Excluding directories from access log

I use the AccessLogValve to do standard logging for requests to my site. However, I find that image file requests dominate the log file. Is there way to exclude an entire directory from printing to the access log when its files are requested? I looked at the docs and all I could find was the

Re: Excluding directories from access log

The condition attribute will work. You need to write a filter to set or clear the variable that the AccessLogValve's condition looks for. -Tim footh wrote: I use the AccessLogValve to do standard logging for requests to my site. However, I find that image file requests dominate the log file. Is