Hi Tim,
Thank you.
No I'm not going to deploy it. Plus, it's not necessary to install after calling Model(mymodel) to do object detection. I checked the model info it was good.
Yes I found I can like run learn.ssd.fit() even without the Image Analyst.
Now my problem is, I can't run detect_objects(). It seems like the input raster must be a layer from online item. atcpy.Raster output is not accept. While I have no privilege to create an imagery layer to my AGOL, or share from Pro. Stuck here.