使用ImageTk PhotoImage .paste（）方法產生AttributeError

Question

我正在研究一個使用tkinter的應用程序，它將允許用戶從圖像中收集數據。現在，我試圖讓用戶在整個圖像上劃一條線來指定數據的收集位置。似乎有很多方法可以用這種方式繪製線條，但我試圖使用PhotoImage對象的.paste()方法。

這裏是代碼的有關章節：

import openpyxl, PIL.Image, sys, openpyxl, glob, numpy 
from tkinter import * 
from PIL import Image, ImageTk 

class App(object): 

    instructions = ['Draw line within ventral patch', 'Draw line within eye ring', 
        'Draw line from eye ring to face', 
        'Draw proximal line from dorsal patch to ventral patch', 
        'Draw medial line from dorsal patch to ventral patch', 
        'Draw distal line from dorsal patch to ventral patch' 
        ] 

    NUMSTEPS = len(instructions) 

    def __init__(self, root): 

     self.root = root 
     w, h = root.winfo_screenwidth() * .9, root.winfo_screenheight() * .9 
     root.geometry("%dx%d+0+0" % (w, h)) 

     root.title('Squirrel Project') 
     root.wm_iconbitmap('Squirrel.ico') 

     instruction = Label(root, text = self.instructions[self.getStep()]) 
     instruction.pack(side = TOP) 

     im = self.getImage() 
     imageViewer = Label(root) 
     imageViewer.pack(fill = BOTH, expand = True) 
     root.update() 
     imageViewerSize = [imageViewer.winfo_height(), imageViewer.winfo_width()] 
     im = self.imageResize(im, imageViewerSize) 

     self.im = ImageTk.PhotoImage(im) 
     im = self.im 

     imageViewer = Label(root, image = im, cursor = 'cross') 
     root.update() 
     imageViewer.image = im 

     imageViewer.bind('<B1-Motion>', self.drawTempLine) 

     imageViewer.pack() 


     buttonFrame = Frame(root, width = w, height = 25, padx = 15, pady = 15, relief = 'raised') 
     buttonFrame.pack(side = BOTTOM) 

     saveButton = Button(buttonFrame, text = 'Confirm', command = self.save, padx = 30) 
     saveButton.pack(side = LEFT, padx = 60) 

     undoButton = Button(buttonFrame, text = 'Undo', command = self.undo, padx = 30) 
     undoButton.pack(side = RIGHT, padx = 60) 

     colorArray = numpy.array(([0], [0], [255]), dtype = int) 
     pixIm = Image.fromarray(colorArray) 
     self.pixIm = ImageTk.PhotoImage(pixIm) 

    def getImage(self): 
     files = [file for file in glob.glob('C://Users/Alec/Desktop/Squirrels/Smithsonian/lateral/*.jpg')] 

     counter = 0 
     seen = [] 
     for x in range(1, self.sheet.max_row): 
      Id = self.sheet.cell(row = x, colun = 1).value 
      seen.append(Id)  

     for file in files: 
      counter += 1 
      if file not in seen: 
       break 

     im = file 
     im = Image.open(im) 

     return im 

    def imageResize(self, image, constraint): 
     actualSize = [image.height, image.width] 

     if actualSize[0] > actualSize[1]: 
      factor = constraint[0]/actualSize[0] 
     else: 
      factor = constraint[1]/actualSize[1] 

     newSize = [value * factor for value in actualSize] 
     image.thumbnail(tuple(newSize)) 
     return image 

    def getStep(self): 
     return 0 

    def drawTempLine(self, event): 
     self.im.paste(self.pixIm, (event.x - 1, event.y - 1, event.x + 1, event.y + 1)) 


app = Tk() 
App(app) 

app.mainloop() 

這導致以下錯誤：

Exception in Tkinter callback 
Traceback (most recent call last): 
    File "C:\Users\Alec\Anaconda3\lib\tkinter\__init__.py", line 1699, in __call__ 
    return self.func(*args) 
    File "C:/Users/Alec/Contrast App.py", line 146, in drawTempLine 
    self.im.paste(self.pixIm, (event.x - 1, event.y - 1, event.x + 1, event.y + 1)) 
    File "C:\Users\Alec\Anaconda3\lib\site-packages\PIL\ImageTk.py", line 177, in paste 
    im.load() 
AttributeError: 'PhotoImage' object has no attribute 'load' 

這是什麼屬性錯誤的原因，以及如何能說的對嗎？

Answer 1

Image有粘貼方法，而不是PhotoImage。

您需要修改圖像，然後重新將其轉換爲PhotoImage來顯示它。

除非您展示完整的示例，否則我們無法幫助您的代碼，因爲我們可以運行該示例。