fernandoc1’s gists

fernandoc1 / db_connector.cpp

Created November 20, 2017 17:30

PostgreSQL notification with Qt5

	#include "db_connector.hpp"
	#include <QSqlDriver>

	DBConnector::DBConnector(QString ip, int port, QString databaseName, QString username, QString password)
	: db(QSqlDatabase::addDatabase("QPSQL"))
	{
	this->db.setHostName(ip);
	this->db.setPort(port);
	this->db.setDatabaseName(databaseName);
	this->db.setUserName(username);

fernandoc1 / curl_http_get.cpp

Created December 6, 2017 21:44

This code is to perform http request that requires Digest authentication.

fernandoc1 / qt_timer_within_main.cpp

Created December 20, 2017 13:25

This code is to show how to call a function in a loop, from within the main thread in Qt.

	void runCapture()
	{
	WebSocketCamera websocketCamera("ws://localhost/camera");
	websocketCamera.start();

	cv::Mat image;
	int key = -1;

	websocketCamera.getImage(image);
	cv::imshow("DISPLAY", image);

fernandoc1 / qt_timer_within_main_with_lambda.cpp

Created December 20, 2017 17:34

C++ lambda function with Qt Timer and OpenCV example.

	#include <QCoreApplication>
	#include <QTimer>
	#include <QDebug>

	#include <memory>

	#include <opencv2/highgui/highgui.hpp>

	int main(int argc, char** argv)
	{

fernandoc1 / test_obj_detection.py

Created April 18, 2018 21:36

	import numpy as np
	import os
	import six.moves.urllib as urllib
	import sys
	import tarfile
	import tensorflow as tf
	import zipfile

	import matplotlib.pyplot
	from collections import defaultdict

fernandoc1 / Run.sh

Last active April 19, 2018 13:24

This code is used for inference in images, using the Tensorflow object detector. (https://github.com/tensorflow/models/blob/master/research/object_detection/g3doc/installation.md)

	#! /bin/bash

	#To run this script just type ./Run.sh <PATH TO IMAGE>

	LD_LIBRARY_PATH=/home/fccoelho/Applications/anaconda3/lib/python3.6/site-packages/../../ python test_obj_detection.py $1

fernandoc1 / convert_to_tiff.cpp

Created May 4, 2018 20:50

This code is to convert raw data buffer acquired from Flir camera to a TIFF image, using libtiff

fernandoc1 / linear_regression.cpp

Created June 19, 2018 19:23

Linear regression from std::vector of values to be used in OpenCV.

	std::pair<double, double> linearRegression(const std::vector<double>& x, const std::vector<double>& y)
	{
	const double n = x.size();
	const double s_x = std::accumulate(x.begin(), x.end(), 0.0);
	const double s_y = std::accumulate(y.begin(), y.end(), 0.0);
	const double s_xx = std::inner_product(x.begin(), x.end(), x.begin(), 0.0);
	const double s_xy = std::inner_product(x.begin(), x.end(), y.begin(), 0.0);
	const double numer = n * s_xy - s_x * s_y; // The same regardless of inversion (both terms here are commutative)
	const double denom = n * s_xx - s_x * s_x; // Will change if inverted; use this for now
	double a;

fernandoc1 / image_correlation.py

Created June 25, 2018 17:58

Calculate correlation between images in python

	#! /usr/bin/python

	import scipy
	import scipy.misc
	import scipy.signal
	import scipy.stats
	import sys

	im1 = scipy.misc.imread(sys.argv[1], mode='L')
	im2 = scipy.misc.imread(sys.argv[2], mode='L')

fernandoc1 / image_correlation.py

Created June 25, 2018 20:31

Find the best image from a folder, given it's thumbnail.