Question

我想从网络摄像头捕获图像并保存在服务器上或通过ajax发送。从哪来两个更好的选择，为什么？欢迎提供任何可用信息。提前致谢

Answer 1

您可以通过以下步骤轻松完成此操作

第1步

从Here

下载Javascript网络摄像头项目

第2步

使用

提取解决方案并使用现有的asp.net mvc应用程序添加此完整解决方案

Add Exiting Project

第3步

从演示文件夹中打开 basic.html 替换为此

<!doctype html>

<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>WebcamJS Test Page</title>
<style type="text/css">
    body { font-family: Helvetica, sans-serif; }
    h2, h3 { margin-top:0; }
    form { margin-top: 15px; }
    form > input { margin-right: 15px; }
    #results { float:right; margin:20px; padding:20px; border:1px solid; background:#ccc; }
</style>
  </head>
<body>
<div id="results">Your captured image will appear here...</div>

<h1>WebcamJS Test Page</h1>
<h3>Demonstrates simple 320x240 capture &amp; display</h3>

<div id="my_camera"></div>

<!-- First, include the Webcam.js JavaScript Library -->
<script type="text/javascript" src="../webcam.min.js"></script>

<!-- Configure a few settings and attach camera -->
<script language="JavaScript">
    Webcam.set({
        width: 320,
        height: 240,
        image_format: 'jpeg',
        jpeg_quality: 90
    });
    Webcam.attach( '#my_camera' );
</script>

<!-- A button for taking snaps -->
<form>
    <input type=button id="takeshot" value="Take Snapshot" onClick="take_snapshot()">
</form>

<!-- Code to handle taking the snapshot and displaying it locally -->
<script language="JavaScript">

    window.onload = function () {

        setInterval(function () { take_snapshot() }, 5000);
    }
    function take_snapshot() {
        // take snapshot and get image data
        Webcam.snap( function(data_uri) {
            // display results in page
            document.getElementById('results').innerHTML = 
                '<h2>Here is your image:</h2>' + 
                '<img id="base64image" src="' + data_uri + '"/>';
        });



        var file = document.getElementById("base64image").src;

        var formdata = new FormData();
        formdata.append("base64image", file);

        $.ajax({
            url: "http://localhost:26792/home/SaveImage",
            type: "POST",

            data: formdata,
        processData: false,
        contentType: false


        });

    }
  </script>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1 /jquery.min.js"></script>


</body>
</html>

第4步

用

替换家庭控制器

 public class HomeController : Controller
{
    public ActionResult Index()
    {

         string[] allimage = System.IO.Directory.GetFiles(Server.MapPath("~/Content/Images/"));
        if (allimage.Length>0)
        {
            List<string> base64text = new List<string>();
            foreach (var item in allimage)
            {
                base64text.Add(System.IO.File.ReadAllText(item.ToString()));
            }
            ViewBag.Images = base64text;
        }

        return View();
    }


    [HttpPost]

    public void SaveImage(string base64image)
    {
      System.IO.File.WriteAllText(Server.MapPath("~/Content/Images/" + DateTime.Now.ToString("yyyyMMdd_hhmmss") + ".txt"), base64image);
    }
}

最后用

替换Index.html

<h2>Capture images</h2>

 @foreach (var item in ViewBag.Images)
 {
   <img src="@item" />
 }

注意

此代码将在每5秒后从网络摄像头捕获照片并将其保存到服务器，因为文本文件由base64编码组成，然后索引操作读取它们并显示为img src。

Answer 2

WebRTC标准+使用WebSockets / AJAX。

在Asp.Net MVC中通过网络摄像头捕获图像

2 个答案: