Python 如何在画布上的 Tkinter 中打开 PIL 图像
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How to open PIL Image in Tkinter on Canvas
提问by user164814
I can't seem to get my PIL Image to work on canvas. Code:
我似乎无法让我的 PIL 图像在画布上工作。代码：
from Tkinter import*
import Image, ImageTk
root = Tk()
root.geometry('1000x1000')
canvas = Canvas(root,width=999,height=999)
canvas.pack()
image = ImageTk.PhotoImage("ball.gif")
imagesprite = canvas.create_image(400,400,image=image)
root.mainloop()
Error:
错误：
Traceback (most recent call last):
File "C:/Users/Mark Malkin/Desktop/3d Graphics Testing/afdds.py", line 7, in <module>
image = ImageTk.PhotoImage("ball.gif")
File "C:\Python27\lib\site-packages\PIL\ImageTk.py", line 109, in __init__
mode = Image.getmodebase(mode)
File "C:\Python27\lib\site-packages\PIL\Image.py", line 245, in getmodebase
return ImageMode.getmode(mode).basemode
File "C:\Python27\lib\site-packages\PIL\ImageMode.py", line 50, in getmode
return _modes[mode]
KeyError: 'ball.gif'
I need to use PIL images not PhotoImages because I want to resize my images. Please don't suggest switching to Pygame because I want to use Tkinter.
我需要使用 PIL 图像而不是 PhotoImages，因为我想调整我的图像大小。请不要建议切换到 Pygame，因为我想使用 Tkinter。
回答by Brionius
Try creating a PIL Image first, then using that to create the PhotoImage.
首先尝试创建一个 PIL 图像，然后使用它来创建 PhotoImage。
from Tkinter import *
import Image, ImageTk
root = Tk()
root.geometry('1000x1000')
canvas = Canvas(root,width=999,height=999)
canvas.pack()
pilImage = Image.open("ball.gif")
image = ImageTk.PhotoImage(pilImage)
imagesprite = canvas.create_image(400,400,image=image)
root.mainloop()
回答by user2866860
You can import multiple image formats, and resize with this code. "basewidth" sets the width of your image.
您可以导入多种图像格式，并使用此代码调整大小。“basewidth”设置图像的宽度。
from Tkinter import *
import PIL
from PIL import ImageTk, Image
root=Tk()
image = Image.open("/path/to/your/image.jpg")
canvas=Canvas(root, height=200, width=200)
basewidth = 150
wpercent = (basewidth / float(image.size[0]))
hsize = int((float(image.size[1]) * float(wpercent)))
image = image.resize((basewidth, hsize), PIL.Image.ANTIALIAS)
photo = ImageTk.PhotoImage(image)
item4 = canvas.create_image(100, 80, image=photo)
canvas.pack(side = TOP, expand=True, fill=BOTH)
root.mainloop()
回答by One
(An old question, but the answers so far are only half-complete.)
（一个老问题，但到目前为止的答案只完成了一半。）
Read the docs:
阅读文档：
class PIL.ImageTk.PhotoImage(image=None, size=None, **kw)
image– Either a PIL image, or a mode string. [...]file– A filename to load the image from (usingImage.open(file)).
image– PIL 图像或模式字符串。[...]file– 从中加载图像的文件名（使用Image.open(file)）。
So in your example, use
所以在你的例子中，使用
image = ImageTk.PhotoImage(file="ball.gif")
or explicitly
或明确
image = ImageTk.PhotoImage(Image("ball.gif"))
(And remember – as you did correctly: Keep a reference to the image object in your Python program, otherwise it is garbage-collected before you seee it.)
（记住——正如你所做的那样：在你的 Python 程序中保留对图像对象的引用，否则它会在你看到它之前被垃圾收集。）
回答by DanCan
I was banging my head against the wall for a while on this issue until I found the following:
我在这个问题上撞墙了一段时间，直到我发现以下内容：
http://effbot.org/pyfaq/why-do-my-tkinter-images-not-appear.htm
http://effbot.org/pyfaq/why-do-my-tkinter-images-not-appear.htm
Apparently, Python's garbage collector can trash the ImageTk object. I imagine apps using alot of widgets (like mine) are more susceptible to this behavior.
显然，Python 的垃圾收集器可以清除 ImageTk 对象。我想使用大量小部件（如我的）的应用程序更容易受到这种行为的影响。
