Some suggestions are: Python - Having Trouble Opening a File With Spaces, How to Clear All Variables in the Middle of a Python Script, How to Get the Return Value from a Thread in Python, I Wrote This Code to Take in 5 Grades Take the Average and Display a Message Based on the Average, It Is Acting Up, Pycharm Not Finding Anaconda Python, Giving "Can't Open File 'Python': [Errno 2] No Such File or Directory? To read an image using OpenCV in Python, use the cv2.imread () method. This is generally used for loading the image efficiently from the internet. cv2 read image from bytes. A grayscale image means that each pixel will only have one channel with values between 0 to 255. We will look at how to turn an image into grayscale. Syntax: cv2.imread (path, flag) Parameters: Is it possible to hide or delete the new Toolbar in 13.1? Python cv2.imdecode () function is used to read image data from a memory cache and convert it into image format. size - The image size. CGAC2022 Day 10: Help Santa sort presents! To get the shape of this numpy.ndarray use the shape function. All three types of flags are described below: The method returns an image that is loaded from the specified filesystem. The cv2.imread() method loads the image from the specified file path. The cv2.waitKey() function waits for the user to press any key. Code: #importing the module cv2 and numpy import cv2 import numpy as np #reading the image which is to. The complete code for turning an image to grayscale is : You can see that the dimension of this matrix is different from that of a colored image. Example 2: OpenCV cv2 - Read Image as Grey Scale. After reading and converting the image to a byte array let's apply this cv2.imdecode () function to the input image. Read Image using OpenCV Python . To read an image in Python cv2, we can take the following steps Load an image from a file. We will be representing this image as an array. To read an image in Python using OpenCV, use cv2.imread () function. OpenCV is a library of programming functions mainly aimed at real-time computer vision. Its default value is cv2.IMREAD_COLOR. OpenCV-Python is a library of Python bindings designed to solve computer vision problems. If you press any key in that time, the program continues. Was the ZX Spectrum used for number crunching? I created a 2x2 JPEG image to test this. cv2.imshow will not accept PIL Images. FREE Shipping on orders above $100! We are building the next-gen data science ecosystem https://www.analyticsvidhya.com, """ Image path representing the location of the image on the disk. If you want to convert RGB image to grayscale image, then this will be helpful. Connect and share knowledge within a single location that is structured and easy to search. I not work on lambda but It work on localhost. Python makes it easy to import images and play around with them. Examples of frauds discovered because someone tried to mimic a random sequence. Krunal Lathiya is an Information Technology Engineer. @BunpotDarawankul So you'd need to show the code that wrote the data into the file you are reading so we can see how it was compressed or encoded or created. If the image cannot be read (because of improper permissions, missing file, unsupported or invalid format), then the cv2.imread() method returns an empty matrix. The library is cross-platform and free for use under the open-source BSD license. Better way to check if an element only exists in one array. For instance, bgr color or grayscale. We then get the image in binary format by using the tobytes () method of this array. Such an image would start with: Yours does not. rev2022.12.9.43105. The cv2.destroyAllWindows() function closes all open windows. Destroy all of the HighGUI windows. Its argument is the time in milliseconds. irwin combination square bunnings. In this example, we will write a numpy array as image using cv2.imwrite () function. OpenCV-Python is a library of Python bindings designed to solve computer vision problems. Analytics Vidhya is a community of Analytics and Data Science professionals. You can install the package using the pip command as below: To use OpenCV in your Python project you will need to import it. If0is passed, it waits indefinitely for a keystroke. Display the image in the specified window. Python Opencv Load Image from Byte String, provide format specific encoding parameters as described in the docs, available flags are here. https the daily buzz write for us huda beauty company profile kerastase laque couture hairspray aklot concert ukulele what is sustainability in the fashion industry . Add the following lines of code. If the image cannot be read (because of improper permissions. Python cv2 imread: How to Read Image in Python. For other supported depths, the compres. 13. If the image file is saved on disk, we can read it directly in binary format with open () method by using the b flag: with open('test.jpg', 'rb') as f: byte_im = f.read() Now the image will be read from disk to memory and is still in binary format. gstreamer python github, Hi Jetson Nano Gstreamer . Save my name, email, and website in this browser for the next time I comment. Test results: You do not need to save the buffer to a file. Method 3: Converting OpenCV Image into bytearray. Syntax: PIL.Image.frombytes (mode, size, data, decoder_name='raw', *args) Parameters: mode - The image mode. Reading an image in OpenCV using Python OpenCV | Saving an Image Arithmetic Operations on Images using OpenCV | Set-1 (Addition and Subtraction) Arithmetic Operations on Images using OpenCV | Set-2 (Bitwise Operations on Binary Images) Image Resizing using OpenCV | Python Image Processing in Python (Scaling, Rotating, Shifting and Edge Detection) import numpy as np import cv2 cv2.imread Reading an Image. It was initially developed by Intel and later supported by Willow Garage, then Itseez. What I'm trying to do is fairly simple when we're dealing with a local file, but the problem comes when I try to do this with a remote URL. import cv2 import numpy as np f = open ( 'image.jpg', 'rb' ) image_bytes = f.read () # b'\xff\xd8\xff\xe0\x00\x10.' decoded = cv2.imdecode (np.frombuffer (image_bytes, np.uint8), - 1 ) print ( 'opencv:\n', decoded) # your pillow code import io from pil import image image = np.array (image. The cv2.imread () method loads an image from the specified file. Why does the USA not have a constitutional court? Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Note, for images whose depth is CV_32F, only libtiff's SGILOG compression scheme is used. It worked well for me and helped me to continue my application build. Designed by Colorlib. python cv2.imdecode function is used to read image data from a memory cache and convert it into image format. References Convert OpenCV or PIL image to bytes. custom shopping baskets > kspace saturday school > cv2 read image from bytes. The image variable represents the image matrix in the form of numpy.ndarray class. In its simplest form, this function takes three arguments (mode, size, and unpacked pixel data). My image size is 650457 (297050) but buffer length I got is 121640. Get the Code! open (io.bytesio (image_bytes))) print ( 'pil:\n', See libtiff for integer constants corresponding to compression formats. So, the first we are going to convert image to base64 using python. def _get_image(self): # get a new image through a stream stream = io.bytesio() # get the image out of the camera with picamera.picamera() as camera: camera.start_preview() # have the camera do the resizing onboard and save as png See: Modes. The complete code for saving an image is: In this tutorial we covered how to read and manipulate images in Python using OpenCV. How to set a newcommand to be incompressible by justification? We are saving the grayscale image we created above. To read an image using OpenCV in Python, use the cv2.imread() method. The function imdecode reads an image from the specified buffer in the memory. Why dont you try to use imread() and other such function here instead of np.frombuffer? Syntax: cv2.imdecode (buf,flags) Parameters: buf - It is the image data received in bytes flags - It specifies the way in which image should be read. cv2.imread () method loads an image from the specified file. We can print it and see the RGB values. To work with OpenCV in Python, we have to install the opencv-python module. . But for a colored image, you need 3D array. Are the S&P 500 and Dow Jones Industrial Average securities? How can I open multiple files using "with open" in Python? This is an absurd question. Syntax: cv2.imshow (window_name, image) Parameters: window_name: A string representing the name of the window in which image to be displayed. Each pixel further contains a different number of channels. Try making the following changes to your code. 19/09/2022 lucidchart vs miro vs mural; Now the variable img will be a matrix of pixel values. Run the following code to import the OpenCV library. The complete code for displaying the image is: There are a lot of functionalities in OpenCV that allow you to manipulate an image. Wait for a pressed key. """. Read Multiple files from a directory: glob architectural engineering +965 512 88417 +965 512 88417 This is what I normally use to convert images stored in database to OpenCV images in Python. reshape(-1,1) In above code, we convert sparse vector to a python array by calling toArray method. To read an image cv2.imread() function is used. flag: It specifies how an image should be read. All Rights Reserved. I used cv2.imdecode and numpy.frombuffer. I have flask rest api that receive multipart/form-data as image and I want to use opencv to process it . Why would Henry want to close the breach? I will make some changes in code for you to try those functions. Step 4 : Apply yhe cv2.imdecode () method. For reading an image, use the imread () function in OpenCV. We will start by reading the 2 images to be stitched together. I have made some new changes to the answer, try using this code. Part of the pain with a python 3 port is disentangling where a string is a string and a string is really bytes. No, It's not an issue in Pillow. It enables object detection in images that has applications ranging from self driving cars to tumor detection in the field of medical science. kuwait oil company jobs 2022. cv2 read image from bytes . NumPy matmul Matrix Product of Two Arrays. Knowing how to read images in Python will enable you to do image processing and train machine learning models on image data. For a binary or grey scale image, 2D array is sufficient. Asking for help, clarification, or responding to other answers. For TIFF, use to specify the image compression scheme. My problem is I can't read image with cv2.imdecode. Thanks for contributing an answer to Stack Overflow! You can do division normalization in Python/OpenCV. image = cv2.imread(args['image']) From there, we will instruct OpenCV to go and find the image "floppy_disk.jpg", read it, and then store it in this variable "image". To read an image in Python cv2, we can take the following steps Load an image from a file. In the original format, this image consists of 7207 x 4801 pixels. import cv2 Read an Image You can use the function cv2.imread () to read images. I got this --> typeError: a bytes-like object is required, not 'str'. but be prepared to see strange colors because PIL uses RGB order while OpenCV expects BGR order, and interprets the data accordingly.. "/> When reading a color image file, OpenCV imread() reads as a, How to Convert Image to Base64 String in Python. import cv2 img = cv2.imread(r"brain.png") cv2.imshow("pic", img) cv2.waitkey(0) cv2.destroyAllWindows() ## Do not ever forget to add the waitkey or destroy all windows lines as shown above. Why is apparent power not measured in watts? OpenCV image to base64. So it is probably just the raw, unencoded pixels and you probably just need: Another clue is the size of your bytes buffer. To import it use the following line: To read an image using OpenCV, use the following line of code. Here is the tutorial: Understand tf. Load an image from a file: Mat img = imread (filename); If you read a jpg file, a 3 channel image is created by default. For this, we are going to use the OpenCV library. I already reshaped it but I it throw me an error --> Can't not reshape 121640 to height * width. imread and File Extensions. electric bike conversion near manchester +965 512 88417; can you install bluetooth in an older car. custom all over print pants; dupli-color flat black touch up paint Without knowing the details of your server it is hard to know why it isn't accepting the opencv encoded images. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Ready to optimize your JavaScript with Rust? To save an image after manipulation use the following line of code: Here, the first argument is the name you want to give to the file, the second argument is the variable that contains the image you want to save. If its size matches the height x width of your greyscale image (or 3x that if colour) it means your image is just pixel data, whereas you would expect a JPEG/PNG encoded image to be much smaller because it's compressed. To learn more, see our tips on writing great answers. Please, one thing to note here is that OpenCV is BGR, and Pillow is RGB. unsupported or invalid format), then the cv2.imread() method returns an empty matrix. cv2.imdecode () expects to decode a JPEG-encoded or PNG-encoded image. OpenCV refers to Open Source Computer Vision library aimed at computer vision and machine learning. The second argument is an optional flag that lets you specify how the image should be represented. The second argument of the cv2.imread () function is a flag to specify an image color format. Using the Python-OpenCV module, you can transform the image from color to black-white, from black-white to gray, or from RGB to Hue Saturation and Value. The window automatically fits the image size. In [0]: import matplotlib.pyplot as plt import numpy as np import cv2 In [1]: sample_image = cv2.imread ('image.jpg') img = cv2.cvtColor (sample_image,cv2.COLOR_BGR2RGB) plt.imshow (img) Out [1]: ii) Preprocessing the Image konoha watches naruto multiverse fanfiction To work with images in PIL you need to first import the Image module from the . How do I protect Python code from being read by users? In OpenCV, we can get the image size (width, height) as a tuple with the attribute shape of ndarray. Parameters: cv2.IMREAD_COLOR or 1: reads the image with RGB. encryption in transit and at rest; chateau south of france - airbnb; 2022 bronco sport manual; esi- common background ions; Slide Out Sidebar \Program Files\Tesseract-OCR\tesseract.exe' # read . Some of our partners may process your data as a part of their legitimate business interest without asking for consent. If the buffer is too short or contains invalid data, the function returns an empty matrix ( Mat::data ==NULL ). Each channel of each pixel has a value between 0 and 255. . Marko5280 (Mar 7 '18) edit When I try to execute mat = new Mat(HEIGHT, WIDTH, CvType.CV_8UC3, Still ); I get the message. Understand Image types and color channels are essential when working with the cv2 module in Python. import cv2 Read an Image You can use the function cv2.imread () to read images. Connecting three parallel LED strips to the same power supply. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Manage SettingsContinue with Recommended Cookies. Programming to Read images. By profession, he is a web developer with knowledge of multiple back-end platforms (e.g., PHP, Node.js, Python) and frontend JavaScript frameworks (e.g., Angular, React, and Vue). Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content. """, """ Reading the image and returning the image matrix """, """ Displays the image in a GUI window. How to read a single character from the user? Python cv2 module uses the numpy library to manipulate the images. software risk mitigation recommendations. The image has white, red, green and purple pixels. All of that gives us a total of 7207*4801*3 = 103,802,421numeric values contained within our image array. Its default value is cv2.IMREAD_COLOR. Do bracers of armor stack with magic armor enhancements and special abilities? To read an image cv2.imread() function is used. The following script captures an image from a webcam, encodes it as a JPG image, and then converts that data into a printable base64 encoding which can be used with your JSON: This could be extended to show how to convert it back to binary and then write the data to a test file to show that the conversion was successful: To get the image back as an image buffer (rather than JPG format) try: I want to start by getting your test case working, we will do this by using a lossless format with no compression so we are comparing apples to apples: This is not ideal since compression is desirable for moving around bytes, but it illustrates that there is nothing inherently wrong with your encoding. You have entered an incorrect email address! path:It is a string representing the path of the image to be read. Debian/Ubuntu - Is there a man page listing all the version codenames/numbers? # load the image from where the file is located and get the. There are probably some flags you might use to tune this. Thanks very much for posting this code snippet. What you see as an image is actually a 2D matrix for computer. Making statements based on opinion; back them up with references or personal experience. Here is one thing to note that I am assuming that you are working with BGR images. it only accepts numpy arrays. Streaming audio and video in sync for mp4 container. Footwear; Bags; Fragneances; Lingerie In this tutorial, we are going to focus on reading an image using the Python programming language. You can see from the output that the image is unchanged. Find centralized, trusted content and collaborate around the technologies you use most. So this is mean my image is already encoded right?? I have added the conversion from numpy.ndarray to cv2.cv.iplimage, so the script above will print: EDIT: As of latest numpy 1.18.5 +, the np.fromstring raise a warning, hence np.frombuffer shall be used in that place. Such an image would start with: the JPEG signature ff d8 ff or the PNG signature 89 50 4e 47 0d 0a 1a 0a Yours does not. This function is return none so what's wrong. Python OpenCV load image from byte string This is what I normally use to convert images stored in database to OpenCV images in Python. Let's do it ! That is it for the Python cv2 imread() method. Should I give a brutally honest feedback on course evaluations? In the above code, we first save the image in Numpy ndarray format to im_arr which is a one-dim Numpy array. To read and display image using OpenCV Python, you could use cv2.imread () for reading image to a variable and cv2.imshow () to display the image in a separate window. To import it use the following line: import cv2. import cv2 import numpy as np # create a videocapture object and read from input file # if the input is the camera, pass 0 instead of the video file name cap = cv2.videocapture ('chaplin.mp4') # check if camera opened successfully if (cap.isopened ()== false): print ("error opening video stream or file") # read until video is completed while So, first I must convert from byte [] to "ByteBuffer". OpenCV is an open-source computer vision and machine learning software library of programming functions mainly aimed at real-time computer vision. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. The order of color is BGR (blue, green, red). See cv::imread for the list of supported formats and flags description. Syntax: cv2.imread(path, flag) path: The path represents the location of the image on . The io module is a backport from python3 into python 2.7 to ease porting from 2 -> 3. A digital image is stored as a combination of pixels. flag: It specifies how an image should be read. Numpy log10 Return the base 10 logarithm of the input array, element-wise. If it a grayscale image, it has only one pixel, whereas a colored image contains three channels: red, green, and blue. Of course, you know what an image is. 2. In general cases, we read image using cv2.imread (), apply some transformations on . The statement image.shape returns a list with three values representing the height, width and number of channels. Since there is not much to be done with those variable types in python, unless the variables are converted to numpy arrays, I was wondering if there is a [fast] way to convert them to numpy arrays. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. To use OpenCV in your Python project you will need to import it. Example 2: Save Image using cv2 imwrite () - with Random Values. Basically, I'm trying to create a PIL image object from a file pulled from a URL. If the path is correct then an image matrix is returned, else nothing (None) is returned. We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. The consent submitted will only be used for data processing originating from this website. Reads an image from a buffer in memory. The cv2.imread() method loads the image from the specified file path. You will need the following: * GStreamer 0. Byte array to OpenCV image. OpenCV-Python is the library of Python bindings designed to solve computer vision problems. Author jdhao To read an image using OpenCV, use the following line of code. Can a prospective pilot be negated their certification because of too big/small hands? To use opencv-python in our project, we must import the cv2 module into the file. Wait for a pressed key. So here's how to do that for this kind of data: image = np.fromstring (im_str, np.uint8).reshape ( h, w, nb_planes ) (but yes you need to know your image properties) if your B and G channel is permuted, here's how to fix it: image = cv2.cvtColor (image, cv2.cv.CV_BGR2RGB) Share Improve this answer Follow answered Jan 30, 2015 at 12:18 Here's the syntax: imread (filename, flags) It takes two arguments: The first argument is the image name, which requires a fully qualified pathname to the file. Syntax - cv2.imread () The syntax of imread () function is cv2.imread (/complete/path/to/image,flag) First argument is complete path to the image along with the extension. Note If not added, open cv runs an infinite loop to open the image in a separate window. Should teachers encourage good students to help weaker ones? cv2.imdecode() expects to decode a JPEG-encoded or PNG-encoded image. For that, we will create a numpy array with three channels for Red, Green and Blue containing random values. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. PIL.Image.frombytes () Creates a copy of an image memory from pixel data in a buffer. Here, we are going to import all the required libraries. import numpy as np import cv2 from cv2 import cv # Load image as string from file/database fd = open ('foo.jpg') img_str = fd.read () fd.close () # CV2 nparr = np.fromstring (img_str, np.uint8) To use OpenCV in Python install the following libraries: To install the above libraries, use the following command. Syntax of cv2 .imread Example 1: OpenCV cv2 Read Color Image . neza wireless lavalier microphone. Would salt mines, lakes or flats be reasonably found in high, snowy elevations? In this array, we will have three 'channels' (layers) representing red, green, and blue. cv2.imshow () method is used to display an image in a window. base64 image to PIL Image. Second, we will compute the SIFT-keypoints and descriptors of the two images; and distances between every 2 descriptors of the two . When reading a color image file, OpenCV imread() reads as a Numpy array ndarray of row (height) x column (width) x color (3). Image processing involves performing some operations on an image, in order to get an enhanced image or to extract some useful information from it. We can think of Images in Python are numpy arrays, and using the cv2 module, we can modify . 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With the combination of red, green and blue in different proportions we can create any colour. Let me clarify the codes above. The image should be in the working directory or a full path of image should be given. The cv2.imread() method loads an image from the specified file. OpenCV-Python is a library of Python bindings designed to solve computer vision problems. There are three ways in which an image can be read. cv2 read image from bytes. I got --> TypeError: a bytes-like object is required, not '_io.StringIO', I think np.frombuffer expected a bytes object only. Is energy "equal" to the curvature of spacetime? NumPy gcd Returns the greatest common divisor of two numbers, NumPy amin Return the Minimum of Array Elements using Numpy, NumPy divmod Return the Element-wise Quotient and Remainder, A Complete Guide to NumPy real and NumPy imag, NumPy mod A Complete Guide to the Modulus Operator in Numpy, NumPy angle Returns the angle of a Complex argument. Read the input; Convert to grayscale; Apply GaussianBlur; Divide the grayscale image by the blurred image; Save the output; Input: import cv2 import numpy as np # read the image img = cv2.imread('equation.png') # convert to gray gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY) # blur smooth = cv2 . Press ESC key and the window is removed automatically. The following code will assist you in solving the problem. img = cv2.imread ('image_path') Now the variable img will be a matrix of pixel values. def read_string(): with open("tux.jpg", "rb") as image: image_string = base64.b64encode(image.read()) return image_string I have used a local image "tux.jpg" so, you can use anything that has true image format. The function waits for specified milliseconds for any keyboard event. Python cv2 Image Size To get the proper size of an image, use numpy.shape property. imread () returns a 2D or 3D matrix based on the number of color channels present in the image. I can't read image with open-cv from bytes. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Python's built-in bytearray function allows us to convert arrays to byte arrays . Learn how your comment data is processed. Running this will show the video file being read (by the filesrc element), decoded (decodebin element) and sent to the Gstreamer equivalent of /dev/null (fakesink element). Syntax: cv2.imread(path, flag) flag: default value is cv2.IMREAD_COLOR. We and our partners use cookies to Store and/or access information on a device.We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development.An example of data being processed may be a unique identifier stored in a cookie. We can use the following value for the flag parameters in the cv2.imread() function. The solution for "python cv2 convert image to binary" can be found here. Irreducible representations of a product of two groups. Using the Python-OpenCV module, you can transform the image from color to black-white, from black-white to gray, or from RGB to Hue Saturation and Value. And also share the actual file you are reading - probably using Dropbox or Google Drive or some other binary file sharing service. To further explore OpenCV read its documentation. Understand Image types and color channels are essential when working with the cv2 module in Python.We can think of Images in Python are numpy arrays, and using the cv2 module, we can modify .. Example 3: OpenCV cv2 - Read Image with Transparency Channel. In this tutorial, we will learn how to read images in Python using the OpenCV library. So it is probably just the raw, unencoded pixels and you probably just need: img = np.array (imgBuffer).reshape ( (height,width)) OpenCV in python helps to process an image and apply various functions like resizing images, pixel manipulations, object detection, etc. -- pass np.asarray(frame) instead. multipart/form-data in body. The field of image processing is upcoming and advancing rapidly. Why is Singapore currently considered to be a dictatorial regime and a multi-party democracy by different publications? Introduction. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page. Understand Image types and color channels are essential when working with the cv2 module in Python. That might ease. Toggle navigation blanknyc dress down party shorts mac studio radiance primer ingredients. Pillow has never worked with io.StringIO, it works with io.BytesIO. Originally published at https://idiotdeveloper.com on June 3, 2021. We can pass the flag cv2.IMREAD_UNCHANGED to the cv2.imread() function. imread and Color Channels. Not the answer you're looking for? cv2 read image from bytes 19 Sep, 2022 . Example import cv2 img = cv2.imread("baseball.png", cv2.IMREAD_COLOR) cv2.imshow("baseball", img) cv2.waitKey(0) cv2.destroyAllWindows() Output Using the Python-OpenCV module, you can transform the image from color to black-white, from black-white to gray, or from RGB to Hue Saturation and Value. We will open an image using OpenCV (Open Source Computer Vision). The image we are using for this example is: To show the image using OpenCV use the following line: cv2.waitKey()is a keyboard binding function. OpenCV program in python to mask the given image by specifying the lower bounds and upper bounds then displaying the resulting image as the output on the screen using inRange() function. Syntax cv2.imread ( path, flag) Parameters path: It is a string representing the path of the image to be read. If the image cannot be read (because of missing file, improper permissions, unsupported or invalid format) then this method returns an empty matrix. # spacial dimensions such as the width, height and #no of channels. import numpy as np import cv2 as cv frame=np.zeros( (32,32,3), np.uint8) frame[16,0:31,:]=255 ret,buf=cv.imencode("toto.jpg",frame) bufjpg = bytearray(buf) fs = open("toto.jpg", "wb") fs.write(bufjpg) print (buf[0:15].tostring()) img=cv.imdecode(buf,cv.IMREAD_COLOR) cv.imshow("img",img) cv.waitKey(0) Are there conservative socialists in the US? 2022 ITCodar.com. This seems to work, although the channel order is BGR and not RGB as in PIL.Image. image = cv2.imdecode (image, cv2.IMREAD_COLOR) cv2.imshow ( "output.jpg", image) cv2.waitKey ( 0) You can see in the above code I am passing the input . Rather a better question to ask would be what is an image for a machine. OpenCV: Image file reading and writing. cv2 read image from bytes. (thresh, im_bw) = cv2.threshold(im_gray, 128, 255, cv2.THRESH_BINARY | cv2.THRESH_OTSU) Thank you for using DeclareCode; We hope you were able to resolve the issue.. 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