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{ "id": 18951, "url": "https://patchwork.libcamera.org/api/1.1/patches/18951/?format=api", "web_url": "https://patchwork.libcamera.org/patch/18951/", "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": "<20230823120915.18621-2-david.plowman@raspberrypi.com>", "date": "2023-08-23T12:09:11", "name": "[libcamera-devel,v2,1/5] ipa: rpi: histogram: Add interBinMean()", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": false, "hash": "0fe24a22affc8b48f66507a8ae46f849a586d373", "submitter": { "id": 42, "url": "https://patchwork.libcamera.org/api/1.1/people/42/?format=api", "name": "David Plowman", "email": "david.plowman@raspberrypi.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/18951/mbox/", "series": [ { "id": 4006, "url": "https://patchwork.libcamera.org/api/1.1/series/4006/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=4006", "date": "2023-08-23T12:09:10", "name": "Multi-channel AGC", "version": 2, "mbox": "https://patchwork.libcamera.org/series/4006/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/18951/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/18951/checks/", "tags": {}, "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 ABBA7C3262\n\tfor <parsemail@patchwork.libcamera.org>;\n\tWed, 23 Aug 2023 12:09:23 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 09076627DF;\n\tWed, 23 Aug 2023 14:09:22 +0200 (CEST)", "from mail-wm1-x333.google.com (mail-wm1-x333.google.com\n\t[IPv6:2a00:1450:4864:20::333])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 020A560379\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tWed, 23 Aug 2023 14:09:20 +0200 (CEST)", "by mail-wm1-x333.google.com with SMTP id\n\t5b1f17b1804b1-400a087b0bfso1483915e9.2\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tWed, 23 Aug 2023 05:09:20 -0700 (PDT)", "from pi4-davidp.pitowers.org\n\t([2a00:1098:3142:14:2bce:64d6:1a5c:49a2])\n\tby smtp.gmail.com with ESMTPSA id\n\tu1-20020a7bcb01000000b003fefcbe7fa8sm3800589wmj.28.2023.08.23.05.09.18\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tWed, 23 Aug 2023 05:09:18 -0700 (PDT)" ], "DKIM-Signature": [ "v=1; 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dkim=pass (2048-bit key; \n\tunprotected) header.d=raspberrypi.com\n\theader.i=@raspberrypi.com\n\theader.b=\"s3UX7Q5u\"; dkim-atps=neutral", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20221208; t=1692792559; x=1693397359;\n\th=content-transfer-encoding:mime-version:references:in-reply-to\n\t:message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc\n\t:subject:date:message-id:reply-to;\n\tbh=u7iKFr8D3j7b58GG5UKdV0vUoX70DBmLHHZQRY3Vb7Y=;\n\tb=NgX+hJMrLm4jMEVmfjU3WUuzS5W1H/HfKBGz/u9rVOLAurIVFsFQKcTnrOOOLsXetk\n\tA6rOXgwD0ZsjdXA1862L/RLgXTk05QIcR+CP9wrdrhvZiRYhxmvPMa4AZzkuVK/9RAuz\n\tsMUepzmMl3qieyrFTA0ik3OE94C+B4aFquT5oRLvOeuDTbaOeM3cTI2DCFwp/I9UowPO\n\t1i7Hkx+Elb8gyHDUC4sX1KjMwO1cs3stpCKrcy9h9DsZ0wUpRM3lW76ByAKsTgyiXyXC\n\tM1oP8NIB8FxNOlPrTggR8datcJ2ieBKmSb+Jumq2ngdR1CKq2BE7JncDxmuMuLpKZLHp\n\tTCRg==", "X-Gm-Message-State": "AOJu0YwWGL9kkUHF0RgTU98DRfjorlMhDRCIWRpQFwBO5ksG2OxZPzg6\n\tX4HGZUbqLURcu7jRggvlm3CoeM4LhlkfHt0Y+UI=", "X-Google-Smtp-Source": "AGHT+IHK+5iGBnSJUn36Yv2dlGlKUTsseI0Hur4wG0Z76cgmyh4Y1hb9Ec6r7ti9Q8qkr+HAbEFF1g==", "X-Received": "by 2002:a05:600c:2307:b0:3fe:1cac:37d5 with SMTP id\n\t7-20020a05600c230700b003fe1cac37d5mr9871084wmo.4.1692792559221; \n\tWed, 23 Aug 2023 05:09:19 -0700 (PDT)", "To": "libcamera-devel@lists.libcamera.org", "Date": "Wed, 23 Aug 2023 13:09:11 +0100", "Message-Id": "<20230823120915.18621-2-david.plowman@raspberrypi.com>", "X-Mailer": "git-send-email 2.30.2", "In-Reply-To": "<20230823120915.18621-1-david.plowman@raspberrypi.com>", "References": "<20230823120915.18621-1-david.plowman@raspberrypi.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v2 1/5] ipa: rpi: histogram: Add\n\tinterBinMean()", "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>", "From": "David Plowman via libcamera-devel <libcamera-devel@lists.libcamera.org>", "Reply-To": "David Plowman <david.plowman@raspberrypi.com>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "From: Naushir Patuck <naush@raspberrypi.com>\n\nAdd a new helper function Histogram::interBinMean() that essentially\nreplaces the existing Histogram::interQuantileMean() logic but working on\nbins instead.\n\nRework the interQuantileMean() to call into interBinMean() with the\nappropriate convertion from quatiles to bins.\n\nSigned-off-by: Naushir Patuck <naush@raspberrypi.com>\nReviewed-by: David Plowman <david.plowman@raspberrypi.com>\n---\n src/ipa/rpi/controller/histogram.cpp | 22 ++++++++++++++--------\n src/ipa/rpi/controller/histogram.h | 2 ++\n 2 files changed, 16 insertions(+), 8 deletions(-)", "diff": "diff --git a/src/ipa/rpi/controller/histogram.cpp b/src/ipa/rpi/controller/histogram.cpp\nindex 16a9207f..0a27ba2c 100644\n--- a/src/ipa/rpi/controller/histogram.cpp\n+++ b/src/ipa/rpi/controller/histogram.cpp\n@@ -45,20 +45,26 @@ double Histogram::quantile(double q, int first, int last) const\n \treturn first + frac;\n }\n \n-double Histogram::interQuantileMean(double qLo, double qHi) const\n+double Histogram::interBinMean(double binLo, double binHi) const\n {\n-\tassert(qHi > qLo);\n-\tdouble pLo = quantile(qLo);\n-\tdouble pHi = quantile(qHi, (int)pLo);\n+\tassert(binHi > binLo);\n \tdouble sumBinFreq = 0, cumulFreq = 0;\n-\tfor (double pNext = floor(pLo) + 1.0; pNext <= ceil(pHi);\n-\t pLo = pNext, pNext += 1.0) {\n-\t\tint bin = floor(pLo);\n+\tfor (double binNext = floor(binLo) + 1.0; binNext <= ceil(binHi);\n+\t binLo = binNext, binNext += 1.0) {\n+\t\tint bin = floor(binLo);\n \t\tdouble freq = (cumulative_[bin + 1] - cumulative_[bin]) *\n-\t\t\t (std::min(pNext, pHi) - pLo);\n+\t\t\t (std::min(binNext, binHi) - binLo);\n \t\tsumBinFreq += bin * freq;\n \t\tcumulFreq += freq;\n \t}\n \t/* add 0.5 to give an average for bin mid-points */\n \treturn sumBinFreq / cumulFreq + 0.5;\n }\n+\n+double Histogram::interQuantileMean(double qLo, double qHi) const\n+{\n+\tassert(qHi > qLo);\n+\tdouble pLo = quantile(qLo);\n+\tdouble pHi = quantile(qHi, (int)pLo);\n+\treturn interBinMean(pLo, pHi);\n+}\ndiff --git a/src/ipa/rpi/controller/histogram.h b/src/ipa/rpi/controller/histogram.h\nindex 6b3e3a9e..e2c5509b 100644\n--- a/src/ipa/rpi/controller/histogram.h\n+++ b/src/ipa/rpi/controller/histogram.h\n@@ -38,6 +38,8 @@ public:\n \tuint64_t total() const { return cumulative_[cumulative_.size() - 1]; }\n \t/* Cumulative frequency up to a (fractional) point in a bin. */\n \tuint64_t cumulativeFreq(double bin) const;\n+\t/* Return the mean value between two (fractional) bins. */\n+\tdouble interBinMean(double binLo, double binHi) const;\n \t/*\n \t * Return the (fractional) bin of the point q (0 <= q <= 1) through the\n \t * histogram. Optionally provide limits to help.\n", "prefixes": [ "libcamera-devel", "v2", "1/5" ] }