如何修复 PIL 和 numpy 图像的错误

Question

您必须运行将它放入包含几张图片的文件夹中，然后运行 shuffle_all_images() 它将创建新文件夹并随机生成每个像素的所有值。我认为这与不转换为 numpy 图像而不是 PIL 图像有关？，但我想不通。

import random
import os.path
import PIL
import numpy

def image_shuffle(original_image):
    for row in len(original_image):
        for col in len(original_image[1]):
            r,g,b = original_image[row][col]
            r = random.randint(1,255)
            g = random.randint(1,255)
            b = random.randint(1,255)
            original_image[row][col] = [r, g, b]

    return original_image


def get_images(directory=None):
    """ Returns PIL.Image objects for all the images in directory.

    If directory is not specified, uses current directory.
    Returns a 2-tuple containing 
    a list with a  PIL.Image object for each image file in root_directory, and
    a list with a string filename for each image file in root_directory
    """

    if directory == None:
        directory = os.getcwd() # Use working directory if unspecified

    image_list = [] # Initialize aggregaotrs
    file_list = []

    directory_list = os.listdir(directory) # Get list of files
    for entry in directory_list:
        absolute_filename = os.path.join(directory, entry)
        try:
            image = PIL.Image.open(absolute_filename)
            file_list += [entry]
            image_list += [image]
        except IOError:
            pass # do nothing with errors tying to open non-images
    return image_list, file_list

def shuffle_all_images(directory=None):
    """ Saves a modfied version of each image in directory.

    Uses current directory if no directory is specified. 
    Places images in subdirectory 'modified', creating it if it does not exist.
    New image files are of type PNG and have transparent rounded corners.
    """

    if directory == None:
        directory = os.getcwd() # Use working directory if unspecified

    # Create a new directory 'modified'
    new_directory = os.path.join(directory, 'modified')
    try:
        os.mkdir(new_directory)
    except OSError:
        pass # if the directory already exists, proceed  

    #load all the images
    image_list, file_list = get_images(directory)  

    #go through the images and save modified versions
    for n in range(len(image_list)):
        # Parse the filename
        filename, filetype = file_list[n].split('.')

        # Round the corners with radius = 30% of short side
        new_image = image_shuffle(image_list[n])
        #save the altered image, suing PNG to retain transparency
        new_image_filename = os.path.join(new_directory, filename + '.png')
        new_image.save(new_image_filename)

Answer 1

image_shuffle函数错误。应该是：

for row in range(original_image.size[0]):
    for col in range(original_image.size[1]):
        r = random.randint(0,255)
        g = random.randint(0,255)
        b = random.randint(0,255)
        original_image.putpixel((row, col), (r,g,b))

您希望颜色值从 0 开始，除非您不想获得所有可能的颜色。

如何修复 PIL 和 numpy 图像的错误

How do I fix my error with PIL and numpy images

python

numpy

image

python-imaging-library

python-3.x