python3.6 PIL + tkinter 实现带UI的字符画转换器

闲着没事就想着做点小东西调剂下，在知乎上看到了字符画像，就想着用python实现这个功能，主要思路如下：

1、需要将图片的转化为灰度图像 

2、将转化后的灰度图像映射到字符上

3、通过for来转化图像，主要考虑换行

4、将文件保存到本地文件夹

5、最后通过pyinstaller打包生成exe

效果如图：

代码如下：

from PIL import Image
import tkinter as tk
import tkinter.messagebox
from tkinter import filedialog

# Image file's path
file_path = "D:\\"

ascii_char = list("$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-_+~<>i!lI;:,\"^`'. "
                 "$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-_+~<>i!lI;:,\"^`'. "
                 "$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-_+~<>i!lI;:,\"^`'. "
                 "LCJUYXzcvunxrjft/\|()1{}[]?-_+~<>i!lI;:,\"^`'. ")
# ascii_char = list("~!@#$%^&*()(*&^%$#@!>:}{:<=-`.~!@#$%^&*()(*&>:}{:<=-`.^%$#@!>:}{:<=-`."
#                   "~!@#$%^&*()(*&^%!>:}{:<=-`.~!@#$%^&*()(*&>:}{:<$#@=-`.^%$#@!>:}{:<=-`."
#                   "~!@#$%^%^&*()(*&>:}{:<=-`.^%$#@!>:}{:<=-`.&*()(*&^%$#@!>:}{:<=-`.~!@#$"
#                   "~!@#$%^&*()(*&^%$#@!>:}{:<=-`.~!@#$%^&*(")
# convert color to gray between[0,255]
def get_char(r, g, b, alpha = 256): # black is 0 white is 255
if alpha == 0:
        return " "
# convert color to gray
gray = int(0.2126 * r + 0.7152 * g + 0.0722 * b)
    index = int((gray / (alpha + 1)) * len(ascii_char))
    # print(ascii_char[index])
return ascii_char[index]

# write char_image to disk
def write_file(out_file_name,content):
    with open(out_file_name,"w") as f:
        f.write(content)

# drawing the char image
def drawing(file_name= 'text.jpg', width = 250, height = 250,out_file_name = 'out_file'):
    img = Image.open(file_name)
    img.show()
    img = img.resize((width, height), Image.NEAREST)
    text = ""
for i in range(height):
        for j in range(width):
            text += get_char(*img.getpixel((j, i)))
        text += '\n'
print(text)
    write_file(out_file_name,text)

# select the image path
def select_image():
    global file_path
    file_path = filedialog.askopenfilename()
    # print(file_path)

# this function used for button_creat command
def button_drawing():
    out_file_path = file_path[:-3] + 'txt'
drawing(file_name=file_path, out_file_name= out_file_path)
    tkinter.messagebox.showinfo(title='successfully', message='char image has been created at: ' + out_file_path)

# creat the mainwindow
def main_window_show():
    window = tk.Tk()
    window.title("Drawing_char_picture")
    window.geometry('600x100')

    label = tk.Label(window, text='Image path:', font=('Arial', 12), width=15, height=2)
    label.place(x = 10, y = 10)

    entry_path = tk.StringVar()
    entry_path.set(file_path)
    entry = tk.Entry(window, textvariable=entry_path)
    entry.place(x = 130, y = 20)

    button_path = tk.Button(window, text='Image path', width=15, height=2, command=select_image)
    button_path.place(x = 280, y = 10)

    button_creat = tk.Button(window, text='create char image', width=15, height=2, command=button_drawing)
    button_creat.place(x=400, y=10)
    window.mainloop()


if __name__ == '__main__':
    main_window_show()

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