add operator -> MiDaS computes relative inverse depth from a single i…

[meua]

add MiDaS models for computing relative depth from a single image. from https://pytorch.org/hub/intelisl_midas_v2/

[haixuanTao]

Can you provide a way to run this PR as well as details about the expected outputs?

[meua]

Can you provide a way to run this PR as well as details about the expected outputs?

Yes, Here are the steps to run this instance： Steps to produce the behavior:

1. Dora start daemon: dora up
2. Start a new dataflow: dora start graphs/tutorials/webcam_single_dpt_frame.yaml --attach --hot-reload --name dpt_midas

Screenshots or Video

[haixuanTao]

Depth Frame are very visual outputs. In the best of my capabilities, I can't picture float matrix in my mind as you screenshotted. Would it be possible for you to export the depth_frame into the plot operator.

I have found an example that you can reuse: https://github.com/IntelRealSense/librealsense/blob/master/wrappers/python/examples/opencv_viewer_example.py

[meua]

Depth Frame are very visual outputs. In the best of my capabilities, I can't picture float matrix in my mind as you screenshotted. Would it be possible for you to export the depth_frame into the plot operator.

I have found an example that you can reuse: https://github.com/IntelRealSense/librealsense/blob/master/wrappers/python/examples/opencv_viewer_example.py

Ok, thanks, I'll try.

[meua]

Depth Frame are very visual outputs. In the best of my capabilities, I can't picture float matrix in my mind as you screenshotted. Would it be possible for you to export the depth_frame into the plot operator.

I have found an example that you can reuse: https://github.com/IntelRealSense/librealsense/blob/master/wrappers/python/examples/opencv_viewer_example.py

[haixuanTao]

Good, can you:

• [ ] Use operator/plot.py to plot the depth frame by replacing the original image
• [ ] Add a documentation page for your midas operator
• [ ] Clean up your code, removing unused comment
• [ ] Use black for code formatting and respect pep8

[haixuanTao]

General observation:

• Can we remove single_ as we use singular and plural to differentiate between single and multiple camera?
• Can we replace dpt by midas when naming the midas operator as we might want to support other depth estimator in the future?