Python OpenCV - haveImageWriter() function Last Updated : 03 Jan, 2023 Comments Improve Suggest changes Like Article Like Report In this article, we are going to learn about the haveImageWriter() function of the OpenCV library. haveImageWriter() function Sometimes we need to detect if the specified image file is being correctly written or not before continuing further, In such a case we can use OpenCV which helps us to process images and videos to identify objects. When openCV is integrated with methods like the haveImageWriter() function. It helps us to check whether specified images can be encoded or written successfully or not. below is the syntax of the haveImageWriter function. Syntax: cv.haveImageWriter(filename) Parameters: filename: Filename of the image. Return: True, if specified image written successfully otherwise it returns False. Example 1: We will use the following image extension in our code and check whether it can be read correctly or not. Any image file with extension jpg, png, and jpeg will return True. Python3 # Import the library OpenCV import cv2 # Use haveImageWriter() function to check # provided image file can be encoded or not return_val = cv2.haveImageWriter("gfg.png") # Print the returned value print(return_val) Output: TrueExample 2: Any image file with an extension with a GIF will return False. Python3 # Import the library OpenCV import cv2 # Use haveImageWriter() function to check # provided image file can be encoded or not return_val = cv2.haveImageWriter("apple.gif") # Print the returned value print(return_val) Output: FalseExample 3: Any image file with extensions other than jpg, png, and jpeg will return False. Python3 # Import the library OpenCV import cv2 # Use haveImageWriter() function to check # provided image file can be encoded or not return_val = cv2.haveImageWriter("apple.mp4") # Print the returned value print(return_val) Output: False Comment More infoAdvertise with us Next Article Python OpenCV - haveImageWriter() function V vin8rai Follow Improve Article Tags : Python OpenCV Python-OpenCV Practice Tags : python Similar Reads Python OpenCV - haveImageReader() function In this article, we are going to learn about the haveImageReader() function of the OpenCV library. The haveImageReader() function is used to check whether specified images can be decoded or read successfully by OpenCV or not. Sometimes we need to detect if the specified image file is being correctl 1 min read Python OpenCV - imencode() Function Python OpenCV imencode() function converts (encodes) image formats into streaming data and stores it in-memory cache. 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