整理|夕阳
制作| CSDN(id 3360 csdnnews)
今天,Real-Time-Person-Removal(实时人物消除)项目在GitHub很生气,最近登上了GitHub Trending第一名,目前获得了1.8k star。
这个项目的魔力是,在web浏览器中使用JavaScript,可以使用200多个Ten代码,使视频屏幕上的角色对象实时消失在复杂的背景中!
现实生活中看起来不像哈利波特的梦想不可能实现,但至少可以在视频或动画中体验到看不见的快感!
首先提供GitHub地址:
这个项目能干啥?
这个项目的作者@jasonmayes(Jason mayes)是Google的高级开发人员,是机器智能研究和高级开发的倡导者,他是Ten专家,有15年以上使用新技术开发创新web解决方案的经验。
他在项目介绍中表示,该代码的目的是随着时间的推移学习视频背景的构成,使作者能够尝试从背景中删除角色,所有效果都使用Ten在浏览器中实时实现。
但同时作者表示,这只是一个实验,并不是所有情况下都是完美的。
消失的人
废话不多说,上代码!
有些人可能认为在复杂背景下实现“隐身”很复杂,但实际上只需要200多行JS代码。
1/**
2*@License
3 *版权所有2018 Google llc .保留所有权利.
4 * licensedundertheapachelicense,版本2.0(the ' license ');
5 * youmaynotusethisfileexceptincompliancewiththelicense。
6 * youmayobtainacopyofthelicenseat
7*
8*
9*
10 * unlessrequiredbyapplicablelaworagreedtoinwriting,软件
11 * distributedunderthelicenseisdistributedonan ' asis ' basis、
12 * withoutwarrantiesorconditionsofanykind、eitherexpressorimplied .
13 * seethelicenseforthespecificlanguagegoverningpermissionsand
14*limitationsundertheLicense。
15 *================================================
16*/
17
18/******************************************************************** 19 * Real-Time-Person-Removal Created by Jason Mayes 2020. 20 * 21 * Get latest code on my Github: 22 * 23 * 24 * Got questions? Reach out to me on social: 25 * Twitter: @jason_mayes 26 * LinkedIn: 27 ********************************************************************/ 28 29const video = document.getElementById('webcam'); 30const liveView = document.getElementById('liveView'); 31const demosSection = document.getElementById('demos'); 32const DEBUG = false; 33 34// An object to configure parameters to set for the bodypix model. 35// See github docs for explanations. 36const bodyPixProperties = { 37 architecture: 'MobileNetV1', 38 outputStride: 16, 39 multiplier: 0.75, 40 quantBytes: 4 41}; 42 43// An object to configure parameters for detection. I have raised 44// the segmentation threshold to 90% confidence to reduce the 45// number of false positives. 46const segmentationProperties = { 47 flipHorizontal: false, 48 internalResolution: 'high', 49 segmentationThreshold: 0.9 50}; 51 52// Must be even. The size of square we wish to search for body parts. 53// This is the smallest area that will render/not render depending on 54// if a body part is found in that square. 55const SEARCH_RADIUS = 300; 56const SEARCH_OFFSET = SEARCH_RADIUS / 2; 57 58 59// RESOLUTION_MIN should be smaller than SEARCH RADIUS. About 10x smaller seems to 60// work well. Effects overlap in search space to clean up body overspill for things 61// that were not classified as body but infact were. 62const RESOLUTION_MIN = 20; 63 64 65// Render returned segmentation data to a given canvas context. 66function processSegmentation(canvas, segmentation) { 67 var ctx = canvas.getContext('2d'); 68 69 // Get data from our overlay canvas which is attempting to estimate background. 70 var imageData = c(0, 0, canvas.width, canvas.height); 71 var data = imageDa; 72 73 // Get data from the live webcam view which has all data. 74 var liveData = videoRenderCanvasC(0, 0, canvas.width, canvas.height); 75 var dataL = liveDa; 76 77 // Now loop through and see if pixels contain human parts. If not, update 78 // backgound understanding with new data. 79 for (let x = RESOLUTION_MIN; x < canvas.width; x += RESOLUTION_MIN) { 80 for (let y = RESOLUTION_MIN; y < canvas.height; y += RESOLUTION_MIN) { 81 // Convert xy co-ords to array offset. 82 let n = y * canvas.width + x; 83 84 let foundBodyPartNearby = false; 85 86 // Let's check around a given pixel if any other pixels were body like. 87 let yMin = y - SEARCH_OFFSET; 88 yMin = yMin < 0 ? 0: yMin; 89 90 let yMax = y + SEARCH_OFFSET; 91 yMax = yMax > canvas.height ? canvas.height : yMax; 92 93 let xMin = x - SEARCH_OFFSET; 94 xMin = xMin < 0 ? 0: xMin; 95 96 let xMax = x + SEARCH_OFFSET; 97 xMax = xMax > canvas.width ? canvas.width : xMax; 98 99 for (let i = xMin; i < xMax; i++) { 100 for (let j = yMin; j < yMax; j++) { 101 102 let offset = j * canvas.width + i; 103 // If any of the pixels in the square we are analysing has a body 104 // part, mark as contaminated. 105 if [offset] !== 0) { 106 foundBodyPartNearby = true; 107 break; 108 } 109 } 110 } 111 112 // Update patch if patch was clean. 113 if (!foundBodyPartNearby) { 114 for (let i = xMin; i < xMax; i++) { 115 for (let j = yMin; j < yMax; j++) { 116 // Convert xy co-ords to array offset. 117 let offset = j * canvas.width + i; 118 119 120 data[offset * 4] = dataL[offset * 4]; 121 data[offset * 4 + 1] = dataL[offset * 4 + 1]; 122 data[offset * 4 + 2] = dataL[offset * 4 + 2]; 123 data[offset * 4 + 3] = 255; 124 } 125 } 126 } else { 127 if (DEBUG) { 128 for (let i = xMin; i < xMax; i++) { 129 for (let j = yMin; j < yMax; j++) { 130 // Convert xy co-ords to array offset. 131 let offset = j * canvas.width + i; 132 133 134 data[offset * 4] = 255; 135 data[offset * 4 + 1] = 0; 136 data[offset * 4 + 2] = 0; 137 data[offset * 4 + 3] = 255; 138 } 139 } 140 } 141 } 142 143 144 } 145 } 146 c(imageData, 0, 0); 147} 148 149// Let's load the model with our parameters defined above. 150// Before we can use bodypix class we must wait for it to finish 151// loading. Machine Learning models can be large and take a moment to 152// get everything needed to run. 153var modelHasLoaded = false; 154var model = undefined; 155 156model = bodyPix.load(bodyPixProperties).then(function (loadedModel) { 157 model = loadedModel; 158 modelHasLoaded = true; 159 // Show demo section now model is ready to use. 160 demo('invisible'); 161}); 162 163/******************************************************************** 164// Continuously grab image from webcam stream and classify it. 165********************************************************************/ 166 167var previousSegmentationComplete = true; 168 169// Check if webcam access is supported. 170function hasGetUserMedia() { 171 return !! && 172 naviga); 173} 174 175// This function will repeatidly call itself when the browser is ready to process 176// the next frame from webcam. 177function predictWebcam() { 178 if (previousSegmentationComplete) { 179 // Copy the video frame from webcam to a tempory canvas in memory only (not in the DOM). 180 videoRenderCanva(video, 0, 0); 181 previousSegmentationComplete = false; 182 // Now classify the canvas image we have available. 183 model.segmentPerson(videoRenderCanvas, segmentationProperties).then(function(segmentation) { 184 processSegmentation(webcamCanvas, segmentation); 185 previousSegmentationComplete = true; 186 }); 187 } 188 189 // Call this function again to keep predicting when the browser is ready. 190 window.requestAnimationFrame(predictWebcam); 191} 192 193// Enable the live webcam view and start classification. 194function enableCam(event) { 195 if (!modelHasLoaded) { 196 return; 197 } 198 199 // Hide the button. 200 event.('removed'); 201 202 // getUsermedia parameters. 203 const constraints = { 204 video: true 205 }; 206 207 // Activate the webcam stream. 208 naviga(constraints).then(function(stream) { 209 video.addEventListener('loadedmetadata', function() { 210 // Update widths and heights once video is successfully played otherwise 211 // it will have width and height of zero initially causing classification 212 // to fail. 213 webcamCanvas.width = video.videoWidth; 214 webcamCanvas.height = video.videoHeight; 215 videoRenderCanvas.width = video.videoWidth; 216 videoRenderCanvas.height = video.videoHeight; 217 let webcamCanvasCtx = webcamCanvas.getContext('2d'); 218 webcamCanva(video, 0, 0); 219 }); 220 221 video.srcObject = stream; 222 223 video.addEventListener('loadeddata', predictWebcam); 224 }); 225} 226 227// We will create a tempory canvas to render to store frames from 228// the web cam stream for classification. 229var videoRenderCanvas = document.createElement('canvas'); 230var videoRenderCanvasCtx = videoRenderCanvas.getContext('2d'); 231 232// Lets create a canvas to render our findings to the DOM. 233var webcamCanvas = document.createElement('canvas'); 234webcamCanvas.setAttribute('class', 'overlay'); 235liveView.appendChild(webcamCanvas); 236 237// If webcam supported, add event listener to button for when user 238// wants to activate it. 239if (hasGetUserMedia()) { 240 const enableWebcamButton = document.getElementById('webcamButton'); 241 enableWebcamBu('click', enableCam); 242} else { 243 con('getUserMedia() is not supported by your browser'); 244}CSS:
1/** 2 * @license 3 * Copyright 2018 Google LLC. All Rights Reserved. 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 * ============================================================================= 16 */ 17 18 19 20 21/****************************************************** 22 * Stylesheet by Jason Mayes 2020. 23 * 24 * Get latest code on my Github: 25 * 26 * Got questions? Reach out to me on social: 27 * Twitter: @jason_mayes 28 * LinkedIn: 29 *****************************************************/ 30 31 32 33 34body { 35 font-family: helvetica, arial, sans-serif; 36 margin: 2em; 37 color: #3D3D3D; 38} 39 40 41 42 43h1 { 44 font-style: italic; 45 color: #FF6F00; 46} 47 48 49 50 51h2 { 52 clear: both; 53} 54 55 56 57 58em { 59 font-weight: bold; 60} 61 62 63 64 65video { 66 clear: both; 67 display: block; 68} 69 70 71 72 73section { 74 opacity: 1; 75 transition: opacity 500ms ease-in-out; 76} 77 78 79 80 81header, footer { 82 clear: both; 83} 84 85 86 87 88button { 89 z-index: 1000; 90 position: relative; 91} 92 93 94 95 96.removed { 97 display: none; 98} 99 100 101 102 103.invisible { 104 opacity: 0.2; 105} 106 107 108 109 110.note { 111 font-style: italic; 112 font-size: 130%; 113} 114 115 116 117 118.webcam { 119 position: relative; 120} 121 122 123 124 125.webcam, .classifyOnClick { 126 position: relative; 127 float: left; 128 width: 48%; 129 margin: 2% 1%; 130 cursor: pointer; 131} 132 133 134 135 136.webcam p, .classifyOnClick p { 137 position: absolute; 138 padding: 5px; 139 background-color: rgba(255, 111, 0, 0.85); 140 color: #FFF; 141 border: 1px dashed rgba(255, 255, 255, 0.7); 142 z-index: 2; 143 font-size: 12px; 144} 145 146 147 148 149.highlighter { 150 background: rgba(0, 255, 0, 0.25); 151 border: 1px dashed #fff; 152 z-index: 1; 153 position: absolute; 154} 155 156 157 158 159.classifyOnClick { 160 z-index: 0; 161 position: relative; 162} 163 164 165 166 167.classifyOnClick canvas, .webcam canvas.overlay { 168 opacity: 1; 169 170 top: 0; 171 left: 0; 172 z-index: 2; 173} 174 175 176 177 178#liveView { 179 transform-origi
Html:
1<!DOCTYPE html> 2<html lang="en"> 3 <head> 4 <title>Disappearing People Project</title> 5 <meta charset="utf-8"> 6 <meta http-equiv="X-UA-Compatible" content="IE=edge"> 7 <meta name="viewport" content="width=device-width, initial-scale=1"> 8 <meta name="author" content="Jason Mayes"> 9 10 11 12 13 <!-- Import the webpage's stylesheet --> 14 <link rel="stylesheet" href=";> 15 16 17 18 19 <!-- Import Ten library --> 20 <script src="; type="text/javascript"></script> 21 </head> 22 <body> 23 <h1>Disappearing People Project</h1> 24 25 <header class="note"> 26 <h2>Removing people from complex backgrounds in real time using Ten</h2> 27 </header> 28 29 30 31 32 <h2>How to use</h2> 33 <p>Please wait for the model to load before trying the demos below at which point they will become visible when ready to use.</p> 34 <p>Here is a video of what you can expect to achieve using my custom algorithm. The top is the actual footage, the bottom video is with the real time removal of people working in JavaScript!</p> 35 <iframe width="540" height="812" src=";autoplay=1" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> 36 37 <section id="demos" class="invisible"> 38 39 40 41 42 <h2>Demo: Webcam live removal</h2> 43 <p>Try this out using your webcam. Stand a few feet away from your webcam and start walking around... Watch as you slowly disappear in the bottom preview.</p> 44 45 <div id="liveView" class="webcam"> 46 <button id="webcamButton">Enable Webcam</button> 47 <video id="webcam" autoplay></video> 48 </div> 49 </section> 50 51 52 53 54 55 <!-- Include the Glitch button to show what the webpage is about and 56 to make it easier for folks to view source and remix --> 57 <div class="glitchButton" style="position:fixed;top:20px;right:20px;"></div> 58 <script src=";></script> 59 60 <!-- Load the bodypix model to recognize body parts in images --> 61 <script src=";></script> 62 63 <!-- Import the page's JavaScript to do some stuff --> 64 <script src="; defer></script> 65 </bod 66
实时演示
你也可以在自己的Web浏览器中根据自己的喜好试着复现一下:
Code:https://code/jasonmayes/pen/GRJqgma
Gli:https://gli/~disappearing-people
等待模型加载完成,然后就可以使用了。
这是使用作者自定义算法实现的视频。上半部分是实际镜头,底部是用JavaScript实时删除人物的视频。
用你自己的网络摄像头试一下,要距离摄像头几英尺远,然后来回走动,在底部预览中你会慢慢从画面中消失。赶快试试吧,使用效果别忘了留言和大家一起分享哦!
1.《【本田ctx68多少钱】GitHub潮流排行榜登顶,明星1.8k:200行JS码,画面人物瞬间消失。》援引自互联网,旨在传递更多网络信息知识,仅代表作者本人观点,与本网站无关,侵删请联系页脚下方联系方式。
2.《【本田ctx68多少钱】GitHub潮流排行榜登顶,明星1.8k:200行JS码,画面人物瞬间消失。》仅供读者参考,本网站未对该内容进行证实,对其原创性、真实性、完整性、及时性不作任何保证。
3.文章转载时请保留本站内容来源地址,https://www.lu-xu.com/auto/2573952.html