benmarwick

# in a terminal
# python -m pip install --user opencv-contrib-python numpy scipy matplotlib ipython jupyter pandas sympy nose


import cv2
import pandas as pd
import numpy as np
import imutils
from scipy.spatial import distance as dist
from imutils import perspective

gist:0e2e50e58855a352d936b2faa1d864c5

in case of inverting rotate (clockwise 180 degree),

  ⎡-1  0 1 ⎤ 
  ⎜ 0 -1 1 ⎥ 
  ⎣ 0  0 1 ⎦ 

lg

#!/bin/bash
#
# CloudyGamerLauncher by Larry Gadea
# Easily start/stop Paperspace and Parsec instances
#
# Make sure to fill out the variables below. For the machine id, use the
# 8-letter identifier for the machine on Paperspace (ex. PS8RGDUY)
#
# Note: Requires Paperspace API key (generate one in account settings)

sticilface

Guide to PROGMEM on ESP8266 and Arduino IDE

Intro

On low memory devices like the arduino and esp8266 you do not want strings to be stored in RAM. This occurs by default on these systems. Declare a string const char * xyz = "this is a string" and it will use up RAM.

The solution on these devices is to allow strings to be stored in read only memory, in Arduino this is the PROGMEM macro. Most of my experience is with the ESP8266 which is a 32bit micros controller. This device stores PROGMEM data in flash. The macro PROGMEM on ESP8266 is simply

#define PROGMEM   ICACHE_RODATA_ATTR

oandrienko

#!/usr/bin/env python

#title           :measure.py
#description     :An image processing script for measurments
#author          :Oles Andrienko, Adrian Rosebrock
#date            :20161110
#version         :0.1
#usage           :python measure.py [-l] <reference_length>
#python_version  :2.7.12
#==============================================================================

hongkongkiwi

#!/bin/sh +ux
# We set the sh +ux flags so that we error on undefined variables and error on bad commands

help() {
  echo >&2 "$0 [-f] [-p] [-q] [<priv_key_file>] [<key_type>] [<key_comment>]"
  echo >&2
  echo >&2 "-q / --quiet to silent all output (except -p if passed)"
  echo >&2 "-p / --pubkey to output public key after generation"
  echo >&2 "-f / --force to force replacing existing key"
  echo >&2

visnup

To get this working, you'll need the [live-streaming software from RICOH][1]. Install that and follow the [live video instructions][2] to connect your camera to your computer and have it show up as a video source.

If you're on a Mac, you can open up the FaceTime app and test it by picking "THETA UVC Blender" from the Video menu.

Once all of that is working, open up index.html and you should see the video rendered on the inside of a sphere that you can rotate around. Use the mouse to click and drag to move the camera around and the mouse wheel to zoom in and

suhajdab

#include "MFRC522/MFRC522.h"

/*
  Function           Core Pin      MRFC522 Pin
  Reset             D2            RST
  SPI SS            D1            SDA
  SPI MOSI          A5            MOSI
  SPI MISO          A4            MISO
  SPI SCK           A3            SCK
*/

JadenGeller

Dimensional

Matrices with friendly semantics and a familiar interface

var x: Matrix = [[1, 2, 3], [5, 6, 7]]
x.columns.append([4, 8])
let y = -x * x.transpose
assert(y.determinant == 320)

Calculua

drewbaumann

import socket
import struct
import binascii
from time import sleep
from phue import Bridge

b = Bridge('192.168.1.247') # Enter bridge IP here.
turnOn =  {'transitiontime' : 1, 'hue' : 34112, 'sat' :254, 'on' : True, 'bri' : 254}
turnOff =  {'on' : False}