Using cfimage to create thumbnails
I have been playing around with the new cfimage tag in coldfusion 8. I am very impressed with the resize capability. Coldfusion 8 seemed to do a great job resizing my images into thumbnails. I created a tutorial here.
Here is a little bit of code to create thumbnails.
<cfimage action="info" structname="imagetemp" source="Path to your image">
<cfset x=min(150/imagetemp.width, 113/imagetemp.height)>
<cfset newwidth = x*imagetemp.width>
<cfset newheight = x*imagetemp.height>
<cfimage action="resize" source="#Path to your image#" width="#newwidth#" height="#newheight#" destination="#thumbnail destination#">
<cfset x=min(150/imagetemp.width, 113/imagetemp.height)>
<cfset newwidth = x*imagetemp.width>
<cfset newheight = x*imagetemp.height>
<cfimage action="resize" source="#Path to your image#" width="#newwidth#" height="#newheight#" destination="#thumbnail destination#">
Update: My Using CFIMAGE to Generate Thumbnails tutorial was published at learncf.com
I just started playing with this, too, and I am both impressed (at quality and speed) and relieved (at no longer jumping through extraneous hoops for images!).
I put up a little upload-resizer demo here
http://mredesign.com/demos/cfimage-example/
(no tutorial, though)
You might want to look into the imageScaleToFit() function. The "resize" option doesn't keep proportion, where the imageScaleToFit() function does.