如何使用 python 获取图像的像素坐标

Question

所以问题有点改变：

我有这段代码：

import re
from PIL import Image

def rgb_to_hex(rgb_color):
    [r, g, b] = rgb_color

    assert 0 <= r <= 255
    assert 0 <= g <= 255
    assert 0 <= b <= 255

    r = hex(r).lstrip('0x')
    g = hex(g).lstrip('0x')
    b = hex(b).lstrip('0x')

    r = (2 - len(r)) * '0' + r
    g = (2 - len(g)) * '0' + g
    b = (2 - len(b)) * '0' + b

    hex_color = '#' + r + g + b
    return hex_color


img = Image.open('img.png')
pix_val = list(img.getdata())
x, y = img.size

a = 0

for element in pix_val:
    element = list(element)
    del element[-1]
    print(rgb_to_hex(element))
    a += 1

    if a == x:
        a = 0
        print("")

这段代码的作用是打开一个图像文件并读取它的数据，然后逐列打印像素或特定行和列的十六进制代码

所以我想要的是我还想打印像素的坐标。

例如我有这个image 所以我想要我正在打印其像素值的像素的坐标。

请帮帮我

感谢您提前回答

Answer 1

你可以试试这个：

import re
from PIL import Image

def rgb_to_hex(rgb_color):
    [r, g, b] = rgb_color

    assert 0 <= r <= 255
    assert 0 <= g <= 255
    assert 0 <= b <= 255

    r = hex(r).lstrip('0x')
    g = hex(g).lstrip('0x')
    b = hex(b).lstrip('0x')

    r = (2 - len(r)) * '0' + r
    g = (2 - len(g)) * '0' + g
    b = (2 - len(b)) * '0' + b

    hex_color = '#' + r + g + b
    return hex_color


img = Image.open('img.png')
pix_val = list(img.getdata())
x, y = img.size

a = 0

for element in pix_val:
    element = list(element)
    del element[-1]
    print(rgb_to_hex(element))
    # this line of code here:
    print(f"x:{a%x} y:{int(a/x)}")
    a += 1

Answer 2

您也可以使用 python 3.6 中引入的 fstring，例如：

from PIL import Image

img = Image.open('img.png')
pixels = img.load() 
width, height = img.size

for x in range(width):
    for y in range(height):
        r, g, b = pixels[x, y]
        
        # in case your image has an alpha channel
        # r, g, b, a = pixels[x, y]

        print(x, y, f"#{r:02x}{g:02x}{b:02x}")

输出：

0 0 #4777b9
0 1 #4878ba
0 2 #4a77ba
0 3 #4a75b9
0 4 #4b73b8
0 5 #4d75ba
...

参考：

Converting a RGB color tuple to a six digit code, in Python - Stack Overflow
What’s New In Python 3.6 — Python 3.9.1 documentation
python - Getting list of pixel values from PIL - Stack Overflow

如何使用 python 获取图像的像素坐标

how to get the pixel coordinate of image using python

python

image

pixel

image-processing

python-3.x