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"""
DICOM files --> vtk array --> vtk 3D visualization

1. read a series of DICOM files by vtkDICOMImageReader(which will do HU and don't resample)
2. process vtk 3D array with marching cubes algorithm
3. render vtk 3D array
"""
import vtk
from utils import CreateTissue

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Gstreamer Pipeline Samples

Table of Contents:

• Gstreamer Pipeline Samples
  • Tips for Debug
  • Video
    • display test video
    • record to file
• record and display at the same time(queue)

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• macOS, Zsh, and more
  • Zsh initializations
  • Zsh way of $PATH
  • the special macOS
  • /usr/libexec/path_helper
    • What is it?
    • What does it do?
    • What does it break?
  • Situation explained

• The .*shrc file

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FastAPI and Uvicorn Logging

When running FastAPI app, all the logs in console are from Uvicorn and they do not have timestamp and other useful information. As Uvicorn applies python logging module, we can override Uvicorn logging formatter by applying a new logging configuration.

Meanwhile, it's able to unify the your endpoints logging with the Uvicorn logging by configuring all of them in the config file log_conf.yaml.

Before overriding:

uvicorn main:app --reload

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Deep Learning Deployment

Top Deep Learning Server

| Framework | Supported Models | GPU Libraries | | TensorFlow Serving | TensorFlow | cuDNN | | OpenVINO Model Server | TensorFlow, Caffe, ONNX, MXNet | clDNN | | Trtion Inference Server | TensorFlow, TensorRT, ONNX, Caffe2, PyTorch | cuDNN |

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#!/usr/bin/python3
#-*- coding: utf-8 -*-

import logging
import timeit
import traceback
import time

import gi
gi.require_version('Gst', '1.0')

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Build OpenCV in Mac with QT, Gstreamer Support

Install dependencies

brew install cmake #
brew install qt5 #optional
brew install gstreamer gst-plugins-base gst-plugins-good gst-plugins-bad gst-plugins-ugly gst-libav #optional
pip3 install numpy

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FFmpeg Samples

FFmpeg Wiki

List private options of the codec

# Show available `presets`
ffmpeg -h encoder=h264_nvenc

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Library Diagnosis

linker - Equivalent of DYLD_PRINT_LIBRARIES on linux? - Stack Overflow

linux - How do I find out what all symbols are exported from a shared object? - Stack Overflow

Linux

# print runtime loaded and accessed libraries

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VPN Server Setting

ocserv

# 
docker run --name ocserv --privileged -p 443:443 -p 443:443/udp -d tommylau/ocserv
# set username/password
docker exec -it ocserv ocpasswd -c /etc/ocserv/ocpasswd -g "Route,All" frank
# delete user