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Python - tkinter; TypeError: Expected Ptr<cv::UMat> for argument 'src'

I'm trying to build a graphical interface for image processing. I have problem uploading function.
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.
TypeError: Expected Ptr<cv::UMat> for argument 'src'
This is my code:
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!

In line no 20: you are using CvtColor to change the image to grayscale.
gray = cv2.cvtColor(file, cv2.COLOR_RGB2GRAY) you need to pass the file pointer in place of file.
That is why you are getting the error TypeError: Expected Ptr<cv::UMat> for argument 'src'
You need to :
First read the file using img=cv2.imread(file), and then use
CvtColor on the img data using gray = cv2.cvtColor(img, cv2.COLOR_RGB2GRAY).
So delete the content in line 20 and add
img=cv2.imread(file)
gray = cv2.cvtColor(img, cv2.COLOR_RGB2GRAY)
Edit:
One important thing on line 6 you are importing askopenfile which returns a binary encoded path of the image. This is wrong implementation.
Instead you should import askopenfilename; this returns the path of the image file.
I am sharing the entire updated code here :
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()
This should work let me know.
Hope this solves your purpose

You need to pass an image to cv2.cvtColor, you are currently passing a string - file.
if file:
src = cv2.imread(file)
gray = cv2.cvtColor(src, cv2.COLOR_RGB2GRAY)
gray = cv2.medianBlur(gray,5)

How to display videos on tkinter using sequence of images

I am trying to build a GUI that displays sequence of images as videos. The images are numpy arrays.
The code is working when I try to display one image at a time but it crashes when I try to run them as a sequence.
The code:
from tkinter import *
from scipy.io import loadmat
from PIL import ImageTk, Image
import time
data = loadmat('DepthFrames.mat')['DepthFrames'].squeeze(axis=0)
print(data.shape)
counter = 0
root = Tk()
image = ImageTk.PhotoImage(image = Image.fromarray(data[counter]))
root.title("WUDU VIDEOS LABEL TOOL")
myLabel = Label(root, image = image)
myLabel.grid(row = 0)
def changeImg():
global counter
counter +=1
print(counter)
image = ImageTk.PhotoImage(image = Image.fromarray(data[counter]))
myLabel.configure(image = image)
myLabel.image = image
def playVideo():
for i in range(10):
image = ImageTk.PhotoImage(image = Image.fromarray(data[i]))
myLabel.configure(image = image)
myLabel.image = image
time.sleep(0.03333)
my_Button = Button(text = "Play video",command = playVideo)
my_Button.grid(row = 1)
root.mainloop()

time.sleep blocks the main thread of tkinter. Your code will freeze the GUI until the for loop is completed and the image will be shown as the last image. For more details, see this post.
You need to use the after method. Something like this:
def playVideo(frame=0):
try:
image = ImageTk.PhotoImage(image = Image.fromarray(data[frame]))
except IndexError:
return
myLabel.configure(image = image)
myLabel.image = image
root.after(33, playVideo, frame+1)

PIL ImageTk AttributeError, can't display ImageTk on window

I've been working on a small program to convert PNG, JPG and JPEG files to .ICO files. This was relatively simple to do, but while I was trying to display the selected PNG image in Tkinter using PIL's ImageTk, I get a strange error.
from tkinter import *
from tkinter import filedialog
import re
from PIL import Image, ImageTk
root = Tk()
pathToImage = ''
selectedImage = ''
def make_square(im, min_size=256, fill_color = (0, 0, 0)): # Puts the selected image into a black square
x, y = im.size
size = max(min_size, x, y)
new_im = Image.new('RGB', (size,size), fill_color)
new_im.paste(im, (int((size - x) / 2), int((size - y) / 2)))
return new_im
def select_image(): # Function that is run when Select PNG button is clicked
global pathToImage
pathToImage = filedialog.askopenfilename(filetypes=[('PNG Files','*.png'),('JPG Files','*.jpg'),('JPEG Files','*.jpeg')]) # Gets path to PNG, JPG or JPEG image
image = Image.open(pathToImage) # Opens image in PIL
image = make_square(im=image) # Turns image into square for ICO conversion
#!!!!!!!!!!!!!!!!!!!!! ERROR Among these 3 lines
global selectedImage # Here I try to tell Python I'm referring to the global variable selectedImage
selectedImage = (ImageTk.PhotoImage(image=pathToImage)) # selectedImage is given the value of ImageTk.PhotoImage with the source image being the path of the selected image
Label(root, image=selectedImage).pack() # Throws an error for some reason
# Rest of the code works fine
image.save('output.ico')
Label(root,text='Converted file stored in the same folder as \'PNG to ICO.py\'').pack()
Button(root,text='Select PNG', command=select_image).pack()
root.mainloop()
I've tried saving the image to display to a variable, but that doesn't seem to work either. Could anyone help point out what I did wrong? I'd really appreciate it.

There are couple of issues with your code.
In your line (ImageTk.PhotoImage(image=pathToImage)) you are passing a path (str) which is not what it should take, ImageTk.PhotoImage takes instance of Image(path). So change it to the image getting returned by make_square function.
Every time when the button is clicked, it'll create a new label if that's what you want then ignore this, if not then create your labels outside of the function select_image after you create the Button and later in the function update them.
I don't really get why you are using global when you can achieve your purpose without making variables pathToImage or selectedImage unless you want to access that image later in the program.
Here is the improved version of your code.
from tkinter import *
from tkinter import filedialog
import re
from PIL import Image, ImageTk
def make_square(im, min_size=256, fill_color = (0, 0, 0)): # Puts the selected image into a black square
x, y = im.size
size = max(min_size, x, y)
new_im = Image.new('RGB', (size,size), fill_color)
new_im.paste(im, (int((size - x) / 2), int((size - y) / 2)))
return new_im
def select_image(): # Function that is run when Select PNG button is clicked
pathToImage = filedialog.askopenfilename(filetypes=[('PNG Files','*.png'),('JPG Files','*.jpg'),('JPEG Files','*.jpeg')])
image = Image.open(str(pathToImage)) # Opens image in PIL
image = make_square(im=image) # Turns image into square for ICO conversion
selectedImage = ImageTk.PhotoImage(image=image)
imglabel.img = selectedImage # create a reference of the image
imglabel['image'] = selectedImage
# selectedImage is given the value of ImageTk.PhotoImage with the source image being the path of the selected image
# Rest of the code works fine
image.save('output.ico', 'ICO')
infolabel['text'] = 'Converted file stored in the same folder as \'PNG to ICO.py\''
root = Tk()
but1 = Button(root,text='Select PNG', command=select_image)
but1.pack()
imglabel = Label(root)
imglabel.pack()
infolabel = Label(root)
infolabel.pack()
root.mainloop()

How Tkinter could load png images with transparent backgrounds?

Some weeks ago i load a png image into my Tkinter Canvas and drawed with create_image, but now i can't do this anymore, i tried convert with ImageTk but png did not display
I have the following code:
load = Image.open("mouse.png")
self.img = ImageTk.PhotoImage(load)
self.draw.create_image(100,100,image=self.img,anchor = NW)
self.draw.image = self.img
I just need to present a png image

Try this
vSmallIco = (15, 15)
self.original = Image.open('.//data//img//plus.png')
resized = self.original.resize(vSmallIco, Image.ANTIALIAS)
self.plusIco = ImageTk.PhotoImage(resized)
self.medIco = ttk.Label(self.mf, image=self.plusIco, style='Main.TLabel')
this is done with this import
from PIL import Image, ImageTk
Also, please use a *.png image if you wish to use png.

How to add all images from a folder to a button (in my frame) [closed]

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I want to store .jpg images from a folder in an array, and than use them to add it to a buttons in my frame of Python.
I am using tkinter and PIL library in Python 3.4.3 .I am using windows 8.1 os I want to load the image for a folder with few lines of code and I also element border of the grid to show them like a single image

Below is some code to get you started.
To simplify testing I wrote a small program that uses PIL to generate colored squares and saves them to a folder. I tested these programs using Python 2.6.6 on Linux. They should work on Python 3, (assuming Tkinter & PIL are installed properly on your system) but you will need to change import Tkinter as tk to
import tkinter as tk in tk_frame_grid.py.
This program generates 30 colored squares, saving them to the 'squares' folder in the current directory. You need to create 'squares' before running the program.
PIL_2colorsquares.py
#! /usr/bin/env python
''' Create squares that fade from one color to another & save
Written by PM 2Ring 2015.07.18
'''
from PIL import Image
from itertools import permutations
def color_squares(size, colorpairs, basename, ftype):
#Make the composition mask
m = 255.0 / (2 * size - 2)
r = range(size)
mask = Image.new('L', (size, size))
mask.putdata([int(m * (x + y)) for y in r for x in r])
for count, (c0, c1) in enumerate(colorpairs):
im0 = Image.new('RGB', (size, size), color=c0)
im1 = Image.new('RGB', (size, size), color=c1)
im = Image.composite(im0, im1, mask)
im.save('%s%03d%s' % (basename, count, ftype))
def main():
size = 64
colors = ('red', 'yellow', 'green', 'cyan', 'blue', 'magenta')
colorpairs = permutations(colors, 2)
basename = 'squares/sq'
ftype = '.png'
color_squares(size, colorpairs, basename, ftype)
if __name__ == '__main__':
main()
This program first fills a list with PIL images, using image files from a named directory; these images can be in any file format that PIL can read. It then creates a Tkinter window containing a Frame that holds a grid of Buttons using the images. There is no error checking, so don't put non-image files into the 'squares' folder.
You need to specify the grid dimensions. If there aren't enough images to fill the grid you will get a StopIteration error.
tk_frame_grid.py
#!/usr/bin/env python
''' Create a grid of Tkinter Buttons with PIL images in a Frame
See http://stackoverflow.com/q/31489121/4014959
Written by PM 2Ring 2015.07.18
'''
from __future__ import print_function
import os
import Tkinter as tk
from PIL import Image, ImageTk
class FrameDemo(object):
''' A Frame containing a grid of image Buttons '''
def __init__(self, rows, columns, images):
images = iter(images)
master = tk.Tk()
master.title("Image Buttons in a Frame")
frame = tk.Frame(master)
frame.pack()
for y in range(rows):
for x in range(columns):
#Get the next image from the list and
#convert it to a TK Photo object
name, img = next(images)
photo = ImageTk.PhotoImage(img)
#Create the button & put it in the Frame
b = tk.Button(frame, image=photo)
b.grid(row=y, column=x)
#Add a call-back function
func = lambda t=name: self.button_cb(t)
b.config(command=func)
#We have to save a reference to the photo or it gets
#garbage-collected, so we attach it as a button attribute
b.photo = photo
master.mainloop()
def button_cb(self, name):
print("'%s' button pressed" % name)
def main():
image_folder = 'squares'
#Load all files in image_folder as PIL images
#and put them into a list
images = [(name, Image.open(os.path.join(image_folder, name)))
for name in sorted(os.listdir(image_folder))]
gui = FrameDemo(rows=5, columns=6, images=images)
if __name__ == '__main__':
main()