imageFilter

Cordova plugin: image filter

This plugin provides some image filters (e.g. Anonymous face filter, Sepia tone filter).

This plugin defines a global imageFilter object, and a method applyFilter

imageFilter.applyFilter(args, successCallBack, errorCallBack);

• args is an object and it contains

  • srcUrl - url of the source image
  • filter object that contains name of the filter, and optional filter options. E.g. {name:'SepiaTone', intensity: 0.7}
  • by default, the filtered image will not saved on the device. In case, the save copy is needed (e.g. for debugging), then can pass saveToDisk: true. E.g. {name:'SepiaTone', intensity: 0.7, saveToDisk: true}

• argument of successCallBack is url of the filtered image

Example - Image

HTML

<img id="heroImg">

Javascript

var heroImage = document.getElementById('heroImg');
var anonymousFaceFilter = {name:'AnonymousFaces'};
var args = {srcUrl: heroImage.src, filter: anonymousFaceFilter};
var successCallBack = function(filteredImageUrl){
  heroImage.src = filteredImageUrl;
};
var errorCallBack = function() {
  console.log("something wrong");
};

imageFilter.applyFilter(args, successCallBack, errorCallBack);

Example - Video (beta)

HTML

<video id="video" src="video/video1.mp4" controls="false" webkit-playsinline></video>
<img id="videoImage">
<!--
    To let webkit-playsinline (play canvas video inline) work on iOS,
    it is required to set allowsInlineMediaPlayback to true on the MainViewController.m

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    ((UIWebView*) self.webView).allowsInlineMediaPlayback = true;
}
-->

Javascript

var video = document.getElementById('video');
var canvas = document.createElement("canvas");
var ctx = canvas.getContext('2d');
var videoImg = document.getElementById('videoImage');
var anonymousFaceFilter = {name:'AnonymousFaces'};

var adjustCanvasDimension = function() {
    canvas.width = this.videoWidth;
    canvas.height = this.videoHeight;
};
var applyAnonymousFaceFilterOnVideoBody = function() {
    ctx.drawImage(app.video, 0, 0, canvas.width, canvas.height);
    imageFilter.applyFilter({ srcUrl: canvas.toDataURL(), filter: anonymousFacesFilter },
        applyAnonymousFaceFilterOnVideoSuccessCB,
        applyAnonymousFaceFilterOnVideoFailCB);
};
var applyAnonymousFaceFilterOnVideoSuccessCB = function(filteredImg) {
    videoImg.src = filteredImg;
    setTimeout(applyAnonymousFaceFilterOnVideo);
};
var applyAnonymousFaceFilterOnVideoFailCB = function() {
    video.pause();
    console.log('imageFilter.applyFilter() failed');
};
var applyAnonymousFaceFilterOnVideo = function() {
    if (!video.paused && !video.ended) {
        applyAnonymousFaceFilterOnVideoBody();
    }
};

video.addEventListener('loadedmetadata', adjustCanvasDimension, false);
video.addEventListener('loadeddata', applyAnonymousFaceFilterOnVideoBody, false);
video.addEventListener('play', applyAnonymousFaceFilterOnVideo, false);

Installation

cordova plugin add kimberley-plugin-imagefilter

Test App

A simple test app is included, please add ios platform before try

1. cordova platform add ios
2. cordova prepare ios
3. Use Xcode to try it or use cordova run ...

Test App Screen - Image

| Before the anonymous face filter | After the anonymous face filter | | --- | --- | | | |

Test App Screen - Video

| Anonymous face filter on video | Anonymous face filter on video | | --- | --- | | | |

Supporting platform

• iOS

Coming soon ...

• More filters
• Other platform like Android

Release note

0.0.4

• Option to save filtered image on device (default is not save)
• Reuse CIContext
• Test-app, apply ananoymous face filter on video (beta)
• Documentation update

0.0.3

• Documentation update

0.0.2

• Documentation update

0.0.1

• Initial