Cannot open image in Ubuntu

[MendeBadra]

My os: Ubuntu 24.04

import OpenCV; const cv = OpenCV
img = cv.imread("cameraman.tif")
cv.imshow("Cameraman", img)

This code is not working, No Error but it retains the image that was previously on screen on that area. See image for reference:

[mkitti]

This code example seems to following from the OpenCV docs:
https://docs.opencv.org/4.x/d8/da4/tutorial_julia.html

To reproduce, first we need a camerman.tif. We can obtain one via TestImages.jl

using TestImages, FileIO
img = testimage("cameraman.tif")
save("cameraman.tif", img)

If I start a new temporary environment as follows, I can reproduce.

using Pkg
Pkg.activate(; temp=true)
Pkg.add(["OpenCV", "ImageView", "ImageCore"])
using OpenCV
img = OpenCV.imread("cameraman.tif")
OpenCV.imshow("Cameraman", img)

However, if I load ImageView.jl, then the issue is resolved.

using Pkg
Pkg.activate(; temp=true)
Pkg.add(["OpenCV", "ImageView", "ImageCore"])
using OpenCV, ImageView
img = OpenCV.imread("cameraman.tif")
OpenCV.imshow("Cameraman", img)

Loading ImageView.jl seems to do some initialization which then allows OpenCV.imshow to work. This is confusing though since ImageView.jl uses GTK while OpenCV.imshow appears to be QT based.

[rakeshksr]

@MendeBadra @mkitti This code works fine to me without using ImageView.jl

using OpenCV

img = OpenCV.imread("cameraman.tif")
OpenCV.imshow("Cameraman", img)
OpenCV.waitKey(0)
OpenCV.destroyAllWindows() # Close windows properly