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{ "id": 24640, "url": "https://patchwork.libcamera.org/api/1.1/covers/24640/?format=api", "web_url": "https://patchwork.libcamera.org/cover/24640/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/1.1/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": "<20251014142427.3107490-1-stefan.klug@ideasonboard.com>", "date": "2025-10-14T14:24:15", "name": "[v1,0/4] libipa: agc: Fix constraints yTarget handling and add PWL support", "submitter": { "id": 184, "url": "https://patchwork.libcamera.org/api/1.1/people/184/?format=api", "name": "Stefan Klug", "email": "stefan.klug@ideasonboard.com" }, "mbox": "https://patchwork.libcamera.org/cover/24640/mbox/", "series": [ { "id": 5502, "url": "https://patchwork.libcamera.org/api/1.1/series/5502/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=5502", "date": "2025-10-14T14:24:15", "name": "libipa: agc: Fix constraints yTarget handling and add PWL support", "version": 1, "mbox": "https://patchwork.libcamera.org/series/5502/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/covers/24640/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 E7FBBBE080\n\tfor <parsemail@patchwork.libcamera.org>;\n\tTue, 14 Oct 2025 14:24:34 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 19684605F8;\n\tTue, 14 Oct 2025 16:24:34 +0200 (CEST)", "from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 12358605DF\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tTue, 14 Oct 2025 16:24:32 +0200 (CEST)", "from ideasonboard.com (unknown\n\t[IPv6:2a00:6020:448c:6c00:61fb:8e55:ff1e:be62])\n\tby perceval.ideasonboard.com (Postfix) with UTF8SMTPSA id 9A664741;\n\tTue, 14 Oct 2025 16:22:53 +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=\"tdP8Fv5r\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1760451773;\n\tbh=J00LNuZDCG1mnww8Bb52KG2EfgICTeTylX+4r88SfdE=;\n\th=From:To:Cc:Subject:Date:From;\n\tb=tdP8Fv5rjEssSrVHpGjBqwQhTPO6I53pkHolwKiKm/Eze2LqmgRs0xrzvrnqyiQK1\n\t3omjNOtYJY7yepO/TsfisbKD67PUK+gx7NMWjmvczQOQMscECsSk6+scWVArxzHVdv\n\tD0greeeIy4HlFE11X5qr582jAzAJkuejvh0JVi8o=", "From": "Stefan Klug <stefan.klug@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Cc": "Stefan Klug <stefan.klug@ideasonboard.com>", "Subject": "[PATCH v1 0/4] libipa: agc: Fix constraints yTarget handling and add\n\tPWL support", "Date": "Tue, 14 Oct 2025 16:24:15 +0200", "Message-ID": "<20251014142427.3107490-1-stefan.klug@ideasonboard.com>", "X-Mailer": "git-send-email 2.48.1", "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\nThis series introduces support for specifying the\nrelativeLuminanceTarget based on the current lux level by using a PWL\nfor the mapping. The typical use case is to ensure that images in a\nbright environment are regulated a tad brighter than images taken in a\ndark environment. This is a very subjective setting and should thereofre\nleft for the customer. Mainlining this feature was already tried here\n[1] but got rejected at that time because there was no direct user of\nit. Meanwhile the lux algorithm got upstreamed and we have customers\nthat actually miss that feature. So I start another try of upstreaming\nit (Patches 1-2).\n\nDuring implementation it turned out that the yTarget of AGC constraints\nnever worked at all. So patches 3-4 fix that and also add PWL support\nfor the constraints which is sensible to do if we support it for the\nrelativeLuminanceTarget.\n\nBest regards,\nStefan\n\nStefan Klug (4):\n ipa: libipa: pwl: Add swap() function\n ipa: libipa: agc_mean_luminance: Change luminance target to piecewise\n linear function\n ipa: libipa: pwl: Add construction from initializer_list\n ipa: libipa: agc_mean_luminance: Fix yTarget handling in constraints\n\n src/ipa/libipa/agc_mean_luminance.cpp | 113 ++++++++++++++++++++++----\n src/ipa/libipa/agc_mean_luminance.h | 16 ++--\n src/ipa/libipa/pwl.cpp | 25 ++++++\n src/ipa/libipa/pwl.h | 2 +\n src/ipa/rkisp1/algorithms/agc.cpp | 1 +\n src/ipa/rkisp1/algorithms/wdr.cpp | 3 +-\n 6 files changed, 136 insertions(+), 24 deletions(-)" }