If you are trying to display OpenCV image using matplotlib, use the code below.
import numpy as np
import cv2
import matplotlib.pyplot as plt
%matplotlib inline # if you are running this code in Jupyter notebook
# reads image 'opencv-logo.png' as grayscale
img = cv2.imread('/path_to_image/opencv-logo.png', 0)
plt.imshow(img, cmap='gray')
Top answer 1 of 9
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If you are trying to display OpenCV image using matplotlib, use the code below.
import numpy as np
import cv2
import matplotlib.pyplot as plt
%matplotlib inline # if you are running this code in Jupyter notebook
# reads image 'opencv-logo.png' as grayscale
img = cv2.imread('/path_to_image/opencv-logo.png', 0)
plt.imshow(img, cmap='gray')
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There is a tutorial on Getting Started with Images.
import numpy as np
import cv2
# Load an color image in grayscale
img = cv2.imread('/path_to_image/messi5.jpg',0)
# Show the image
cv2.imshow('image',img)
cv2.waitKey(0)
cv2.destroyAllWindows()
Use an absolute path to the image, and then you don't have any path problems.
Absolute and relative paths
OpenCV Error: (-215)size.width>0 && size.height>0 in function imshow
OpenCV
docs.opencv.org › 4.13.0 › d4 › da8 › group__imgcodecs.html
OpenCV: Image file reading and writing
The imread function loads an image from the specified file and returns OpenCV matrix. If the image cannot be read (because of a missing file, improper permissions, or unsupported/invalid format), the function returns an empty matrix.
I'm having this issue with OpenCV in Windows, imread returns "NoneType" I found this asked before and 'resolved' but I don't understand the fix.
most likely explanation is a typo in the image filename or path. opencv has pretty bad error reporting in that area.
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December 8, 2014Image processing in Rust
image provides basic imaging processing functions and methods for converting to and from image formats. imageproc An image processing library, based on the image library. More on reddit.com
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March 3, 2018Saving a 16 bit image. PNG. TIFF. Searched endlessly. Tried OpenCV/EmguCV.
I think you should be able to use the BitmapEx class from here: http://www.codeproject.com/Tips/745914/NET-Bitmaps-with-Full-bit-Support More on reddit.com
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September 17, 2016Why does Opencv read in images as BGR by default with imread?
~nobody knows~ More on reddit.com
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November 28, 201404:10
How To Read An Image In OpenCV Python - YouTube
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OpenCV Python Read And Write Images - YouTube
Load and Display Images with OpenCV (Python)
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How to Read, View and Export Images using OpenCV for Python // ...
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How to read a transparent PNG image using OpenCV - YouTube
How to Read, View and Export Images using OpenCV for ...
OpenCV
docs.opencv.org › 4.13.0 › db › deb › tutorial_display_image.html
OpenCV: Getting Started with Images
After reading in the image data will be stored in a cv::Mat object. ... OpenCV offers support for the image formats Windows bitmap (bmp), portable image formats (pbm, pgm, ppm) and Sun raster (sr, ras).
GeeksforGeeks
geeksforgeeks.org › python › reading-image-opencv-using-python
Reading and Displaying Images in Python using OpenCV - GeeksforGeeks
November 11, 2025 - OpenCV provides functions like cv2.imread() and cv2.imshow() that make it easy to load images from files and display them in a window.
TechVidvan
techvidvan.com › tutorials › read-display-save-image-with-opencv
Read, Display and Save Image with OpenCV - TechVidvan
April 15, 2023 - When reading images, OpenCV provides a set of functions that can read image files in various formats, such as JPEG, PNG, and BMP, and then convert them into a format that can be easily manipulated using the library’s image processing functions.
Medium
medium.com › @sasaniperera › opencv-basics-of-reading-and-visualizing-images-6abab99effcf
OpenCV: Basics of Reading and Visualizing Images | by Sasani Perera | Medium
June 22, 2023 - We can use Matplotlib to plot the images as well. import cv2 import matplotlib.pyplot as plt #using opencv to read an image im = cv2.imread("C:\\Users\Public\Pictures\TestImage.jpg") #visualising the plot plt.title("RGB Image") plt.imshow(im)
Medium
medium.com › analytics-vidhya › read-image-using-cv2-imread-opencv-python-idiot-developer-4b7401e76c20
Read Image using cv2.imread() — OpenCV Python — Idiot Developer | by Nikhil Tomar | Analytics Vidhya | Medium
January 23, 2024 - To use OpenCV in Python install the following libraries: ... To install the above libraries, use the following command. ... Here, we are going to import all the required libraries. ... To read an image cv2.imread() function is used.
DataFlair
data-flair.training › blogs › read-display-save-image-opencv
How to Read, Display and Save Image in OpenCV - Step-by-step Guide - DataFlair
April 28, 2026 - We’ll learn how to pick up an image file, show it on your screen, and even save a new version after making changes. To write code, you can use any editor of your choice. To read the contents of an image, we have a function cv2.imread().
OpenCV
opencv.org › home › news › read, display and write an image using opencv
Read, Display and Write an Image using OpenCV
March 28, 2025 - When working with images in OpenCV, it’s crucial to understand that OpenCV reads and processes color images in BGR (Blue-Green-Red) format rather than the more commonly used RGB (Red-Green-Blue) format used by most other computer vision libraries, such as Matplotlib, PIL (Pillow), TensorFlow, and PyTorch.
LearnOpenCV
learnopencv.com › home › image processing › read, display and write an image using opencv
Read, Display and Write an Image using OpenCV - LearnOpenCV
July 31, 2026 - The second argument is an optional flag that lets you specify how the image should be represented. OpenCV offers several options for this flag, but those that are most common include: ... The default value for flags is 1, which will read in the image as a Colored image.
PyImageSearch
pyimagesearch.com › home › blog › opencv load image (cv2.imread)
OpenCV Load Image (cv2.imread) - PyImageSearch
June 8, 2023 - In this tutorial, you learned how to load images using OpenCV and the cv2.imread function. ... OpenCV conveniently handles reading and writing a wide variety of image file formats (e.g., JPG, PNG, TIFF).
TutorialsPoint
tutorialspoint.com › opencv › opencv_reading_images.htm
OpenCV - Reading Images
The read() method of the Imgcodecs class is used to read an image using OpenCV.
GeeksforGeeks
geeksforgeeks.org › reading-image-opencv-using-python
Reading an image in OpenCV using Python - GeeksforGeeks
August 12, 2024 - Example #1 (Using OpenCV) : ... # Python code to read image import cv2 # To read image from disk, we use # cv2.imread function, in below method, img = cv2.imread("geeksforgeeks.png", cv2.IMREAD_COLOR) # Creating GUI window to display an image ...
LearnOpenCV
learnopencv.com › home › read an image in opencv ( python, c++ )
Read an Image in OpenCV ( Python, C++ ) | LearnOpenCV
October 23, 2025 - A transparent image has four channels — 3 for color, and one for transparency. These images can be read in OpenCV using the IMREAD_UNCHANGED flag.
EDUCBA
educba.com › home › software development › software development tutorials › programming languages tutorial › opencv read image
OpenCV read image | Complete Guide to OpenCV read image
April 6, 2023 - The OpenCV read image function works by decoding the source image that has been provided to the system in two assorted meat tricks, which consist of color channels data stored in the order of the color constituents that are present in the picture ...
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Jmgphd
jmgphd.com › courses › csc5930 › lecture-notes › opencv-images
Opening and Displaying Images with OpenCV – Jason M. Grant
Use OpenCV’s imread function to read in an image from a file. You can visit this page to see all of the supported image types. Images are stored in NumPy arrays, so all NumPy array operations are available when using the OpenCV library. OpenCV supports several options for reading in images, ...
Towards Data Science
towardsdatascience.com › home › data science › how to read images, video, webcam and screen in opencv - image analysis for beginners
How to read images, video, webcam and screen in OpenCV - image analysis for beginners | Towards Data Science
January 14, 2022 - In this part we'll install our dependencies and get OpenCV up and running. The goal is to have an image that we can use. We only need to install two dependencies: OpenCV and PIL (Python Image Library). Install them with: ... We'll start by simply reading an image from a file.
Note.nkmk.me
note.nkmk.me › home › python › opencv
Reading and saving image files with Python, OpenCV (imread, imwrite) | note.nkmk.me
October 15, 2022 - In Python and OpenCV, you can read (load) and write (save) image files with cv2.imread() and cv2.imwrite(). Images are read as NumPy array ndarray. This article describes the following contents. Read ...
GeeksforGeeks
geeksforgeeks.org › c++ › reading-and-displaying-an-image-in-opencv-using-c
Reading and Displaying an image in OpenCV using C++ - GeeksforGeeks
July 26, 2025 - imread(): This function is used to read images and takes the following 2 arguments: filename: The complete address of the image to be loaded is of type string.
MachineLearningMastery
machinelearningmastery.com › home › blog › how to read, write, display images in opencv and converting color spaces
How to Read, Write, Display Images in OpenCV and Converting Color Spaces - MachineLearningMastery.com
January 30, 2024 - Consequently, in an RGB image each pixel value is expressed by a triplet of intensity values. Let’s start by first importing the imread method from the OpenCV library in Python: ... Then proceed to read an RGB image.