Jupyter笔记本:让用户输入图形

时间:2019-04-08 14:25:57

标签: python jupyter-notebook user-input

一个简单的问题,但是我找不到东西...

是否有一个简单且用户友好的工具,可以在jupyter-notebook中使用该工具,以使用户在运行单元格后在空白处(以大小(x,y)像素表示)以黑色绘制一些东西?

必须将图形作为数组/图像返回(或什至临时保存),然后可以由numpy使用。

1 个答案:

答案 0 :(得分:3)

您可以使用PILtkinter库来做到这一点,例如:

from PIL import ImageTk, Image, ImageDraw
import PIL
from tkinter import *

width = 200  # canvas width
height = 200 # canvas height
center = height//2
white = (255, 255, 255) # canvas back

def save():
    # save image to hard drive
    filename = "user_input.jpg"
    output_image.save(filename)

def paint(event):
    x1, y1 = (event.x - 1), (event.y - 1)
    x2, y2 = (event.x + 1), (event.y + 1)
    canvas.create_oval(x1, y1, x2, y2, fill="black",width=5)
    draw.line([x1, y1, x2, y2],fill="black",width=5)

master = Tk()

# create a tkinter canvas to draw on
canvas = Canvas(master, width=width, height=height, bg='white')
canvas.pack()

# create an empty PIL image and draw object to draw on
output_image = PIL.Image.new("RGB", (width, height), white)
draw = ImageDraw.Draw(output_image)
canvas.pack(expand=YES, fill=BOTH)
canvas.bind("<B1-Motion>", paint)

# add a button to save the image
button=Button(text="save",command=save)
button.pack()

master.mainloop()

您可以修改save函数以使用PILnumpy读取图像以将其作为numpy数组。 希望这会有所帮助!