Xiao Ling yushulx

yushulx / web-server-camera-capture.js

Created July 17, 2020 03:22

	function capture() {
	var frame = wCap.read()
	if (frame.empty) {
	wCap.reset();
	frame = wCap.read();
	}

	dbr.decodeBufferAsync(frame.getData(), frame.cols, frame.rows, frame.step, barcodeTypes, function (err, msg) {
	// console.log(results)
	results = msg

yushulx / opencv-draw.js

Created July 17, 2020 03:21

	if (results != null) {
	for (index in results) {
	let result = results[index];

	let upperLeft = new cv.Point(result.x1, result.y1)
	let bottomLeft = new cv.Point(result.x2, result.y2)
	let upperRight = new cv.Point(result.x3, result.y3)
	let bottomRight = new cv.Point(result.x4, result.y4)

	img.drawLine(

yushulx / webcam-barcode.js

Created July 17, 2020 03:19

	const dbr = require('barcode4nodejs');
	const cv = require('opencv4nodejs');
	dbr.initLicense("LICENSE-KEY")
	barcodeTypes = dbr.barcodeTypes
	const vCap = new cv.VideoCapture(0);
	const drawParams = { color: new cv.Vec(0, 255, 0), thickness: 2 }
	const fontFace = cv.FONT_HERSHEY_SIMPLEX;
	const fontScale = 0.5;
	const textColor = new cv.Vec(255, 0, 0);
	const thickness = 2;

yushulx / decodebuffer.c

Created July 17, 2020 03:17

	void DecodeBufferAsync(const FunctionCallbackInfo<Value>& args) {
	if (!createDBR()) {return;}
	Isolate* isolate = Isolate::GetCurrent();
	Local<Context> context = isolate->GetCurrentContext();

	// get arguments
	unsigned char* buffer = (unsigned char*) node::Buffer::Data(args[0]); // file stream
	int width = args[1]->Int32Value(context).ToChecked(); // image width
	int height = args[2]->Int32Value(context).ToChecked(); // image height
	int stride = args[3]->Int32Value(context).ToChecked(); // stride

yushulx / webcam-server.go

Created July 10, 2020 06:39

	func handler(w http.ResponseWriter, r *http.Request) {
	if r.URL.Path == "/" {
	pageData := "<!DOCTYPE>" +
	"<html>" +
	" <head>" +
	" <title>HttpListener Example</title>" +
	" </head>" +
	" <body>" +
	"<img id=\"image\"/>" +
	" <script type=\"text/javascript\">var image = document.getElementById('image');function refresh() {image.src = \"/image?\" + new Date().getTime();image.onload= function(){setTimeout(refresh, 30);}}refresh();</script> " +

yushulx / webcam-server.py

Created July 10, 2020 06:38

	import http.server
	import socketserver

	class MyHandler(http.server.BaseHTTPRequestHandler):
	def do_GET(self):

	if self.path == '/':
	self.send_response(200)
	self.send_header("Content-type", "text/html")
	self.end_headers()

yushulx / webcam-server.cs

Created July 10, 2020 06:38

	using System;
	using System.IO;
	using System.Text;
	using System.Net;
	using System.Threading.Tasks;
	using OpenCvSharp;

	namespace Web
	{
	class Program

yushulx / webcam-server.js

Created July 10, 2020 06:37

	const http = require('http');
	var server = http.createServer(function (req, res) {
	if (req.url === '/' \|\| req.url === '/index.htm') {

	res.writeHead(200, { 'Content-Type': 'text/html' });
	res.write(html);
	res.end();

	}
	else if (req.url.startsWith("/image")) {

yushulx / webcam.htm

Created July 10, 2020 06:36

	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
	<html xmlns="http://www.w3.org/1999/xhtml">
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<title>Webcam</title>
	</head>

	<body>

	<img id="image"/>

yushulx / webcam-desktop.py

Created July 10, 2020 06:35

	import cv2

	cap = cv2.VideoCapture(0)

	while True:
	ret, frame = cap.read()
	cv2.imshow("Webcam", frame)
	if cv2.waitKey(1) & 0xFF == 27: # use ESC to quit
	break