio Code, got error but code run fine. (can't keep it like this it may cause confusion later) switch to Pycharm can't even install opencv-python error try upgrade pip. error a long error. try install opencv ...successfully. when it works in a wildcard situation make me really paranoid. it is like when 1+1 isn't equal 2 and nothing make any sense at all. =.=

[@ericosterlund]

lolololol same! i mean... after doing a bunch of the aboves xP

[@chwa_shin]

Thank you for your excellent video 😊☺️

[@DarshanGhorpade7]

Hey how to apply thickening on a binary image in opencv

[@shubhamsharma-px5fu]

when i'am running code then image is not showing but matrix or array is showing

[@Criegrrunov]

To anyone getting a Non-zero exit code (1) error, try using an older version of Python as a project interpreter, as far as I know, Python 3.7 and more recent versions do not work with OpenCV yet, I am currently using Python 3.6 and it works normally.

[@bismakhalid7032]

I've installed python 3.8 should I uninstall this version? Cuz I'm getting the same error

[@muhammadsafiullah8428]

Thank you for uploading this tutorial for free.

[@akshatagupta9165]

Error:Non-zero exit code (1)

[@Shreemilk]

select existing interpreter manually

[@sanjayreddyj3276]

@@Shreemilk how to manually do it

[@kushagra4379]

i had the same problem, what it did was first upgrading pip using pip install --upgrade pip. then I opened C:\Users\kusha\PycharmProjects\opencv\venv\Scripts> where kusha is my username. you can use cd command to reach this location. then type python -m pip install -upgrade pip and wait for the operation. then try to install the package from pycharm

[@nikhilpatro5905]

@@kushagra4379 thank you so much...btw can you please explain what went wrong before?

[@kushagra4379]

@@nikhilpatro5905 first tell, did the process work perfectly or not?

[@srikrithibharadwaj6779]

Clear and perfect explanation. Thank You so much for this wonderful session Sir 🙏🏻👍🏻👌🏻

[@dileepgowda4859]

In pycharm Id I will try to installation of opencv that shows the error like"Error occurred when installing package ".My python version is 3.8 plz help me

[@kushagra4379]

i had the same problem, what it did was first upgrading pip using pip install --upgrade pip. then I opened C:\Users\kusha\PycharmProjects\opencv\venv\Scripts> where kusha is my username. you can use cd command to reach this location. then type python -m pip install -upgrade pip and wait for the operation. then try to install the package from pycharm. if the problem persists then contact me

[@OnlyFood-i5l]

What is numpy.core multarray fails to import erro

[@jn14624]

imwrite() hangs and i doesn't create a copy?

[@jijobuje]

What is the point of k==27? I couldn't understand that.

[@jijobuje]

I've learned. 27 means ESC in cv2 language and for example 32 for space or even 2490368 for up key. Every key has a number.

[@unemployedcse3514]

Awesome bro 💞

[@aprameyamandal4346]

16:03 If I press any key its going to disappear

[@davidhermawan942]

is there anyone to help me. When I tried to press except 'esc' & 's', the image was also closed or destroy all windows. my question is how if we press except 'esc' and 's' then the image is not closed. I tried using 'else' in condition function after 'elif' but it could'nt work.

[@tanmays9653]

Sir in k == 27: whatever I type the key in keyboard other than 's' it destroys the window. Can you tell me why?

[@devenderchaudhary7962]

Facing the same situation, please let know if any body know the reason.

[@davidhermawan942]

I had the same problem. how it could hapen too

[@imaparna17]

I want to know that without using if else statement if I press esc key then also we can exit from the image. so why you are using this statement.

[@TheQuickUplifts]

This might be depending on the IDLE you're using. Generally, pressing escape doesn't just work.

[@imaparna17]

@@TheQuickUplifts ok thanks

[@shwetachaudhary8265]

In old version +is not opening why?

[@anujrawat3626]

how does k==27 means ESC?

[@shivanmohammed9025]

Print (' I salute you ')

[@roiinbar907]

Got an error while trying to imshow, the error is: cv2.error: OpenCV(4.1.2) C:\projects\opencv-python\opencv\modules\highgui\src\window.cpp:651: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Cocoa support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function 'cvShowImage' I would appreciate any help.

[@someoneneedsbeer2994]

Dont copy the file into the project, use img = cv.imread('C:/Users/user/Desktop/opencv-master/opencv-master/samples/data/lena.jpg', 1) instead. Watch out for / and \. U have to use an / and not a \ for a new directory Then u use: cv.imshow('Test', img) There we go :) cv.imwrite('C:/Users/user/Desktop/opencv-master/opencv-master/samples/data/lena_copy.png', img) for the imwrite process!

[@humayunnasir6261]

Good Video. Thanks Alot.

[@iamodhay]

Please use dark theme. It would help eyes to watch your videos for a longer time. 👍

[@BFnotes]

it would be better idea to show us how to install PyChram because i'm messing with too much options

[@CGRB]

Awesome tutorials

[@hanafizahanafi2475]

Thank u so much for the teaching. Help me a lot

[@RaghunathTambde]

I just changed the file path, and got an error on imshow, I really don't understand what is going on there, if it was something about path then it should have returned None, help me Senpai

[@codeaxen]

Great Tutorials ProgrammingKnowledge Thanks ...am Looking to it Python made Easy

[@Quiet_Fox7]

Thank you!

[@harsh_dn]

The image isn't loading, a gray window appears and blue circle is rotating continuously Help please

[@rustamtemirov3156]

Hey man, what does "27:" mean?

[@vorpalblade]

27 is the escape key.

[@Dentechnocollection]

ASCII equivalent of ESC key

[@SaifaldeenSAH]

Great! Please continue

[@techtalk668]

Nice work brother thanks

[@adityagonella8383]

why always value of 27 is taken??

[@jatingarg7383]

When I tried to install open CV package on pycharm it showing error, what I have to do now

[@JaikishanJaikumar]

@@ousmancamara2870 yeah ur right man. even i faced same problem

[@japanrock100]

im lost, have i download the opencv on my computer?, cause i have follow all your videos but i cant find the opencv on my computer help!

[@yobro7051]

He did not show how to download open cv on pycharm .

[@nikaguladishvili5699]

@@yobro7051 you dont download it on pychar,its already there,you just have to install it in your project via import

[@aleenarao8499]

I don't clear where you open open cv

[@oKeFoi]

'cv2' has no 'imread' member

[@rtr195807]

many thanks for your work!

[@himanshushekhar26]

Thanks for this great tutorial

[@vic_dpewang9079]

I noticed that the imported image had to be under same level as the py flie, or the imread not gonna work

[@agatafilipczak1063]

thank you! that was helpful!

[@rickmeister2662]

It can does have to be. I have my images in a seperate folder. As long as you write the correct path to the image it should work fine.

[@ClevergunsYT]

Nice

[@rachadlakis1]

THank you :)