{"id":23087,"url":"https://patchwork.libcamera.org/api/covers/23087/?format=json","web_url":"https://patchwork.libcamera.org/cover/23087/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20250401123633.58887-1-stefan.klug@ideasonboard.com>","date":"2025-04-01T12:36:08","name":"[v2,0/5] Fix histogram for some (corner) cases","submitter":{"id":184,"url":"https://patchwork.libcamera.org/api/people/184/?format=json","name":"Stefan Klug","email":"stefan.klug@ideasonboard.com"},"mbox":"https://patchwork.libcamera.org/cover/23087/mbox/","series":[{"id":5099,"url":"https://patchwork.libcamera.org/api/series/5099/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=5099","date":"2025-04-01T12:36:08","name":"Fix histogram for some (corner) cases","version":2,"mbox":"https://patchwork.libcamera.org/series/5099/mbox/"}],"comments":"https://patchwork.libcamera.org/api/covers/23087/comments/","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 39353C3213\n\tfor ;\n\tTue, 1 Apr 2025 12:36:39 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 786B168981;\n\tTue, 1 Apr 2025 14:36:38 +0200 (CEST)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id C708A68947\n\tfor ;\n\tTue, 1 Apr 2025 14:36:37 +0200 (CEST)","from ideasonboard.com (unknown\n\t[IPv6:2a00:6020:448c:6c00:14c7:4fcc:495b:719f])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 80DD16F9;\n\tTue, 1 Apr 2025 14:34:45 +0200 (CEST)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"At1ao7Kg\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1743510885;\n\tbh=uksJ+BbnDNFPjbGwQAb7CA98DUZvTbwmFhloWJEmolY=;\n\th=From:To:Cc:Subject:Date:From;\n\tb=At1ao7KgJd5ylVQ7tyFt42jp3SJVqLOaWKhfEPTxzEsFcisGcczyxTZks3wgEPJxb\n\tumlFXI6hS+HQJsFG2axlj2gI1q2DnJ8XBIqSSmyQt22XhTAvsYYLMrOcClg1DYf62L\n\twJSY7c+yOFcmxhUHU1PxFH7QSbRaOkiPaRP1kxAs=","From":"Stefan Klug ","To":"libcamera-devel@lists.libcamera.org","Cc":"Stefan Klug ","Subject":"[PATCH v2 0/5] Fix histogram for some (corner) cases","Date":"Tue, 1 Apr 2025 14:36:08 +0200","Message-ID":"<20250401123633.58887-1-stefan.klug@ideasonboard.com>","X-Mailer":"git-send-email 2.43.0","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Hi all,\n\nduring my work on WDR I stumbled over a few non-linearities when dealing\nwith small inter quantile mean ranges. These led to hard to handle\noscillations. This series adds a testcase for the histogram class and\nfixes the related issues.\n\nPatch 1 adds the basic tests that pass with the current implementation.\n\nPatch 2-3 fix issues in the quantile() implementation and add\ncorresponding tests.\n\nPatch 4-5 fix issues in the interQuantileMean() implementation and also\nadd tests.\n\nBest regards,\nStefan\n\nChanges in v2:\n- Add failing tests before the fix patches\n- Include stylistic changes from review\n\n\nStefan Klug (5):\n test: ipa: libipa: Add histogram tests\n test: ipa: libipa: histogram: Add tests for quantile() returning a\n fraction\n libipa: histogram: Fix quantile() calculation for fractional results\n test: ipa: libipa: histogram: Add tests for small inter quantile mean\n ranges\n libipa: histogram: Fix interQuantileMean() for small ranges\n\n src/ipa/libipa/histogram.cpp | 42 ++++++++++++++--------\n test/ipa/libipa/histogram.cpp | 66 +++++++++++++++++++++++++++++++++++\n test/ipa/libipa/meson.build | 4 ++-\n 3 files changed, 96 insertions(+), 16 deletions(-)\n create mode 100644 test/ipa/libipa/histogram.cpp"}