Umbraco 4.7 Insert Macro Security Exception

After publishing Umbraco 4.7 on a shared host, I was not able to inset macro in Tiny Editor.

The Error was something like this:

Server Error in '/' Application.

Security Exception

Description: The application attempted to perform an operation not allowed by the security policy.  To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.

Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.SecurityPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

Source Error:

[No relevant source lines]

Source File: App_Web_insertmacro.aspx.43b758d9.ef1yo35r.0.cs    Line: 0

Stack Trace:

[SecurityException: Request for the permission of type 'System.Security.Permissions.SecurityPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.]    System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet) +0    System.Security.CodeAccessSecurityEngine.Check(CodeAccessPermission cap, StackCrawlMark& stackMark) +31    System.Security.CodeAccessPermission.Demand() +46    System.Net.ServicePointManager.set_ServerCertificateValidationCallback(RemoteCertificateValidationCallback value) +54    umbraco.macro.MacroContentByHttp(Int32 PageID, Guid PageVersion, Hashtable attributes) +899    umbraco.presentation.tinymce3.insertMacro.renderMacro_Click(Object sender, EventArgs e) +1031    System.EventHandler.Invoke(Object sender, EventArgs e) +0    System.Web.UI.WebControls.Button.OnClick(EventArgs e) +118    System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +112    System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10    System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13    System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36    System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +8431    System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +253    System.Web.UI.Page.ProcessRequest() +78    System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +21    System.Web.UI.Page.ProcessRequest(HttpContext context) +49    ASP.umbraco_plugins_tinymce3_insertmacro_aspx.ProcessRequest(HttpContext context) in App_Web_insertmacro.aspx.43b758d9.ef1yo35r.0.cs:0    System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +100    System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272 

This error can be eliminated by turning Off  "Render Content in Editor" in Macro Properties.

HOG (Histogram of Oriented Gradients) with Matlab Implementation

Finally, I got time to blog again. I have moved this post to its new location on my site and I maintain the code there afterwards. Here is  the link:

MATLAB implementation of HOG (Histogram of Oriented Gradients)

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HOG introduced by (Dalal & Triggs, 2005) is a feature set for robust visual object recognition. 

They used HOG in human detection as a test case for their experiments. They reviewed existing edge and gradient based descriptors and showed experimentally that grids of Histograms of Oriented Gradient (HOG) descriptors had better performance among existing feature sets for human detection. 

They studied the influence of each stage of the computation on performance, concluding that, fine-scale gradients, fine orientation binning, relatively coarse spatial binning and high-quality local contrast normalization in overlapping descriptor blocks are all important for good results. 

I have implemented this nice feature set in MATLAB and you can download it from here.