Excel像素画

Elias 发布于 2022-04-01 32 次阅读

本文由本人在 2022-1-21 11:37 发表于吾爱破解

之前看了《82岁老人用Excel画画，获奖无数还开画展！而你只会做表格》这个故事之后。忽然想到图片由像素构成，excel的sheet由单元格构成， 
像素有颜色，单元格可以填充颜色。


也就是说：   像素<=>单元格；
那么我们就可以将图片每个像素的颜色读取出来，并根据像素坐标映射到excel对应的单元格中。
而且，python操作图片以及excel的库都比较成熟，应该很好操作
理论存在，那么就动手开干了。

先看效果：

我这里用的是花瓣大神的图，大家可以换成自己喜欢的图

 

原图
原图
转化后效果
转化后效果
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
# - * - coding:utf-8 - * -
# 作者：Elias Cheung
# 编写时间：2022/1/20 14:42
import math
from xlwt import *
import xlwings as xw
from PIL import Image
from typing import Tuple

def resize_image(original_pic_path: str, resized_pic_path: str, max_resize_width: int = 256) -&gt; Tuple[str, tuple]:
"""
:param original_pic_path: 【输入】需要转换成excel单元格填充的原始图片A
:param resized_pic_path: 【输出】经过缩放后的图片A
:param max_resize_width: 缩放后图片的最大宽度，由于xlwings限制，不可超过256
:return:
"""
img = Image.open(original_pic_path)
img_width, img_height = img.size

# 以max_resize_width为基准比例，计算图片等比缩放后的宽高
resize_width, resize_height = max_resize_width, math.ceil(img_height * max_resize_width / img_width)
# print(resize_width, resize_height)
resized_image = img.resize((resize_width, resize_height))
resized_image.save(resized_pic_path)
return resized_pic_path, (resize_width, resize_height)

def pixel_colour(image_path: str, image_size: tuple) -&gt; list:
"""
:param image_path: 经过缩放的图片的路径，可由resize_image()返回
:param image_size: 经过缩放后的图片的宽高，可由resize_image()返回
:return: 每个像素点的rgb点及对应的像素坐标
"""
img = Image.open(image_path)
img = img.convert('RGB')
colour_list = img.load()

img_width, img_height = image_size
pixel_coordinates = [(i, j) for i in range(img_width) for j in range(img_height)]

coordinates_and_colour_to_be_returned = [(colour_list[i, j], (i, j)) for i, j in pixel_coordinates]

return coordinates_and_colour_to_be_returned

def create_excel(size: tuple, cell_width: int=2) -&gt; str:
"""
:param size: excel画布的尺寸
:param cell_width: 每个单元格的宽度，不建议调整，此默认参数可将单个单元格大致调整为正方形
:return: 创建并经过单元格调整的excel路径，默认为当前路径
"""
cell_width = 256 * cell_width
_book = Workbook(encoding="utf - 8")
sheet = _book.add_sheet("picture", cell_overwrite_ok=True)
for i in range(size[0]):
first_col = sheet.col(i)
first_col.width = cell_width
book_name = "picture.xls"
_book.save(book_name)
return book_name

def draw_excel(excel: str, colour_and_cord: list):
"""
:param excel: 创建并经过单元格调整的excel路径，默认为当前路径
:param colour_and_cord: 每个单元格的rgb点及对应的像素坐标
:return:
"""
app = xw.App(visible=False, add_book=False)
wb = app.books.open(excel)
sht = wb.sheets[0]
print(sht)
for cell_info in colour_and_cord:
r, g, b = cell_info[0]
x, y = cell_info[1]
try:
sht.range((y + 1, x + 1), (y + 1, x + 1)).color = (r, g, b)
except ValueError as e:
# 在超过excel允许的最大列宽时出现此错误，一般由于resize_image()方法max_resize_width参数超过256时导致
print(f"cell index out of range: {e}")
continue
wb.save("processed.xlsx")

if __name__ in "__main__":
resized = resize_image(original_pic_path="kkk.jpeg", resized_pic_path="kkk.resize.png")
print(resized)
colours = pixel_colour(resized[0], resized[1])
book = create_excel(resized[1])
draw_excel(book, colours)

 

下载：picture2excel