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生成文件的3d图，例子：
文字：

隐藏图：

使用建议：
１、建议不用中文，因为中文太复杂，生成立体图效果不好。
２、需要指定FONT_PATH，为一个ttf文件，linux在/usr/share/fonts目录下，windows在C:\Windows\Fonts
３、建议字体TEXT_SIZE调大，不然不好分辨
４、指定的TEXT不要太长
５、多试几次，找到合适的纹理

from PIL import Image, ImageDraw, ImageFont
from random import *
import numpy as np
from io import BytesIOFONT_PATH = '/usr/share/fonts/dejavu/DejaVuSans.ttf'   # 字体位置，linux在/usr/share/fonts/，windows
TEXT = 'love yannis'
TEXT_SIZE = 100 # 字体大小
WIDTH = 100 + int(len(TEXT) * TEXT_SIZE / 1.8)
HEIGHT = 256
SHIFT = 4 # 叠加位移# 生成纹理
def clamp(n, smallest, largest):return max(smallest, min(n, largest))def rand_ratio(base=1, delta=1):return delta * randint(1,100)*1.0/100 + baserand_ratios = [rand_ratio(), rand_ratio(), rand_ratio()]color_starts = [randint(0,200), randint(0,200), randint(0,200)]def rand_color(i):return clamp(randint(color_starts[i],int(rand_ratios[i] * color_starts[i])), 0, 255) def rand_colors():return (rand_color(0),rand_color(1),rand_color(2))perodic_x = 40
perodic_y = 40
texture = np.zeros((perodic_x, perodic_y, 3))
same_to_last_x = [False] * perodic_x
same_to_last_y = [False] * perodic_y
for x in range(0, perodic_x):same_to_last_x[x] =  random() < 0.1
for y in range(0, perodic_y):same_to_last_y[y] =  random() < 0.3texture[0][0] = rand_colors()for x in range(0,perodic_x):if same_to_last_x[x]:texture[x][0] = texture[x-1][0]else:texture[x][0] = rand_colors()# 纹理平铺
for x in range(0, perodic_x):for y in range(0,perodic_y):if same_to_last_y[y]:texture[x][y] = texture[x][y-1]elif same_to_last_x[x]:texture[x][y] = texture[x-1][y]else:texture[x][y] = rand_colors()# 生成纹理平铺图片
img = Image.new('RGB', (WIDTH, HEIGHT), color = 'white')
img_draw = ImageDraw.Draw(img) 
for x in range(0, WIDTH):for y in range(0,HEIGHT):color = texture[x % perodic_x][y % perodic_y].astype(int).tolist()img_draw.point([x,y], fill = tuple(color))# 生成文字
text = Image.new('RGB', (WIDTH, HEIGHT), color = 'black')
text_draw = ImageDraw.Draw(text) 
font = ImageFont.truetype(FONT_PATH, size=TEXT_SIZE)
text_draw.text((50,(HEIGHT-TEXT_SIZE)/2), TEXT, font=font, fill='white')# 文字叠加
img_mat = np.asarray(img)
text_mat = np.asarray(text)for x in range(0, WIDTH - SHIFT):for y in range(0, HEIGHT):if text_mat[y][x][0] != 0:img_draw.point([x,y], fill = tuple(img_mat[y, x - SHIFT].tolist()))
text.save('../tmp2.png', 'png')
img.save('../tmp.png', 'png')