Hi , I need to take picture from camera using vf page in salesforce .but , i need to restrict picture from gallery. 
by default gallery is available  along with camera .can anyone guide me?

[sourcecode language=”java”]
<apex:page controller=”CreateSnap” standardStylesheets=”false” showHeader=”false”>
<apex:includeScript value=”{!$Resource.ExifJavaScript}”/>
<script> function getGPSdata(e) {
EXIF.getData(e.files[0], function() {
var obj = {};
obj.Latitude = EXIF.getTag(this, “GPSLatitude”);
obj.Longitude = EXIF.getTag(this, “GPSLongitude”);
obj.CreatedDate = EXIF.getTag(this,”DateTime”);
document.querySelectorAll(‘[id$=”desc”]’)[0].value = JSON.stringify(obj); });}
</script>
<div class=”container” style=”background-color:#E6E6FA”>
<div class=”row clearfix”>
<div class=”col-md-12 column”>
<div class=”jumbotron”>
<h1> Camera Access in Visualforce using HTML 5</h1>
</div>
<div class=”panel panel-warning”>
<div class=”panel-heading”>
<apex:form >
<apex:inputFile value=”{!cont.VersionData}” accept=”image/*;capture=camera” filename=”{!cont.Title}” onchange=”getGPSdata(this)”/>
<apex:inputTextarea value=”{!cont.description}” id=”desc” rows=”7″ cols=”25″ disabled=”true” >
<apex:commandButton StyleClass=”btn btn-danger” action=”{!saveFile}” value=”Save File” >
</apex:form></div>
</div>
</div>
</div>
</div>
</apex:page>
[/sourcecode]
APEX CLASS:
[sourcecode language=”java”]
public class CreateSnap{
public ContentVersion cont {get;set;}
public CreateSnap() {
cont = new ContentVersion();
}
public PageReference saveFile()
{
//PathOnClient is Mandatory
cont.PathOnClient = cont.title;
cont.Description = cont.Description;
//By default Origin value is “C” that means Content must be enabled in Org, so we need to explicitly set Origin as H
cont.Origin = ‘H’;
insert cont;
//redirect to path where file is saved
return new PageReference(‘/’+cont.id);
}
}

thanks in advance