I installed the latest depthai core repository, and I ran the depth_align.py example. The result had a lot of noise. I want to improve the depth image quality. I have attached the current outputs with this post; I also tried using multiple filters but that reduced the depth coverage i.e. many regions became black on the depth image.
The link I followed to improve the depth was: link


Edit 1:
I was expecting an accuracy like ToF but since it is Active stereo it can't reach the accuracy level of ToF indoors. Also, after some decimation and filtering the depth became slightly better. I am not sure if it can be better than that.
Here are the improved results:

