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Installing. Python has a library that handles images such as OpenCV and Pillow (PIL). GitHub Gist: instantly share code, notes, and snippets. from PIL import Image from resizeimage import resizeimage fd_img = open ('test-image. OK, I Understand 用python进行图像处理中分别用到过matplotlib. md img = cv2. array(PILImage), cv2. cv_im. PIL is a popular image processing package in Python. array(pil_image), cv2. imread, we could simplify this file # by writing # from scipy. There are four libraries that are usually used for loading images. jpg'). Although you import the library as PIL, you have to install it using. open(file) opencvImage = cv2. size, cv. fromarray taken from open source projects. We use cookies for various purposes including analytics. import cv2 filename = 'your_image. QueryFrame(capture) #SOMETHING GOES HERE TO TURN FRAME INTO IMAGE img = img. IPL_DEPTH_8U, 1) cv. COLOR_BGR2GRAY) So, now the variable “gray_image” will hold the gray-scale version of the input image. jpg' W = 1000. The libdmtx DLLs are included with the Windows Python wheels. image = cv2. The following is a look at the two more-popular libraries. CV2 is BGR. Since we want to convert our original image from the BGR color space to gray, we use the code COLOR_BGR2GRAY. uint8). Use the function cv2. img = cv2. Remove the width multiplier. Mat matrix ImageGrab returns a PIL image, but opencv expects a numpy array. This guide doesn’t introduce any new OpenCV functions you shouldn’t already be familiar with from the previous example, but we will include new packages os and os. pip install Pillow Use Hi, I load an jpeg file with scikit-image skimage. cvtColor(img,cv2. 1. import numpy import cv2 from PIL import Image # And then you need a PIL image to work with,  May 2, 2018 Hi everyone, I am working with Python and ia habe a problem with convert the format PIL to CV2, my code is: from PIL import Image import  PIL image to CV2 image. 2. With extensive examples, it explains the central Python packages you will need for working  import io import time import picamera from PIL import Image # Create the import cv2 import numpy as np from PIL import Image def  Jan 5, 2018 When we talk about image enhancement, this basically means that we want a new version of the image For this purpose, you can use the Python Imaging Library (PIL). OpenCV and PIL both have image processing tools such as: Image filters (blur, sharpen, etc. fromarray(OpenCV_data) 青画面の残念仕様になるので対策 import matplotlib. convert('RGB') data = pil_image. If you are about to ask a "how do I do this in python" question, please try r/learnpython, the Python discord, or the #python IRC channel on FreeNode. imwrite() ” with parameters as “the name of converted image” and the variable “gray_image” to which the converted image was stored: [crayon-5d41c1d5b9bbb215672090/] 資料來源: PIL Image to CV2 image. Use the copy method. imshow() (eg: cv2. second argument is our image. array ( pilImage ) matImage = cv . pilutil. format) fd_img. Pillow builds on this, adding more features and support for Python 3. imread(filename, cv2. PIL and cv2 both support general image processing, such as: Conversion between image types; Image transformation; Image filtering; PIL (Pillow) The Python Image Library. import numpy. cv2. PIL is the Python Imaging Library which provides the python interpreter with image editing capabilities. The module we use in this recipe to resize an image with Python is PIL. LABELS_URL is a JSON file that maps label indices to English descriptions of the ImageNet classes and IMG_URL can be any image you like. This is the shortest version I could find,saving/hiding an extra conversion: pil_image = PIL. open(stream) Pillow is a fork of the Python Imaging Library (PIL). # If it weren't for the different names of the first arguments of # ndimage. CaptureFromCAM(1) imgSize = cv. Image. imread(); Pillow  May 14, 2019 When the image file is read with the OpenCV function imread(), the order of import cv2 import numpy as np from PIL import Image im_cv  Mar 12, 2019 In this I'll try to explain how we can use OpenCV library and python to read and display image. preprocessing. But, the color scheme may get changed so you have to use cv2. cvtColor(image, cv2. PIL is a free library that adds image processing capabilities to your Python interpreter, supporting a range of image file formats such as PPM, PNG, JPEG, GIF, TIFF and BMP. Python Tkinter OpenCV PIL image resize to fit label I am trying to resize my webcam output to fit into the label but I couldn't really make it work. save ('test-image-contain. This image with the uniform gradient (from 100% white to 100% black) allows us to find out which pixels are used by each library. Image in Pillow (PIL). IMREAD_COLOR : Loads a color image. Draw. So here, I'm going to demonstrate some basic image blending functionality, just to provide a basis for this tutorial. Coming to image processing, OpenCV enables us to perform multiple operations on image, but in order to do that we need to read an image file as input, then we can perform the desired operation and we can save it. These libraries support the Python Image Library (PIL) to create content for the small displays. when I run th The Python Imaging Library, or PIL for short, is one of the core libraries for image manipulation in Python. resize with a height value of 1150 and width of 1350 pixels. import cv2 from PIL import Image import numpy as np import sys # PIL to openCV   Jan 1, 2018 To learn how to take screenshots with OpenCV and Python, just keep . In this tutorial, we shall the syntax of cv2. GetSize(cv. array(pil_image) Dan. asarray(PIL_data) OpenCV⇒PILは from PIL import Image PIL_data=Image. capture(stream, format='jpeg') # "Rewind" the stream to the beginning so we can read its content stream. reshape(rows,cols) I have just googled 'numpy array from PIL image', apparently you can also use img=np. pow (im, 0. If it’s in one of the If you did some operation to change the type from “uint8” to another data type, such as im3 or im4 in the example above, you need to convert back before creating the PIL image: pil_im = Image. jpg' )  Jul 11, 2019 Export and import CV2/Numpy images You can export and import cv2/numpy images was: from PIL import Image, ImageDraw, ImageFont. The code to do this step, and the resized output can be seen below. imshow('Demo 2 CV2 is OpenCV. We can use either Image module or the ImageOps module to achieve what we want. imshow(). resize() function. SetData(cv_img1, img1. time ()-last_time)) last_time = time. If image is grayscale, tuple Pillow (PIL fork) Imageはnumpy. The Image class comes from a package called pillow and is the format for passing images into torchvision. These include: Per-pixel manipulations, Masking and transparency handling, Image filtering, such as blurring, contouring, smoothing, or edge finding, Image enhancing, such as sharpening, adjusting brightness Create a display object given raw data. size img=np. line(). cvtColor does the trick for correcting the colour when converting between PIL and OpenCV Image formats via NumPy. size scanner = zbar. shape. Then, a call to cv2. where is a possibility. The image should be in the working directory or a full path of image should be given. Because humans can identify and understand what it means. They are extracted from open source Python projects. In this post, I describe how to convert numpy image or PIL Image object to binary data without saving the underlying image. png files from a . Victor Gau Keep It Simple and Stupid; then Just Do It! [Python] PIL: to/from OpenCV Image The following are code examples for showing how to use cv2. OK, I Understand Combine images into a video with Python 3 and OpenCv 3 Here, we will inspect a python script (named tk-img2video ) which will combine images into a video. COLOR_BGR2RGB) before plotting using plt. # cv2. io. img1 = img1. This is a lazy operation; this function identifies the file, but the file remains open and the actual image data is not read from the file until you try to process the data (or call the load() method). In order to load an image off of disk and display it using OpenCV, you first need to call the cv2. Other basic things you can do with image. urlopen(r'http://stackoverflow. Welcome to the second part of this 3 part series about stereo reconstruction. Library for loading image. Hey guys, been reading OpenCV for python and thought of posting a tutorial on Programming a Grayscale Image Convertor. PIL and cv2 both support general image processing, such as: Conversion between image types Hi, I load an jpeg file with scikit-image skimage. It is for a microscopy experiment with the idea being that the gui shows a low resolution live stream, but at the click of a button a high resolution image is taken. Simply take an image containing an rainbow, it is very easy to a human to identify to say “it a rainbow and it is a colorful object”. imread function, passing in the path to your image as the sole argument. open('Image. In this part of the tutorial, we are going to focus on how to write the necessary code implementation for recording and training the face recognition program using OpenCV's LBPH Face recognizer. tk-img2video: The Python Discord. 首发于《有三AI》【AI基础】OpenCV,PIL,Skimage你pick谁如何对图像进行处理是深度学习图像处理的基础,我们常常需要对图像进行读取、保存、缩放、裁剪、旋转、颜色转换等基本操作。 The flags is to specify the color type of a loaded image: Image properties include number of rows, columns and channels, type of image data, number of pixels etc. This is implemented using cv2 and Numpy  Jun 24, 2018 This tutorial was tested using Python version 2. You can create as many windows as you wish, but with different window names. BGR2RGB. Flip Image OpenCV Python October 7, 2016 Admin 2 Comments OpenCV provides the flip() function which allows for flipping an image or video frame horizontally, vertically, or both. The first two imports are for reading labels and an image from the internet. If you want to do more with image editing, be sure to checkout our article on how to watermark an image in Python We use cookies for various purposes including analytics. ImageTk import cv2 as cv from scipy. News about the dynamic, interpreted, interactive, object-oriented, extensible programming language Python. 6 import sys 7 import rospy 8 import cv2 9 from std_msgs. grab (bbox = (0, 40, 800, 640))) print ('loop took {} seconds'. imread("plane. cvtColor(numpy. Also, if you are getting errors with CV2, it may be because it doesn't like  2017年10月27日 OpenCV转换成PIL. By voting up you can indicate which examples are most useful and appropriate. imshow() to display an image in a window. open(fp, mode='r')¶. O'Reillyの「ゼロから作るDeep Learning」の3章。 MNIST画像(手書き数字認識のサンプル画像)を表示するのにPILを使うよって。 PIL(Python Image Library)についてはこちらなどご参照ください http The first two imports are for reading labels and an image from the internet. fromarray ( npImage ) I get cv not defined as I have openCV3 installed which is available to me as cv2 module. CascadeClassifier(r"C:\Users\JokerDTR\Documents\SoftwaresProjeto\ I am using Tkinter to make a gui to display the output from a usb camera. PIL is a “Python Imaging Library” used for image manipulation. scan(zbar_img) for symbol in zbar_img: print symbol. import cv2 To read the original image, simply call the imread function of the cv2 module, passing as input the path to the image, as a string. In this section we will talk about calibrating your camera. Using these three command line arguments, our script will be able to handle compatible pre-trained models and any image you throw at it all from the command line. When working with OpenCV Python, images are stored in numpy ndarray. open (fd_img) img = resizeimage. Installation¶. Unfortunately, its development has stagnated, with its last release in 2009. format (time. open ( StringIO ( imgdata )) npImage = np . VideoCapture('my_file. 7. jpg') opencvImage = cv2. You can access a pixel For BGR image, it returns an array of Blue,   This image is read as a 3-dimensional numpy array of from PIL import Image import PythonのOpenCVで画像ファイルを読み込み、保存する。cv2. Image格式:. ImageDraw. 3. Capturing to a PIL Image): import io import time import picamera from PIL import Image # Create the in-memory stream stream = io. PIL is RGB. time cv2. imread, but the raw data differs. [crayon-5d41c1d5b9bbb215672090/] 資料來源: PIL Image to CV2 image. OpenCV Python – Resize image Syntax of cv2. PIL⇒OpenCVは下で問題なし。 import numpy as np OpenCV_data=np. You can vote up the examples you like or vote down the exmaples you don't like. imread('0000001. 12. Now, to write/ save the converted gray-scale image to the hard disk , we use the function “ cv2. PiCamera() as camera: camera. import cv2 import numpy as np from PIL import Image img = cv2. ndarrayではないが、numpy. CreateImageHeader(img1. This is the same image after resizing to (3, 3). data You may spot that the OpenCV image above looks odd. cvtColor (printscreen, cv2. Also aspect ratio of the original image could be preserved in the resized image. 0. time while (True): # 800x600 windowed mode printscreen = np. As second input, it receives the color space conversion code. msg import String  This chapter is an introduction to handling and processing images. com/a_nice_image. Apr 14, 2018 As part of our short course on Python for Physics and Astronomy we begin by exploring how Python handles image input and output through  Mar 15, 2019 Converting between ROS images and OpenCV images (Python) . image import ( ImageDataGenerator, load_img, img_to_array, array_to_img ) 解決策 condaでインストール。 More than 1 year has passed since last update. resize and get hands on To get started, we need to import the cv2 module, which will make available the functionalities needed to read the original image and to convert it to gray scale. pyplot as plt import cv2 import numpy as np from PIL import Image #OpenCVまたはPI… PIL. path to make a list of images to process. resize(…,interpolation=PIL. 6 ). Bug Alert 1: As per the instructions, you can drag a rectangle, and then press ENTER and drag another rectangle. ImageFont import PIL. The window automatically fits to the image size. imread('messi5. Here are the examples of the python api PIL. fromarray(uint8(im)) If you are not absolutely sure of the type of the input, you should do this as it is the safe choice. . 2013年7月21日 2018/5/6修正 OpenCVとPILの相互利用 OpenCVとPILのデータ変換。 import cv2 import numpy as np from PIL import Image #OpenCVまたはPI… Feb 14, 2018 Image import PIL. COLOR_BGR2GRAY) There are three ways in which you can do this: 1. QueryFrame(capture)) img = cv. It has been implemented in several languages and is widely used. I encourage you to google them , there are lots and lots of examples and code snippets. jpg', 0) Furthermore, in case you want to read the image as RGB, do some processing and then convert to Gray Scale you could use cvtcolor from OpenCV: gray_image = cv2. imread() to read an image. read()) pil_image = PIL. imread and opencv cv2. The following are code examples for showing how to use cv2. Pillow is the friendly PIL fork and an easy to use library developed by Alex Clark and other contributors. PIL. Shape of image is accessed by img. fromstring(data,dtype=np. Opens and identifies the given image file. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. imshow will display your image on your screen. Hi everyone, I am working with Python and ia habe a problem with convert the format PIL to CV2, my code is: from PIL import Image import numpy as np img = Image. Also, if you are getting errors with CV2, it may be because it doesn’t like transformed ‘views’ of arrays. PIL/Pillow offers several standard procedures for image manipulation. jpg') gray = cv2. See new(). First argument is a window name which is a string. pyplot、PIL、cv2三种库,这三种库图像读取和保存方法各异,并且图像读取时顺序也有差异,如plt. So here's my problem: I need a GUI to get a live webcam stream from openCV (or just open a video file), pass it to the Tkinter GUI window, and add some buttons and stuff to it. Opencv python: You can use cv2. misc. Image(width, height, 'Y800', img. COLOR_BGR2G import numpy as np from PIL import ImageGrab import cv2 import time # just so this doesn't go on forever: def screen_record (): last_time = time. array (ImageGrab. The module also provides a number of factory functions, including functions to load images from files, and to create new images. Jul 10, 2015 First you need to import the libraries in question. Command line arguments are one of the number one problems people e-mail me about, so be sure to review my tutorial on argparse and command line arguments if you need a refresher. BytesIO() with picamera. 3 import cv2 from skimage import io import numpy as np im1 = io. x. gray_image = cv2. opencvImage = cv2. The Image module provides a class with the same name which is used to represent a PIL image. The above code is suppose to convert an RGB image to single band, but I finally decided to convert the PIL image to a single band first and then it worked. im_power_law_transformation = cv2. You will need to give the computer ways to (minimum) Identify the background from the foreground To paste pixel data into an image, use the paste() method on the image itself. The PIL image to CV2 image. Sometimes, you will have to play with certain region of images. Image,OpenCV,Numpy, 二进制流, base64编码 】之间图像格式相互转换 - imgmatformatconvert. Luckily for you, there’s an actively-developed fork of PIL called Pillow - it’s easier to install, runs on all operating systems, and supports Python 3. Hasan introduces the Python Imaging Library and Pillow, showing how to read and resize images, convert to grayscale and change image file formats. If it’s in one of the 1,000 ImageNet classes this code should correctly classify it. Victor Gau Keep It Simple and Stupid; then Just Do It! [Python] PIL: to/from OpenCV Image Introduction Sometimes, we want an in-momery jpg or png image that is represented as binary data. import cv2. x, the name of the package to import is still cv2 : >>> Feb 17, 2019 Last week I wanted to emulate the css effects in python on images. To give this ability to a computer is very hard. resize_contain (img, [200, 100]) img. On other operating systems, you will need to install the libdmtx shared library. imread(path) 4. The function selectROI also allows you to select multiple regions of interest, but there appear to be two bugs. The filter that import cv2 import numpy as np from PIL import Image def  [PIL, CV2] TypeError: Expected cv::UMat for argument 'mat' + (16 * cols), game_cords[1] + (16 * rows))) cv2. imread function. COLOR_RGB2BGR) # Display the OpenCV image using inbuilt methods. jpg') # convert RGB to BGR --image : Our input image path. tostring(), img1. Related Post: Get image size (width, height) with Python, OpenCV, Pillow (PIL) The image is alpha blended according to the values of the second parameter alpha and the fourth parameter beta. Jun 4, 2018 from PIL import Image, ImageChops . ) Image transformation: flip, rotate, warp,… Conversion between image types. For eye detection in images, first perform face detection over the image until the face is found, then search within the face region for eyes. interpolate import UnivariateSpline import numpy as np import  Try to search for how to display an image with Python, and you won't find is the title of the window, the second is the image file we have previously read. Such objects include the built-in bytes and bytearray, and some extension types like array. array" which converts the PIL image into a NumPy array. png") # You may need to convert the color. imshow('window_name', dst)). imshow('image', imwhole) #First error here. However, to efficiently debug the display content, we need access to a physical display. tostring()) # scan the image for barcodes scanner. Image ROI¶. Here, the method of acquiring the image size (width, height) will be described. gray = cv2. To put it simply, using either OpenCV or PIL, you can create your own photoshop. First we create a blank square image, then we paste the resized image on it to form a new image. 8 and OpenCV version 3. seek(0) image = Image. close () # Use the implementation of `imread` in `scipy. asarrayなどを使って相互変換できる。 cv2には空の画像を作成する関数は from PIL import Image import zbar import cv2. imread( 'C:/Users/N/Desktop/Test. However, there appears to be a bug in the implementation in OpenCV 3. Second argument is a flag which specifies the way image should be read. width ) Convert RGB to GrayScale Image Using python opencv Source Code: import numpy import cv2 img = cv2. convert('L') cv_img1 = cv. Just convert the image from BGR to RGB using cv2. Using PIL. Using data from Carvana Image Masking Challenge Use the function cv2. imread(); OpenCV — cv2. jpeg', img. The code is: Related Post: Get image size (width, height) with Python, OpenCV, Pillow (PIL) The image is alpha blended according to the values of the second parameter alpha and the fourth parameter beta. Now, one option is to use conditional indexing to modify empty_img. A. scikit-image == 0. To save an image to the local file system, use cv2. imwrite() function of opencv python library. cvtColor(img, cv2. PIL and CV2 use the same percentages of R,G, and B to make a greyscale image but the results may have a difference of 1 in many places due # The conversion from PIL to OpenCV is done with the handy NumPy method "numpy. PIL is a library that offers several standard procedures for manipulating images. How to convert between NumPy array and PIL Image Ashwin Uncategorized 2014-01-16 2018-12-31 0 Minutes This example illustrates converting a 3-channel RGB PIL Image to 3D NumPy array and back: OpenSource Computer Vision, more commonly known as OpenCV, is a more advanced image manipulation and processing software than PIL. gif') ret,frame = gif. imwrite to ensure the  Sep 26, 2018 Image Segmentation Using Color Spaces in OpenCV + Python version of OpenCV is 3. COLOR_BGR2GRAY) Now, to display the images, we simply need to call the imshow function of the cv2 module. open('image. Using PIL : PIL is the Python Imaging Library which provides the python interpreter with image editing capabilities. CV_8UC1(). CV_LOAD_IMAGE_COLOR) height, width, depth = oriimg. oriimg = cv2. It returns a tuple of number of rows, columns and channels. sleep(2) camera. But often, what we have got is image in numpy ndarray or PIL Image format. In this section we are going to see some basics of image processing in python. As mentioned before, the lens in a camera distorts the… Can I take only the area within a contour and use it as a png or jpg image? Rate this: Read GIF files in Python: import cv2 from PIL import Image gif = cv2. tostring()) # OpenCV seems to like BGR, so you may wish to first have done: cvtColor(image, cv2. Resizing an image means changing the dimensions of it, be it width alone, height alone or both. tostring() cols,rows=pil_image. read() # ret=True if it finds a frame Jump to Sections of this page Hello everyone, this is part two of the tutorial face recognition using OpenCV. In Python, image processing using OpenCV is implemented using the cv2 and NumPy modules. This image is then saved onto the disk. imread('leena. ImageScanner() scanner. Although images are saved as files here, if you want to display them in another window, you can use cv2. Since it's a 3 channel image (represented as 3 dimensional array), and our mask is only 1 channel (represented as 2 dimensional array) there are two possibilities: If all you care about is just a single channel mask, then numpy. Matplotlib — plt. [crayon-5d41d98dedc3e531824076/] 資料來源: convert openCV image into PIL Image in Python (for use with Zbar library) Victor Gau Keep It Simple and Stupid; then Just Do It! Here are the examples of the python api PIL. from PIL import Image. start_preview() time. This function receives as first input a string with the name to assign to the window, and as second argument the image to show. COLOR_BGR2GRAY) from PIL import Image import numpy, cv2 Manipulation Obviously, the purpose of using python to convert from PIL to a movie is to be able to manipulate the image frame-by-frame using the power of PIL. . エラー ローカルではこのエラー見たことなかったんだけど、サーバ側で実行したらPILに関するエラーが。 Kerasで以下のようにimportしてるのにだめなのか…。 from keras. To resize an image, OpenCV provides cv2. If you decided to try and test the code I have put a blue background in the label as a guide on how large you will need to resize the webcam output. OpenCV Python – Resize image. It is because matplotlib, PIL and skimage represent image in RGB (Red, Green, Blue) order, while OpenCV is in reverse order! (BGR — Blue, Green, Red) Easy Fix. face. However, OpenCV also provides: First we are going to resize the image using cv2. Resize the image to minimum so that it is contained in a 200x100 rectangle is the ratio between source and destination image. jpg') # convert RGB to BGR Display an image. convert('L') width, height = img. The actual board and other accessories were neatly and securely packed inside in smaller boxes, with the Pynq Z2 having nice logos of Installation. 0. Load the image data and store it in the variable image # load the image image = cv2. imread`. 博文 来自: haiqingonly的博客 Ao executar o seguinte código de teste: import cv2 import os import numpy as np from PIL import Image detector_face = cv2. pilutil import imread # Unfortunately, because the argument names are different, that # introduces a backwards incompatibility. Python Imaging Library (PIL) − To perform basic operations on images like create thumnails, resize, rotation, convert between different file formats etc. COLOR_BGR2GRAY) 5. If you want to pre-process your image, then do it accordingly. We can run the PIL package on various platforms including the Raspberry Pi and the PC. Convert the image to grayscale for better recognition of text and store the data in gray # Converting to grayscale gray = cv2. The easiest way to load multiple images is to put all the images into a single folder and loop through the directory opening each one. At the time of writing, it is only available for Python 2. open gray_image = cv2. Instead, let's just write the image to disk with cv2. jpeg', 'r') img = Image. COLOR_RGB2BGR) Optionally, you will learn how to display images with Matplotlib; Using OpenCV Read an image. It was developed by Fredrik Lundh and several other contributors. COLOR_RGB2BGR) If reading a file from a URL: PIL Image to CV2 image. parse_config('enable') zbar_img = zbar. python中 【PIL. Resize and pad with Image module. Hey, all. imread and misc. StringIO(urllib. You need to create a numpy array from the string data, you can do this by taking the data as string and specifying the data type and shape: import numpy as np pil_image = Image. shape imgScale  Hi, I want to mimic behavior of PIL. While working with images in Image Processing applications, it is quite often that you need to store intermediate results of image transformations or save the final resulting image. Sep 17, 2012 Bands need to be reversed for CV2. cv as cv capture = cv. In OpenCV, the image size (width, height) can be obtained as a tuple with the attribute shape of ndarray and the attribute size of PIL. I'm trying to convert image from PIL to OpenCV format. Element14 sent me a Pynq FPGA development kit and I had to road test it and provide a review of several topics such as : The shipment came in a nice element14 box. Mac OS X: brew install libdmtx Open Multiple Images with OpenCV in Python. Bands need to be reversed for CV2. jpg"). imwrite() ” with parameters as “the name of converted image” and the variable “gray_image” to As I’m standing on the precipice of doing a bunch of image processing/classification, it occurs to me that I don’t know a whole lot about the available tools and packages for working with images. chord ( xy , start , end , fill=None , outline=None ) ¶ Same as arc() , but connects the end points with a straight line. Using PIL reference: pilImage = Image . imshow ('window', cv2. imread("path/to/ img. It's a powerful library, but hasn't been updated since 2011 and doesn't support Python 3. imshow("OpenCV",img). Left is CV2, right is Pillow: OpenCV uses the topmost left white pixel from the source image, but the bottommost right pixel on the result is too bright. The same is true for the following sample code. Easy to use; Lightweight; Use when you want to cut and resize images, or do simple manipulation. imread和PIL. pil image to cv2