mcarletti / http_server_auth.py

Created January 9, 2024 11:00

Share a folder to the local network in Python. Features: credentials, timeout.

	# With this script you can easily share a folder from your PC to the local network.
	# The script creates an HTTP server protected by credentials. Basic auth only: encryption certificate not included.
	# The server stops after a timeout is triggered (default: 1h).
	#
	# Example
	# -------
	# python http_server_auth.py --username u53r --password p4Sw0rd --directory ~/Public
	#
	# Anyone on the local network can access your Public folder in your home, typing your local address+port in a browser (eg. 157.27.93.172:8000).
	#

mcarletti / samsung_a3_camera_calib_front.yml

Created February 25, 2020 16:10

Samsung A3 front camera calibration using OpenCV (ChArUco board)

	# Samsung A3
	# Front camera: 8 MP, f/2.4, 31mm (standard), AF

	width: 4128
	height: 2322
	focal: 3.6

	rms: 1.6153361028439144

	camera_mtx:

mcarletti / build_opencv.sh

Last active February 8, 2024 15:43

Compile OpenCV from source

	#!/bin/bash

	# Tested on
	# ------------------------------
	# OS Ubuntu 18.04
	# Platform x86_64, aarch64
	# Python 3.6

	if [ $# != 1 ]; then
	echo -e "Usage:\n\t./build_opencv.sh VERSION\n\nExample:\n\t./build_opencv.sh 4.2.0"

mcarletti / bytes_to_image.py

Created January 29, 2020 10:06

	def load_nv12_as_bgr(filename, shape, dtype=np.uint8):
	with open(filename, "rb") as fp:
	data = fp.read()
	image = np.frombuffer(data, dtype=dtype).reshape(shape)
	image = cv2.cvtColor(image, cv2.COLOR_YUV2BGR_NV12)
	return image

mcarletti / valgrind.md

Created December 17, 2019 12:00

How to Valgrind

Install

sudo apt update
sudo apt install valgrind

Write code

hello_valgrind.c

mcarletti / auto_mount_instructions.md

Last active February 8, 2024 15:43

Instructions to mount at boot time an external disk on Ubuntu

Auto mount at boot time

Tested on Ubuntu 18.04.

Retrieve UUID

First of all, try with the command blkid (man: locate/print block device attributes) to show the UUID of the disk you want to mount. For example:

blkid /dev/nvme0n1

mcarletti / grep_in_files.sh

Created November 20, 2019 11:13

Search for a pattern (string) in all files

	#!/bin/bash

	EXTENSION=$1
	PATTERN=$2

	grep --include=".${EXTENSION}" -nRHI "${PATTERN}"

mcarletti / cvtRGB2YUV.m

Created November 11, 2019 14:00

RGB-YUV color conversion (Matlab code)

	function [Y,U,V] = cvtRGB2YUV(R,G,B)

	R = double(R);
	G = double(G);
	B = double(B);

	Y = 0.257 * R + 0.504 * G + 0.098 * B + 16;
	U = -0.148 * R - 0.291 * G + 0.439 * B + 128;
	V = 0.439 * R - 0.368 * G - 0.071 * B + 128;

mcarletti / cvutils.cpp

Last active February 8, 2024 15:43

Set of Qt / OpenCV snippets

	/*
	* Convert a cv::Mat frame to a QPixmap and show it in a Qt object.
	*
	* Parameters
	* ----------
	* frame : cv::Mat
	* Input image in BGR format.
	*/
	void updateImageFrameToQLabel(cv::Mat& frame)
	{

mcarletti / create_wordcloud.py

Last active March 7, 2024 11:35

Parse main CVF conference titles and abstracts (eg, CVPR, ICCV)

	import sys
	import numpy as np
	import matplotlib.pyplot as plt
	from wordcloud import WordCloud

	filename = sys.argv[1]
	print(filename)

	text = open(filename, "r").read()

Marco Carletti mcarletti

How to Valgrind

Install

Write code

Auto mount at boot time

Retrieve UUID