How to displaying a numpy int16 array correctly with tkinter?
0
When loading an image into tkinter, when the image is stored as a numpy array as int16, the image displayed has pixel intensity thresholds for int8, meaning that everything looks awful (all values above 255 -which are plenty- are white). How can I set the min/max values for thresholding on tkinter?
import tkinter as tk
import numpy as np
from PIL import Image, ImageTk
root = tk.Tk()
array = np.reshape(np.array(range(0,200*200), dtype='int32'),(200,200))
img = ImageTk.PhotoImage(image=Image.fromarray(array))
canvas = tk.Canvas(root,width=300,height=300)
canvas.pack()
canvas.create_image(20,20, anchor="nw", image=img)
root.mainloop()
This is how the image looks like:
This does not seem to be a PIL problem, as the 'image' stored in image seems to keep the original values:
image=Image.fromarray(array)
image
python numpy tkinter
asked Nov 15 '18 at 0:47
hirschmehirschme
13119
|
show 9 more comments
0
When loading an image into tkinter, when the image is stored as a numpy array as int16, the image displayed has pixel intensity thresholds for int8, meaning that everything looks awful (all values above 255 -which are plenty- are white). How can I set the min/max values for thresholding on tkinter?
import tkinter as tk
import numpy as np
from PIL import Image, ImageTk
root = tk.Tk()
array = np.reshape(np.array(range(0,200*200), dtype='int32'),(200,200))
img = ImageTk.PhotoImage(image=Image.fromarray(array))
canvas = tk.Canvas(root,width=300,height=300)
canvas.pack()
canvas.create_image(20,20, anchor="nw", image=img)
root.mainloop()
This is how the image looks like:
This does not seem to be a PIL problem, as the 'image' stored in image seems to keep the original values:
image=Image.fromarray(array)
image
python numpy tkinter
asked Nov 15 '18 at 0:47
hirschmehirschme
13119
I don't think the PIL supports 16 bit integer images—at least it's not on the list shown in this documentation.
– martineau
Nov 15 '18 at 1:51
@martineau isn't that really weird? Or am I missing something? How can one display int16 images on tkinter, without depending on PIL?
– hirschme
Nov 15 '18 at 1:59
By converting them to one of the ones it does support, like 8- or 32-bit. Should be easy with numpy...although I'm no expert on using it.
– martineau
Nov 15 '18 at 2:01
int32 also displays an image with completely off threshold values. Apparently it is sticking to int8...
– hirschme
Nov 15 '18 at 2:03
Modify the code in your question so it creates annp.arrayarray with something in like your image for testing with please.
– martineau
Nov 15 '18 at 2:07
|
show 9 more comments
0
0
0
When loading an image into tkinter, when the image is stored as a numpy array as int16, the image displayed has pixel intensity thresholds for int8, meaning that everything looks awful (all values above 255 -which are plenty- are white). How can I set the min/max values for thresholding on tkinter?
import tkinter as tk
import numpy as np
from PIL import Image, ImageTk
root = tk.Tk()
array = np.reshape(np.array(range(0,200*200), dtype='int32'),(200,200))
img = ImageTk.PhotoImage(image=Image.fromarray(array))
canvas = tk.Canvas(root,width=300,height=300)
canvas.pack()
canvas.create_image(20,20, anchor="nw", image=img)
root.mainloop()
This is how the image looks like:
This does not seem to be a PIL problem, as the 'image' stored in image seems to keep the original values:
image=Image.fromarray(array)
image
python numpy tkinter
asked Nov 15 '18 at 0:47
hirschmehirschme
13119
When loading an image into tkinter, when the image is stored as a numpy array as int16, the image displayed has pixel intensity thresholds for int8, meaning that everything looks awful (all values above 255 -which are plenty- are white). How can I set the min/max values for thresholding on tkinter?
import tkinter as tk
import numpy as np
from PIL import Image, ImageTk
root = tk.Tk()
array = np.reshape(np.array(range(0,200*200), dtype='int32'),(200,200))
img = ImageTk.PhotoImage(image=Image.fromarray(array))
canvas = tk.Canvas(root,width=300,height=300)
canvas.pack()
canvas.create_image(20,20, anchor="nw", image=img)
root.mainloop()
This is how the image looks like:
This does not seem to be a PIL problem, as the 'image' stored in image seems to keep the original values:
image=Image.fromarray(array)
image
python numpy tkinter
python numpy tkinter
asked Nov 15 '18 at 0:47
hirschmehirschme
13119
asked Nov 15 '18 at 0:47
hirschmehirschme
13119
edited Nov 15 '18 at 2:12
hirschme
asked Nov 15 '18 at 0:47
hirschmehirschme
13119
asked Nov 15 '18 at 0:47
hirschmehirschme
13119
asked Nov 15 '18 at 0:47
hirschmehirschme
13119
13119
I don't think the PIL supports 16 bit integer images—at least it's not on the list shown in this documentation.
– martineau
Nov 15 '18 at 1:51
@martineau isn't that really weird? Or am I missing something? How can one display int16 images on tkinter, without depending on PIL?
– hirschme
Nov 15 '18 at 1:59
By converting them to one of the ones it does support, like 8- or 32-bit. Should be easy with numpy...although I'm no expert on using it.
– martineau
Nov 15 '18 at 2:01
int32 also displays an image with completely off threshold values. Apparently it is sticking to int8...
– hirschme
Nov 15 '18 at 2:03
Modify the code in your question so it creates annp.arrayarray with something in like your image for testing with please.
– martineau
Nov 15 '18 at 2:07
|
show 9 more comments
I don't think the PIL supports 16 bit integer images—at least it's not on the list shown in this documentation.
– martineau
Nov 15 '18 at 1:51
@martineau isn't that really weird? Or am I missing something? How can one display int16 images on tkinter, without depending on PIL?
– hirschme
Nov 15 '18 at 1:59
By converting them to one of the ones it does support, like 8- or 32-bit. Should be easy with numpy...although I'm no expert on using it.
– martineau
Nov 15 '18 at 2:01
int32 also displays an image with completely off threshold values. Apparently it is sticking to int8...
– hirschme
Nov 15 '18 at 2:03
Modify the code in your question so it creates annp.arrayarray with something in like your image for testing with please.
– martineau
Nov 15 '18 at 2:07
I don't think the PIL supports 16 bit integer images—at least it's not on the list shown in this documentation.
– martineau
Nov 15 '18 at 1:51
I don't think the PIL supports 16 bit integer images—at least it's not on the list shown in this documentation.
– martineau
Nov 15 '18 at 1:51
@martineau isn't that really weird? Or am I missing something? How can one display int16 images on tkinter, without depending on PIL?
– hirschme
Nov 15 '18 at 1:59
@martineau isn't that really weird? Or am I missing something? How can one display int16 images on tkinter, without depending on PIL?
– hirschme
Nov 15 '18 at 1:59
By converting them to one of the ones it does support, like 8- or 32-bit. Should be easy with numpy...although I'm no expert on using it.
– martineau
Nov 15 '18 at 2:01
By converting them to one of the ones it does support, like 8- or 32-bit. Should be easy with numpy...although I'm no expert on using it.
– martineau
Nov 15 '18 at 2:01
int32 also displays an image with completely off threshold values. Apparently it is sticking to int8...
– hirschme
Nov 15 '18 at 2:03
int32 also displays an image with completely off threshold values. Apparently it is sticking to int8...
– hirschme
Nov 15 '18 at 2:03
Modify the code in your question so it creates an
np.array array with something in like your image for testing with please.– martineau
Nov 15 '18 at 2:07
Modify the code in your question so it creates an
np.array array with something in like your image for testing with please.– martineau
Nov 15 '18 at 2:07
|
show 9 more comments
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I don't think the PIL supports 16 bit integer images—at least it's not on the list shown in this documentation.
– martineau
Nov 15 '18 at 1:51
@martineau isn't that really weird? Or am I missing something? How can one display int16 images on tkinter, without depending on PIL?
– hirschme
Nov 15 '18 at 1:59
By converting them to one of the ones it does support, like 8- or 32-bit. Should be easy with numpy...although I'm no expert on using it.
– martineau
Nov 15 '18 at 2:01
int32 also displays an image with completely off threshold values. Apparently it is sticking to int8...
– hirschme
Nov 15 '18 at 2:03
Modify the code in your question so it creates an
np.arrayarray with something in like your image for testing with please.– martineau
Nov 15 '18 at 2:07