如何将 png 图像转换为 RGBA 颜色列表？

Question

我寻找一种方法来读取 png 文件并制作一个二维列表矩阵来表示图像中每个像素的颜色。类似于：

import image #image library dosen't exist just for example

myimage = image.load("/document/pycharm_projects/images/pixel_avatar.png") #5x6 px image

size = myimage.size.get() #return (5, 6)
width = size[0]  # 5
height = size[1] # 6

result = []

for y in range(height):
    result.append([])
    for x in range(width):
        pixel_color = myimage.pixel((x, y)).get_rgba() # get the color of the pixel
        result[y].append(pixel_color)

获得：

[
    ["#00000000", "#000000FF", "#00000000", "#000000FF", "#00000000"],
    ["#00000000", "#000000FF", "#00000000", "#000000FF", "#00000000"],
    ["#00000000", "#000000FF", "#00000000", "#000000FF", "#00000000"],
    ["#00000000", "#00000000", "#00000000", "#00000000", "#00000000"],
    ["#000000FF", "#00000000", "#00000000", "#00000000", "#000000FF"],
    ["#00000000", "#000000FF", "#000000FF", "#000000FF", "#00000000"]
]

示例图片（放大 100 倍）：pixel_avatar.png

我该怎么做？

附加信息：
使用最新版本 python 3.7。
可以是这种表示中的颜色 (255, 255, 255, 100) 我不在乎。
结果将转换为 json 文件。

Answer 1

以下是使用 Pillow fork of the PIL（Python 成像库）的方法 - 我不相信您不熟悉的实例。

from PIL import Image
from pprint import pprint

image_filepath = 'pixel_avatar.png'

print('image file:', image_filepath)
myimage = Image.open(image_filepath)

width, height = myimage.size
print(f'size: {width} x {height}')

pixels = [['#' + bytearray(myimage.getpixel((x, y))).hex() for x in range(width)]
              for y in range(height)]
print('data:')
pprint(pixels)

打印输出：

image file: pixel_avatar.png
size: 5 x 6
data:
[['#00000000', '#000000ff', '#00000000', '#000000ff', '#00000000'],
 ['#00000000', '#000000ff', '#00000000', '#000000ff', '#00000000'],
 ['#00000000', '#000000ff', '#00000000', '#000000ff', '#00000000'],
 ['#00000000', '#00000000', '#00000000', '#00000000', '#00000000'],
 ['#000000ff', '#00000000', '#00000000', '#00000000', '#000000ff'],
 ['#00000000', '#000000ff', '#000000ff', '#000000ff', '#00000000']]

如何将 png 图像转换为 RGBA 颜色列表？

How to transform a png image into a list of list of RGBA colors?

python

image

list

pixel

python-imaging-library