From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on yquem.inria.fr X-Spam-Level: X-Spam-Status: No, score=0.1 required=5.0 tests=AWL autolearn=disabled version=3.1.3 X-Original-To: caml-list@yquem.inria.fr Delivered-To: caml-list@yquem.inria.fr Received: from mail4-relais-sop.national.inria.fr (mail4-relais-sop.national.inria.fr [192.134.164.105]) by yquem.inria.fr (Postfix) with ESMTP id C0616BC37 for ; Sun, 27 Sep 2009 19:43:27 +0200 (CEST) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Au8CAD5Bv0rRVlk/gmdsb2JhbACbAwEBCwsIBxUDtyKEHgU X-IronPort-AV: E=Sophos;i="4.44,461,1249250400"; d="scan'208";a="47382909" Received: from elasmtp-junco.atl.sa.earthlink.net ([209.86.89.63]) by mail4-smtp-sop.national.inria.fr with ESMTP; 27 Sep 2009 19:43:27 +0200 Received: from [69.254.201.214] (helo=[10.0.1.2]) by elasmtp-junco.atl.sa.earthlink.net with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.67) (envelope-from ) id 1MrxmQ-0004VK-9m for caml-list@inria.fr; Sun, 27 Sep 2009 13:43:26 -0400 Message-Id: From: David McClain To: caml-list@inria.fr Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Apple Message framework v936) Subject: HLVM stuff Date: Sun, 27 Sep 2009 10:43:24 -0700 X-Mailer: Apple Mail (2.936) X-ELNK-Trace: 7a0ab3eafc8cf994b22988ad1c62733440683398e744b8a40f6a076bc7af01eb81e454147a8ad31c666fa475841a1c7a350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 69.254.201.214 X-Spam: no; 0.00; dispatching:01 infrared:98 polymorphic:01 stack:01 stacks:03 dbm:03 dbm:03 fft:04 perhaps:05 perhaps:05 images:93 images:93 stuff:09 majority:89 pixel:10 ... as a specific example, I remember dealing with stacks of images taken from an infrared imaging sensor -- perhaps 256 images, each of which is, say 512 x 512 pixels. I needed to obtain median pixel values from the stack and produce one "median image", as well as perform thresholding, masking, perhaps some dilation and erosion. And, also get the image 2-D FFT image. So there we are dealing with an aggregate of 2^26 8-bit pixel values. Surely, the majority of time is spent processing pixels, and not dispatching over some polymorphic type... Dr. David McClain dbm@refined-audiometrics.com