Import image file

Hi,

I am using a cfm page to import an image file.

<cfset setEncoding("url","utf-8")>

<cfset setEncoding("form","utf-8")>

<cfif IsDefined("Form.fileData") and IsDefined("Form.fileName")>

<cffile action="upload"

      fileField="Filedata"

      nameconflict="overwrite"

      destination="#application.upload_folder#"

      mode="666"

      result="ret">

</cfif>

It is a way to check for duplicate image file names in the folder?

How can I resize the image to a particular width and height?

Thanks!