[英]Python - tkinter; TypeError: Expected Ptr<cv::UMat> for argument 'src'
I'm trying to build a graphical interface for image processing.我正在尝试为图像处理构建图形界面。 I have problem uploading function.我在上传 function 时遇到问题。 When I try to check if the file / image exists and modify it, I get this error and I don't know how to fix it.当我尝试检查文件/图像是否存在并对其进行修改时,我收到此错误并且我不知道如何修复它。
TypeError: Expected Ptr<cv::UMat> for argument 'src'
This is my code:这是我的代码:
import cv2
import instructions as instructions
from PIL import Image,ImageTk
from tkinter.filedialog import askopenfile
root = tk.Tk()
logo = Image.open('logo.png')
logo = ImageTk.PhotoImage(logo)
logo_label = tk.Label(image = logo)
logo_label.image = logo
logo_label.grid(column=1,row=0)
def upload():
browse.set("loading...")
file = askopenfile(parent=root,mode="rb",title="Choose an image",filetypes =[("JPG file","*.jpg"),("PNG file","*.png"),("JPEG file","*.jpeg")])
if file:
gray = cv2.cvtColor(file, cv2.COLOR_RGB2GRAY)
gray = cv2.medianBlur(gray,5)
edges = cv2.adaptiveThreshold(gray,255,cv2.ADAPTIVE_THRESH_MEAN_C,cv2.THRESH_BINARY, 9, 9)
color = cv2.bilateralFilter(file,9,250,250)
cartoon =cv2.bitwise_and(color,color,mask=edges)
cv2.imshow("Cartoon", cartoon)
intructions = tk.Label(root,text= "Select an image",font = "Raleway")
instructions.grid(columnspan=3,column=0,row=1)
browse = tk.StringVar()
browse_button = tk.Button(root,textvariable = browse,command = lambda:upload(),font = "Raleway",bg="#20bebe",fg ="white",width=15,height =2)
browse.set("Browse")
browse_button.grid(column=1,row=2)
canvas = tk.Canvas(root,width = 600,height = 300)
canvas.grid(columnspan = 3)
root.mainloop()
Thank you!谢谢!
You need to pass an image to cv2.cvtColor
, you are currently passing a string - file
.您需要将图像传递给cv2.cvtColor
,您当前正在传递一个字符串file
。
if file:
src = cv2.imread(file)
gray = cv2.cvtColor(src, cv2.COLOR_RGB2GRAY)
gray = cv2.medianBlur(gray,5)
In line no 20: you are using CvtColor to change the image to grayscale.在第 20 行:您正在使用 CvtColor 将图像更改为灰度。
gray = cv2.cvtColor(file, cv2.COLOR_RGB2GRAY)
you need to pass the file pointer in place of file. gray = cv2.cvtColor(file, cv2.COLOR_RGB2GRAY)
您需要传递文件指针来代替文件。 That is why you are getting the error TypeError: Expected Ptr<cv::UMat> for argument 'src'
这就是为什么您收到错误TypeError: Expected Ptr<cv::UMat> for argument 'src'
You need to:你需要:
First read the file using img=cv2.imread(file)
, and then use首先使用img=cv2.imread(file)
读取文件,然后使用
CvtColor on the img data using gray = cv2.cvtColor(img, cv2.COLOR_RGB2GRAY)
.使用gray = cv2.cvtColor(img, cv2.COLOR_RGB2GRAY)
对 img 数据进行 CvtColor。
So delete the content in line 20 and add所以删除第20行的内容并添加
img=cv2.imread(file) gray = cv2.cvtColor(img, cv2.COLOR_RGB2GRAY)
Edit:编辑:
One important thing on line 6 you are importing askopenfile which returns a binary encoded path of the image.第 6 行的一件重要事情是导入 askopenfile,它返回图像的二进制编码路径。 This is wrong implementation.这是错误的实现。
Instead you should import askopenfilename;相反,您应该导入 askopenfilename; this returns the path of the image file.这将返回图像文件的路径。
I am sharing the entire updated code here:我在这里分享整个更新的代码:
import cv2 import tkinter as tk import instructions as instructions from PIL import Image,ImageTk from tkinter.filedialog import askopenfilename root = tk.Tk() logo = Image.open('logo.jpg') logo = ImageTk.PhotoImage(logo) logo_label = tk.Label(image = logo) logo_label.image = logo logo_label.grid(column=1,row=0) def upload(): browse.set("loading...") file = askopenfilename(parent=root,title="Choose an image",filetypes =[("JPG file","*.jpg"),("PNG file","*.png"),("JPEG file","*.jpeg")]) print(file) if file: img=cv2.imread(file) gray = cv2.cvtColor(img, cv2.COLOR_RGB2GRAY) gray = cv2.medianBlur(gray,5) edges = cv2.adaptiveThreshold(gray,255,cv2.ADAPTIVE_THRESH_MEAN_C,cv2.THRESH_BINARY, 9, 9) color = cv2.bilateralFilter(img,9,250,250) cartoon =cv2.bitwise_and(color,color,mask=edges) cv2.imshow("Cartoon", cartoon) intructions = tk.Label(root,text= "Select an image",font = "Raleway") instructions.grid(columnspan=3,column=0,row=1) browse = tk.StringVar() browse_button = tk.Button(root,textvariable = browse,command = lambda:upload(),font = "Raleway",bg="#20bebe",fg ="white",width=15,height =2) browse.set("Browse") browse_button.grid(column=1,row=2) canvas = tk.Canvas(root,width = 600,height = 300) canvas.grid(columnspan = 3) root.mainloop()
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