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How to detect internet speed in JavaScript

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Landin answered on April 22, 2021 Popularity 1/10 Helpfulness 1/10

answer How to detect internet speed in JavaScript

related Internet Speed Checker JavaScript

related rgb to hsv matlab

How to detect internet speed in JavaScript

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var arrTimes = [];
var i = 0; // start
var timesToTest = 5;
var tThreshold = 150; //ms
var testImage = "http://www.google.com/images/phd/px.gif"; // small image in your server
var dummyImage = new Image();
var isConnectedFast = false;

testLatency(function(avg){
  isConnectedFast = (avg <= tThreshold);
  /** output */
  document.body.appendChild(
    document.createTextNode("Time: " + (avg.toFixed(2)) + "ms - isConnectedFast? " + isConnectedFast)
  );
});

/** test and average time took to download image from server, called recursively timesToTest times */
function testLatency(cb) {
  var tStart = new Date().getTime();
  if (i<timesToTest-1) {
    dummyImage.src = testImage + '?t=' + tStart;
    dummyImage.onload = function() {
      var tEnd = new Date().getTime();
      var tTimeTook = tEnd-tStart;
      arrTimes[i] = tTimeTook;
      testLatency(cb);
      i++;
    };
  } else {
    /** calculate average of array items then callback */
    var sum = arrTimes.reduce(function(a, b) { return a + b; });
    var avg = sum / arrTimes.length;
    cb(avg);
  }
}
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Popularity 1/10 Helpfulness 1/10 Language javascript

Source: stackoverflow.com

Tags: detect javascript

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Contributed on Dec 31 2024

Landin

0 Answers Avg Quality 2/10

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Internet Speed Checker JavaScript

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//JUST AN EXAMPLE, PLEASE USE YOUR OWN PICTURE!
var imageAddr = "http://www.kenrockwell.com/contax/images/g2/examples/31120037-5mb.jpg"; 
var downloadSize = 4995374; //bytes

function ShowProgressMessage(msg) {
    if (console) {
        if (typeof msg == "string") {
            console.log(msg);
        } else {
            for (var i = 0; i < msg.length; i++) {
                console.log(msg[i]);
            }
        }
    }
    
    var oProgress = document.getElementById("progress");
    if (oProgress) {
        var actualHTML = (typeof msg == "string") ? msg : msg.join("<br />");
        oProgress.innerHTML = actualHTML;
    }
}

function InitiateSpeedDetection() {
    ShowProgressMessage("Loading the image, please wait...");
    window.setTimeout(MeasureConnectionSpeed, 1);
};    

if (window.addEventListener) {
    window.addEventListener('load', InitiateSpeedDetection, false);
} else if (window.attachEvent) {
    window.attachEvent('onload', InitiateSpeedDetection);
}

function MeasureConnectionSpeed() {
    var startTime, endTime;
    var download = new Image();
    download.onload = function () {
        endTime = (new Date()).getTime();
        showResults();
    }
    
    download.onerror = function (err, msg) {
        ShowProgressMessage("Invalid image, or error downloading");
    }
    
    startTime = (new Date()).getTime();
    var cacheBuster = "?nnn=" + startTime;
    download.src = imageAddr + cacheBuster;
    
    function showResults() {
        var duration = (endTime - startTime) / 1000;
        var bitsLoaded = downloadSize * 8;
        var speedBps = (bitsLoaded / duration).toFixed(2);
        var speedKbps = (speedBps / 1024).toFixed(2);
        var speedMbps = (speedKbps / 1024).toFixed(2);
        ShowProgressMessage([
            "Your connection speed is:", 
            speedBps + " bps", 
            speedKbps + " kbps", 
            speedMbps + " Mbps"
        ]);
    }
}

Popularity 10/10 Helpfulness 5/10 Language javascript

Source: stackoverflow.com

Tags: javascript j

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Contributed on Apr 22 2021

HackNetAyush

0 Answers Avg Quality 2/10

rgb to hsv matlab

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% Membaca gambar
img = imread('test.jpg');

% Representasikan gambar RGB dalam rentang [0, 1]
I = double(img) / 255;
R = I(:,:,1);
G = I(:,:,2);
B = I(:,:,3);

% Konversi gambar ke HSV untuk mendapatkan channel Hue dan Saturation
HSV = rgb2hsv(img);  % rgb2hsv secara otomatis mengonversi gambar RGB ke HSV
H = HSV(:,:,1);  % Komponen Hue
S = HSV(:,:,2);  % Komponen Saturation
V = HSV(:,:,3);  % Komponen Value

% Membuat gambar HSV dengan channel Hue, Saturation, dan Value
HSI = zeros(size(img));
HSI(:,:,1) = H;  % Menyimpan Hue
HSI(:,:,2) = S;  % Menyimpan Saturation
HSI(:,:,3) = V;  % Menyimpan Value

% Menampilkan gambar HSV
figure;
imshow(HSV);
title('HSV Image');

Popularity 1/10 Helpfulness 1/10 Language css

Source: www.geeksforgeeks.org

Tags: css hsv matlab rgb

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Contributed on Dec 29 2024

Elated Eland

0 Answers Avg Quality 2/10

rgb to hsv matlab

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% MATLAB program for RGB to HSI image conversion.
    img = imread('test.jpg');
 
% Represent the RGB image in [0 1] range
    I = double(img) / 255;
    R = I(:,:,1);
    G = I(:,:,2);
    B =    I(:,:,3);
 
% Converting the image to HSV to 
% obtain the Hue and Saturation Channels
    HSV = rgb2hsv(img);
    H = HSV(:,:,1);
    S = HSV(:,:,2);
 
% Intensity
    I = sum(I, 3)./3;
 
% Creating the HSL Image
  HSI = zeros(size(img));
  HSI(:,:,1) = H;
  HSI(:,:,2) = S;
  HSI(:,:,3) = I;
  figure,imshow(HSI); title('HSI Image');

Popularity 1/10 Helpfulness 1/10 Language whatever

Source: www.geeksforgeeks.org

Tags: matlab rgb whatever hsv

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Contributed on Dec 29 2024

Elated Eland

0 Answers Avg Quality 2/10

How to detect internet speed in JavaScript

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