Scott H. Hawley drscotthawley

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Solving environment /

Physics prof, musician, code tinkerer. Specialty: ML + Musical Audio

261 followers · 35 following

Belmont University, Physics
Nashville, TN
http://hedges.belmont.edu/~shawley/
@drscotthawley

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drscotthawley / greenscreen.py

Last active December 10, 2021 07:21

greenscreen.py: Greenscreen effect without a physical green screen, via OpenCV and Python

	#! /usr/bin/env python
	'''
	greenscreen.py: Greenscreen effect without a physical green screen
	This performs background subtraction, and sets the background to "green" for use with "key frame" video editing software
	Author: Scott Hawley, https://github.com/drscotthawley


	Requirements:
	Python, NumPy and OpenCV
	I got these via Macports, but Homebrew, etc. work.

drscotthawley / tictactoe_policy.py

Last active August 17, 2017 14:28

My implementation of a temporal difference policy method for playing Tic Tac Toe, after seeing Shlomo Bauer speak at the Brentwood A.I. meetup.

	#! /usr/bin/env python3

	# Uses temporal difference policy method
	# See, e.g., http://www.cs.dartmouth.edu/~lorenzo/teaching/cs134/Archive/Spring2009/final/PengTao/final_report.pdf

	# In this code, X plays randomly whereas O 'learns'. (Feel free to change that)
	# Thus we expect O to outperform X eventually

	# Author: Scott Hawley http://drscotthawley.github.io
	# Unlimited License: Feel free to use any or all of this code however you like.

drscotthawley / faves2bibtex.py

Last active February 6, 2024 10:43

Generate BibTex from list of Tweets you (or another user) have favorited ('liked'), tweeted or RT'd

	#! /usr/bin/env python3
	"""
	faves2bibtex.py
	Author: Scott Hawley

	Scrapes URLs contained in tweets you (or another user) favorited ('liked') for DOI & other bibliographic info,
	and tries to generate a set of BibTex entries to stdout.
	Status messages go to stderr

	Sample usage:

drscotthawley / WebAudioFreqGain.html

Last active February 19, 2023 13:31

WebAudio OSC Output for use with Wekinator

	<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
	<html> <head>
	<title>WebAudio OSC Output Example - 2 Variables</title>
	<!-- By Scott Hawley @drscotthawley. Modified from https://github.com/automata/osc-web/blob/master/web-side/app.html
	No additional license restrictions are introduced with these modifications; the automata/osc-web site gives no license info.
	Thus as far as this author is concerned: "unlimited license": feel free to use & modify in any way you wish! -->
	</head>

	<body>
	<h2>WebAudio OSC Output Example - 2 Variables</h2>

drscotthawley / Gamepad_Eyes_OSC.pde

Last active June 26, 2024 14:37

"Gamepad" Input example for Wekinator, e.g. for Xbox 360 controller

	// Gamepad_Eyes_OSC: demo of using game controller for OSC input.
	// Uses the two thumb-sticks and either the left or right bumper buttons.
	//
	// Peter Lager maintains the Game Control Plus library (for Processing),
	// which provides control data for joysticks and other game controllers
	// ...such as my Xbox 360 controller.
	//
	// This is a quick mash-up using Lager's Gcp_gamepad animated eyes example code,
	// (which is in the GCP library: In Processing, go to File > Examples..., then Contributed Libraries > Game Control Plus)
	// and Rebecca Fiebrink's Simple_Mouse_DraggedObject_2Inputs example code for Wekinator.

drscotthawley / TestRenderMan_DexedVST.ipynb

Created April 28, 2018 02:17

Slight modification of RenderMan demo, made for Python 3 and MacOS

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drscotthawley / apply_sox_effect.py

Last active November 12, 2023 18:10

Accessing Sox Audio Effects from Python via Pysox

	import pysox
	import librosa
	import numpy as np

	def apply_sox_effect(signal, sr, fxstr):
	# This writes signal to a .wav file, processes it sox to another file, loads that and returns it.
	#
	# signal: a numpy list of numbers; the audio signal
	# sr: the sample rate in Hz, must be an integer
	# fxstr: a semicolon-separated string starting with the effect name followed by parameter values in order

drscotthawley / oscilloscope.py

Last active November 3, 2024 03:49

Realtime oscilloscope in 20 lines of Python, via soundcard & OpenCV

	import numpy as np
	import cv2
	import soundcard as sc # Get it from https://github.com/bastibe/SoundCard
	imWidth, imHeight = 1024, 512 # screen size
	def draw_wave(screen, mono_audio, xs, title="oscilloscope", gain=5):
	screen *= 0 # clear the screen
	ys = imHeight/2(1 - np.clip( gain mono_audio[0:len(xs)], -1, 1)) # the y-values of the waveform
	pts = np.array(list(zip(xs,ys))).astype(np.int) # pair up xs & ys
	cv2.polylines(screen,[pts],False,(0,255,0)) # connect points w/ lines
	cv2.imshow(title, screen) # show what we've got

drscotthawley / scope_with_trigger.py

Last active May 3, 2018 03:42

Realtime waveform display with tunable trigger level

	#! /usr/bin/env python3
	# -- coding: utf-8 --
	__author__ = 'Scott H. Hawley'
	__copyright__ = 'Scott H. Hawley'
	__license__ = "MIT Licence (do what you want, don't blame me)"

	import numpy as np
	import cv2
	import soundcard as sc # https://github.com/bastibe/SoundCard
	from scipy.ndimage.interpolation import shift

drscotthawley / text_shortener.py

Last active August 27, 2020 20:31

Shorten text by applying various shortening rules

	#!/usr/bin/env python

	# Replaces lengthy words/phrases with shorter variants

	# Author: Scott Hawley

	import pandas as pd
	import re
	import os

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