pdeutsch

import cv2
import numpy as np
import math
import argparse

res = np.array([0])

# the following will:
# - find a green blob
# - find a contour around it

pdeutsch

import cv2
import numpy as np

def show_frame(img, mask, cntr):
    cv2.imshow('orig', img)
    cv2.imshow('mask', mask)
    ch = cv2.waitKey(5) & 0xff
    if ch == ord('s'):
        cv2.imwrite(f"frame_{cntr:03d}.png", img)
    if ch == 27:

pdeutsch

import cv2
import numpy as np
import math


# create an array of points in the shape of a hexagon
def make_hex_shape():
    pts = []
    for ang in range(0, 355, 60):
        ang_r = math.radians(ang)

pdeutsch

import com.google.common.base.Stopwatch;

import java.io.*;
import java.text.DecimalFormat;
import java.util.concurrent.TimeUnit;

/**
 * This code attempts several different methods of creating and printing a string similar to:
 *   test1: 4379747.584; test2: 4379747.684; test3: 4379747.784
 *

pdeutsch

import java.io.File;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

class DeleteOldFiles {
    public static void main(String[] args) {
        deleteFiles();
    }
    

pdeutsch

# This application requires that you install Flask (pip install Flask)
# and OpenCV.
# It will start the OpenCV image processing in the background thread,
# and start then start the Flask app.  The OpenCV thread will read from
# the camera and populate the img variable with the latest image capture.
#
# Opening http://localhost:7070  in your browser should show the latest
# image capture.  Refreshing the page will show the newest image.

import cv2

pdeutsch

I installed pyv4l2 on the Rasperry Pi. https://pypi.org/project/pyv4l2/

It failed at first, but I did a pip3 install Cython first and then pip3 install pyv4l2 installed correctly.

There are four methods available on the Control object, as shown below. I also executed the get_controls() method and you can see that this dumps out a data structure containing all the possible settings, their names, values, default values, control ID, and other configuration parameters.

>>> from pyv4l2.control import Control

pdeutsch

Keybase proof

I hereby claim:

• I am pdeutsch on github.
• I am pete_deutsch (https://keybase.io/pete_deutsch) on keybase.
• I have a public key ASCg24tH9OKcmkzx6T0eQGxZmWoRWaMjht2-fnAXNGZvIAo

To claim this, I am signing this object:

pdeutsch

public class PPosTest {
	private static final double MIN_TURN_SPEED = 0.1;
    private static final double kP_TURN = -0.01; //todo: tune value

	public static void main(String[] args) {
		PPosTest test = new PPosTest();
		
		for (double targetVelocity = 0.15; targetVelocity < 0.31; targetVelocity += 0.1) { 
			for (int i = 0; i < 10; i++) {
				test.execute(targetVelocity, 0.0, (double)i * 3.0);

pdeutsch

import java.util.ArrayList;
import java.util.List;

public class MatrixTest {
    static class Point {
        double x, y;
        Point(double x, double y) { this.x = x; this.y = y; }
        double[] asArray() { return new double[] { x, y }; }
        public String toString() { return String.format("[%.2f, %.2f]", x, y); }
    }