如何在ASP.NET中通过网络摄像头捕获时更改图像的默认高度和宽度 [英] How to change the default height and width of image while capturing through webcam in ASP.NET
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问题描述
我正在开展一个用户将通过网络摄像头拍摄照片的项目。然后它会在点击捕获按钮时保存在文件夹中。
用于网络摄像头，我正在使用jquery插件 - jquery.webcam.js
但是当点击捕获按钮时，它会捕获320 X 200尺寸的图像。
我正在使用高清网络摄像头拍摄图像。
如何在高维位置更改此图片。
求助。
我尝试了什么：
i am working on a project where user will capture his photo through webcam. and then it will save in a folder when click on the capture button.
for webcam, i am using the jquery plugin - jquery.webcam.js
but when click on the capture button, it capture the image in 320 X 200 Dimensions.
i am using the hd webcam for capturing images.
how to change this image in high dimensions.
please help.
What I have tried:
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
<style type="text/css">
body
{
font-family: Arial;
font-size: 10pt;
}
</style>
</head>
<body>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script src='<%=ResolveUrl("~/Webcam_Plugin/jquery.webcam.js") %>' type="text/javascript"></script>
<script type="text/javascript">
var pageUrl = '<%=ResolveUrl("~/VB.aspx") %>';
$(function () {
jQuery("#webcam").webcam({
width: 1024,
height: 768,
mode: "save",
swffile: '<%=ResolveUrl("~/Webcam_Plugin/jscam.swf") %>',
debug: function (type, status) {
$('#camStatus').append(type + ": " + status + '<br /><br />');
},
onSave: function (data) {
$.ajax({
type: "POST",
url: pageUrl + "/GetCapturedImage",
data: '',
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (r) {
$("[id*=imgCapture]").css("visibility", "visible");
$("[id*=imgCapture]").attr("src", r.d);
},
failure: function (response) {
alert(response.d);
}
});
},
onCapture: function () {
webcam.save(pageUrl);
}
});
});
function Capture() {
webcam.capture();
return false;
}
</script>
<form id="form1" runat="server">
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td align="center">
Live Camera
</td>
<td>
</td>
<td align="center">
Captured Picture
</td>
</tr>
<tr>
<td>
<div id="webcam">
</div>
</td>
<td>
</td>
<td>
<asp:Image ID="imgCapture" runat="server" Style="visibility: hidden; width: 320px;
height: 240px" />
</td>
</tr>
</table>
<br />
<asp:Button ID="btnCapture" Text="Capture" runat="server" OnClientClick="return Capture();" />
<br />
<span id="camStatus"></span>
</form>
</body>
</html>
Imports System.IO
Imports System.Web.Services
Partial Class VB
Inherits System.Web.UI.Page
Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
If Not Me.IsPostBack Then
If Request.InputStream.Length > 0 Then
Using reader As New StreamReader(Request.InputStream)
Dim hexString As String = Server.UrlEncode(reader.ReadToEnd())
Dim imageName As String = DateTime.Now.ToString("dd-MM-yy hh-mm-ss")
Dim imagePath As String = String.Format("~/Captures/{0}.png", imageName)
File.WriteAllBytes(Server.MapPath(imagePath), ConvertHexToBytes(hexString))
Session("CapturedImage") = ResolveUrl(imagePath)
End Using
End If
End If
End Sub
Private Shared Function ConvertHexToBytes(hex As String) As Byte()
Dim bytes As Byte() = New Byte(hex.Length / 2 - 1) {}
For i As Integer = 0 To hex.Length - 1 Step 2
bytes(i / 2) = Convert.ToByte(hex.Substring(i, 2), 16)
Next
Return bytes
End Function
<WebMethod(EnableSession:=True)> _
Public Shared Function GetCapturedImage() As String
Dim url As String = HttpContext.Current.Session("CapturedImage").ToString()
HttpContext.Current.Session("CapturedImage") = Nothing
Return url
End Function
End Class
推荐答案
（ function （） {
jQuery（ ＃webcam）。webcam（{
width： 1024 ，
height： 768 ，
模式： save，
swffile：' <％= ResolveUrl（〜/ Webcam_Plugin / jscam.swf）％>'，
debug： function （类型，状态）{
(function () { jQuery("#webcam").webcam({ width: 1024, height: 768, mode: "save", swffile: '<%=ResolveUrl("~/Webcam_Plugin/jscam.swf") %>', debug: function (type, status) {
（' ＃camStatus').append(type + ： + status + ' < br />< br />'）;
}，
onSave： function （data）{
('#camStatus').append(type + ": " + status + '<br /><br />'); }, onSave: function (data) {
.ajax（{
类型： POST，
url：pageUrl + / GetCapturedImage，
data：' '，
contentType： application / json; charset = utf -8，
dataType： json，
成功：功能（r）{
.ajax({ type: "POST", url: pageUrl + "/GetCapturedImage", data: '', contentType: "application/json; charset=utf-8", dataType: "json", success: function (r) {
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