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{ "id": 23001, "url": "https://patchwork.libcamera.org/api/covers/23001/?format=api", "web_url": "https://patchwork.libcamera.org/cover/23001/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/projects/1/?format=api", "name": "libcamera", "link_name": "libcamera", "list_id": "libcamera_core", "list_email": "libcamera-devel@lists.libcamera.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20250324170803.103296-1-stefan.klug@ideasonboard.com>", "date": "2025-03-24T17:07:35", "name": "[0/5] Fix histogram for some (corner) cases", "submitter": { "id": 184, "url": "https://patchwork.libcamera.org/api/people/184/?format=api", "name": "Stefan Klug", "email": "stefan.klug@ideasonboard.com" }, "mbox": "https://patchwork.libcamera.org/cover/23001/mbox/", "series": [ { "id": 5077, "url": "https://patchwork.libcamera.org/api/series/5077/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=5077", "date": "2025-03-24T17:07:35", "name": "Fix histogram for some (corner) cases", "version": 1, "mbox": "https://patchwork.libcamera.org/series/5077/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/covers/23001/comments/", "headers": { "Return-Path": "<libcamera-devel-bounces@lists.libcamera.org>", "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 506F3C3213\n\tfor <parsemail@patchwork.libcamera.org>;\n\tMon, 24 Mar 2025 17:08:16 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 45F3F68951;\n\tMon, 24 Mar 2025 18:08:15 +0100 (CET)", "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 EC4856893F\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon, 24 Mar 2025 18:08:13 +0100 (CET)", "from ideasonboard.com (unknown\n\t[IPv6:2a00:6020:448c:6c00:854:5bc6:b2a7:e242])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 344C5455;\n\tMon, 24 Mar 2025 18:06:27 +0100 (CET)" ], "Authentication-Results": "lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"gIZDFq7a\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1742835987;\n\tbh=ekyF1p9TGbcdXbbdAvgVW2OAPFBvhiEo/w3YhNdsQEw=;\n\th=From:To:Cc:Subject:Date:From;\n\tb=gIZDFq7ajAQJFNPKbO8lH/CnFyNVD4HkZhiDYEDr14dVVdCPYqWKfXw0/lA5ceBJY\n\tYQSjvFU68n8fQMbvzjH2ACnL1Fi3zJggVE2xKtB2ARYqCbUGP8u0fM+M8IBMT2Flkw\n\t7mJuN1iO27KbMyQPYVDDby4WG0JQR8mJ4OZ548jg=", "From": "Stefan Klug <stefan.klug@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Cc": "Stefan Klug <stefan.klug@ideasonboard.com>", "Subject": "[PATCH 0/5] Fix histogram for some (corner) cases", "Date": "Mon, 24 Mar 2025 18:07:35 +0100", "Message-ID": "<20250324170803.103296-1-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": "<libcamera-devel.lists.libcamera.org>", "List-Unsubscribe": "<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>", "List-Archive": "<https://lists.libcamera.org/pipermail/libcamera-devel/>", "List-Post": "<mailto:libcamera-devel@lists.libcamera.org>", "List-Help": "<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>", "List-Subscribe": "<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "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\nI added the tests after the fixes, so that I don't have to toggle should_fail\nin the meson.build file all the time (And CI doesn't test every commit anyways).\nTo test that in review, I believe the easiest is to temporarily revert the\ncorresponding fix and see the test fail.\n\nBest regards,\nStefan\n\nStefan Klug (5):\n test: ipa: libipa: Add histogram tests\n libipa: histogram: Fix quantile() calculation for fractional results\n test: ipa: libipa: histogram: Add tests for quantile() returning a\n fraction\n libipa: histogram: Fix interQuantileMean() for small ranges\n test: ipa: libipa: histogram: Add tests for small inter quantile mean\n ranges\n\n src/ipa/libipa/histogram.cpp | 23 ++++++------\n test/ipa/libipa/histogram.cpp | 66 +++++++++++++++++++++++++++++++++++\n test/ipa/libipa/meson.build | 1 +\n 3 files changed, 80 insertions(+), 10 deletions(-)\n create mode 100644 test/ipa/libipa/histogram.cpp" }