Yunlong yun-long

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yun-long / pngtovideo.py

Last active March 29, 2021 13:25

	import cv2
	import os
	import glob
	#
	image_folder = './Saved'
	video_name = 'video.avi'
	fourcc = cv2.VideoWriter_fourcc(*'MP4V')

	images = []
	for img in sorted(glob.glob(os.path.join(image_folder, "*"))):

yun-long / Dockerfile

Created July 8, 2020 06:51

	FROM ros:melodic-ros-core-bionic

	ENV DEBIAN_FRONTEND=noninteractive

	RUN apt-get update && apt-get install -y --no-install-recommends \
	build-essential \
	python3 python3-dev python3-pip \
	cmake \
	git \
	ca-certificates \

yun-long / kalman.py

Created July 9, 2019 08:08

A simple Kalman Filter example

	"""
	Just A simple example of the Kalman Filter for State Estimation.

	Predict:

	x_i = a * x_{i-1}
	p_i = a * p_{i-1} * a

	Update:

yun-long / tf_callback.cpp

Last active June 10, 2019 11:49

tfCallback

	/*
	A call back function for retriving ROS Transformation. The code hasn't been tested yet.
	*/

	template <typename T>
	void DynamicMotionPrimitives<T>::tfCallback(const tf2_msgs::TFMessage::Ptr & msg)
	{
	//geometry_msgs::TransformStamped world_to_uav;
	bool found_transform = false;

yun-long / quadrotor_dynamics.py

Last active June 4, 2019 13:44

A simple Quadrotor simulation with a PD controller

	"""
	A simple quadrotor simulatior. The code should self-explanatory.

	Reference: Quadcopter Dynamics, Simulation, and Control. by Andrew Gibiansky.

	Download: chrome-extension://oemmndcbldboiebfnladdacbdfmadadm/http://andrew.gibiansky.com/downloads/pdf/Quadcopter%20Dynamics,%20Simulation,%20and%20Control.pdf

	"""