Pil image to numpy open('input_image. How do I convert a PIL Image back and forth to a NumPy array so that I can do faster pixel-wise transformations than PIL's PixelAccess allows? I can convert it to a NumPy array via: pic = Image. fromarray() function is used for this task, which takes a NumPy array as input and creates a PIL Image object. zeros((h, w, 3), dtype=np. The resulting array will have dimensions corresponding to the image's height Dec 22, 2020 · There are a few ways to convert a pillow (PIL) image to a numpy array. Python Program from PIL import Image import numpy as np # Open the image file image = Image. So, how can you effectively achieve this conversion? Method 1: Converting a PIL Image to a NumPy Array. it has 4 layers. It can be installed by using. array(img): This line converts the PIL Image object img into a NumPy array. Image. 参考：PIL Image to Numpy Array 在Python中，我们经常会使用PIL库（Python Imaging Library）来处理图像，而Numpy库则是用来进行数组操作的利器。 如何将PIL图像转换为NumPy数组：详细指南与实例 参考：convert pil image to numpy array 在图像处理和计算机视觉领域，将PIL（Python Imaging Library）图像转换为NumPy数组是一个常见且重要的操作。这种转换允许我们利用NumPy强大的数值计算能力来处理和分析图像数据。 I want to take a NumPy 2D array which represents a grayscale image, and convert it to an RGB PIL image while applying some of the matplotlib colormaps. The Python Imaging Library (PIL) is a library in Python with various image processing functions. In this Answer, we’ll learn how to convert a PIL image to a NumPy array. jpg") pix = numpy. uint8) data[0:256, 0: 这表明我们成功将PIL图像转换为了一个形状为(320, 800, 3)，数据类型为uint8的Numpy数组。在这个数组中，第一个维度代表行数，第二个维度代表列数，最后一个维度代表通道数（RGB）。. uint8(img)) uint8是专门用于存储各种图像的（包括RGB，灰度图像等），范围是从0–255，大于255的值会被截断。 Feb 7, 2017 · Assuming you have your numpy array stored in np_arr, here is how to convert it to a pillow Image: from PIL import Image import numpy as np new_im = Image. I can get a reasonable PNG output by using the Apr 1, 2025 · Once the array is converted, you can display the image or save it for later. open('your_image. asarray and just pass PIL图像转换为Numpy数组. fromarray(np. np. For that, we can Mar 27, 2024 · 将array转换为image 需要导入的头文件 from PIL import Image 函数 Image. asarray(). You could use PIL to create (and display) an image: from PIL import Image import numpy as np w, h = 512, 512 data = np. x has DNN and Caffe frameworks, and they are very helpful to solve deep learning problems. Replace 'your_image. open("foo. close() # Now you can work with the NumPy See full list on pythonpool. size[1], 3) But how do I load it back into the PIL Image after I've modified Mar 11, 2025 · Learn how to convert a PIL image to a NumPy array using two effective methods: numpy. jpg'): This line opens the specified image file using PIL's Image. You want to use numpy. open() function. This allows the array to Feb 2, 2024 · Convert a NumPy Array to PIL Image Python With the Matplotlib Colormap This tutorial explains how we can convert the NumPy array to a PIL image using the Image. 前言有时我们使用PIL库读入图像数据后需要查看图像数据的维度，比如shape，或者有时我们需要对图像数据进行numpy类型的处理，所以涉及到相互转化，这里简单记录一下。 方法当使用PIL. reshape(pic. getdata()). size[0], pic. The Image. I’ll keep this one short and sweet. array(image) It works, but the size of array appears to be (X, X, 4), i. To get started, we need to install PIL and NumPy in our system. e. fromarray() from the PIL package. Using OpenCV Library to Convert images to NumPy array. com Apr 26, 2025 · Image. If you’re working with large images or a high number of images, you really want to make sure you’re using the fastest and memory efficient conversion. jpg' with the actual path to your image. This step-by-step guide provides clear code examples and explanations, making it easy for beginners and experienced developers alike to enhance their image processing skills in Python. Install PIL and NumPy. Discover the benefits of each method and gain insights into efficient data manipulation for your Sep 30, 2022 · From the above output, we can check that the source image PIL. open()打开图片后，如果… Jul 10, 2017 · I am loading image with the following code image = PIL. Dec 5, 2024 · This post will delve into various methods for converting a PIL image to a NumPy array and vice versa, which can lead to more efficient pixel-wise operations. Convert to NumPy Array. Convert PIL image to NumPy array is a common task in image processing and computer vision applications. Using Pillow (PIL) Pillow (PIL) is a powerful image processing library that can easily convert a NumPy array into an image. open(file_path) image = np. array(pic. jpg') # Convert the image to a NumPy array image_array = np. array() and numpy. fromarray(np_arr) To show the new image, use: new_im. array(image) # Close the image image. fromarray() # 可以实现将numpy数组的图像数据转换为PIL用的数据对象 实例 pil_img = Image. OpenCV version from 3. Image and destination image types are the same. show() How to Convert PIL Image to NumPy Array: A Comprehensive Guide. This article will provide a detailed explanation of the process, along with numerous examples and code snippets to help you understand and implement this conversion effectively. pip install opencv-contrib-python The complete program to convert the given image into NumPy array using Pillow is given below. You can easily convert a PIL image into a NumPy array using the following method: In image processing tasks, we usually convert the images into NumPy arrays because this allows for faster and more efficient operations on large arrays and datasets. xblualsnpirtqamwuqrwwbrwpfghoirlsgyfturmyrfgjrlizzb