New opencv-contrib-python pip package has unexpected behavior than the one I had installed previously for cv2.selectROI

[monajalal]

Expected behaviour

After selecting an ROI, and pressing Enter key, I wanted to expand it full screen (same size as my namedWindow)

Actual behaviour

I needed to install cv2 super resolution and apparently I needed to uninstall and then install --upgrade the opencv-contrib-python package. After doing so, now when I select the ROI, it doesn't zoom it out to the size of namedWindow (in this case my sized window is full screen) and it just shows the exact amount that is selected.

Dimension of the second display where I am showing my image

The old version (don't know what the version was)

The new version of opencv-contrib-python, after roi select, it doesn't set the size of image to be displayed to be size of the named window (here RealSense)

Write here what went wrong. My assumption is the new version of opencv-contrib-python has caused it. Problem is, I didn't keep track of the working version.

Steps to reproduce

• example code

  
  ## super resolution for post-cropping is very slow
  # sr = cv2.dnn_superres.DnnSuperResImpl_create()
  # path = "EDSR_x4.pb"

sr.readModel(path)

sr.setModel("edsr",4)

config.enable_stream(rs.stream.color, 1920, 1080, rs.format.bgr8, 30) cv2.namedWindow("RealSense", cv2.WND_PROP_FULLSCREEN) cv2.moveWindow("RealSense", second_display_x-1, second_display_y-1) #working resized window cv2.resizeWindow("RealSense", second_display_width, second_display_height) # Resize to screen dimensions cv2.setWindowProperty("RealSense", cv2.WND_PROP_FULLSCREEN, cv2.WINDOW_FULLSCREEN)#working resized window

   new = cv2.rotate(color_img, cv2.ROTATE_90_CLOCKWISE)
   if not roi_selected:
        roi = cv2.selectROI('RealSense', new)
        roi_selected = True
        print('roi is: ', roi)
        if roi != (0, 0, 0, 0):
            x, y, w, h = roi

    # sr_roi_img = sr.upsample(roi_image) # commenting super resolution post cropping since it is very slow
    cv2.imshow('RealSense', roi_image)
    # cv2.imshow('RealSense', sr_roi_img)

- operating system
Ubuntu 22.04
- architecture (e.g. x86)
X86
- opencv-python version

$ /usr/bin/pip3 show opencv-python Name: opencv-python Version: 4.9.0.80 Summary: Wrapper package for OpenCV python bindings. Home-page: https://github.com/opencv/opencv-python Author: Author-email: License: Apache 2.0 Location: /home/mona/.local/lib/python3.10/site-packages Requires: numpy Required-by: FaceAnalyzer, MegEngine, mmcv, mmengine, nvdu, raytracing, ultralytics

$ /usr/bin/pip3 show opencv-contrib-python Name: opencv-contrib-python Version: 4.10.0.84 Summary: Wrapper package for OpenCV python bindings. Home-page: https://github.com/opencv/opencv-python Author: Author-email: License: Apache 2.0 Location: /home/mona/.local/lib/python3.10/site-packages Requires: numpy Required-by: mediapipe

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https://github.com/IntelRealSense/librealsense/issues/13278#issuecomment-2307135755

[monajalal]

I don't know what the discrepancy between the two versions was but the following resolved it for me:

        roi_image_fullscreen = cv2.resize(roi_image, (second_display_width, second_display_height))
        cv2.imshow('RealSense', roi_image_fullscreen)

I didn't have this piece of code before and it was automatically doing it for me.