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{ "id": 14065, "url": "https://patchwork.libcamera.org/api/1.1/patches/14065/?format=api", "web_url": "https://patchwork.libcamera.org/patch/14065/", "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": "<20211006140041.964542-9-jeanmichel.hautbois@ideasonboard.com>", "date": "2021-10-06T14:00:38", "name": "[libcamera-devel,v3,08/12] ipa: ipu3: awb: Correct the gain multipliers", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": false, "hash": "91f4180dcf544ae0bcb1d8e39cb70d3882f5753c", "submitter": { "id": 75, "url": "https://patchwork.libcamera.org/api/1.1/people/75/?format=api", "name": "Jean-Michel Hautbois", "email": "jeanmichel.hautbois@ideasonboard.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/14065/mbox/", "series": [ { "id": 2605, "url": "https://patchwork.libcamera.org/api/1.1/series/2605/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=2605", "date": "2021-10-06T14:00:30", "name": "Improve ImgU statistics usage", "version": 3, "mbox": "https://patchwork.libcamera.org/series/2605/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/14065/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/14065/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 83BABC323E\n\tfor <parsemail@patchwork.libcamera.org>;\n\tWed, 6 Oct 2021 14:01:13 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 39D08691C9;\n\tWed, 6 Oct 2021 16:01:13 +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 D435E691C5\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tWed, 6 Oct 2021 16:01:02 +0200 (CEST)", "from tatooine.ideasonboard.com (unknown\n\t[IPv6:2a01:e0a:169:7140:843b:c831:54de:6e8c])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 46F25FFD;\n\tWed, 6 Oct 2021 16:01:02 +0200 (CEST)" ], "Authentication-Results": "lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"OG1X8AWO\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1633528862;\n\tbh=3jseKx07R09HLzRif7yei3tfCVJt/so1W8hVpvcQ2Sw=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=OG1X8AWOqc3ZDywxVwd5bQ3Q3tfuS/rLYoyBx1cy79deySJUgVsnFNWWxc64z3ABJ\n\tIExyHGdgBqVM2zoo0ckoPUcWKEKSP0wYpsOZ5dtWYkWOc952WryqMyzslYL9fePR5C\n\ty6g5JYwNm5kdQkgWq38Ywz56a4pHCwthnJtnVOKU=", "From": "Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Date": "Wed, 6 Oct 2021 16:00:38 +0200", "Message-Id": "<20211006140041.964542-9-jeanmichel.hautbois@ideasonboard.com>", "X-Mailer": "git-send-email 2.30.2", "In-Reply-To": "<20211006140041.964542-1-jeanmichel.hautbois@ideasonboard.com>", "References": "<20211006140041.964542-1-jeanmichel.hautbois@ideasonboard.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v3 08/12] ipa: ipu3: awb: Correct the gain\n\tmultipliers", "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": "The gains have a precision u3.13, range [0, 8[ which means that a gain\nmultiplier value of 1.0 is represented as a multiplication by 8192 in\nthe ImgU. Correct the gains as this was misunderstood in the first\nplace.\n\nSigned-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>\nReviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>\nReviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>\n---\n src/ipa/ipu3/algorithms/awb.cpp | 15 ++++++---------\n 1 file changed, 6 insertions(+), 9 deletions(-)", "diff": "diff --git a/src/ipa/ipu3/algorithms/awb.cpp b/src/ipa/ipu3/algorithms/awb.cpp\nindex 1c294f31..2d875d0b 100644\n--- a/src/ipa/ipu3/algorithms/awb.cpp\n+++ b/src/ipa/ipu3/algorithms/awb.cpp\n@@ -317,6 +317,7 @@ void Awb::awbGreyWorld()\n \t/* Color temperature is not relevant in Grey world but still useful to estimate it :-) */\n \tasyncResults_.temperatureK = estimateCCT(sumRed.R, sumRed.G, sumBlue.B);\n \tasyncResults_.redGain = redGain;\n+\t/* Hardcode the green gain to 1.0. */\n \tasyncResults_.greenGain = 1.0;\n \tasyncResults_.blueGain = blueGain;\n }\n@@ -380,15 +381,11 @@ void Awb::prepare(IPAContext &context, ipu3_uapi_params *params)\n \t\t\t\t\t\t\t* params->acc_param.bnr.opt_center.x_reset;\n \tparams->acc_param.bnr.opt_center_sqr.y_sqr_reset = params->acc_param.bnr.opt_center.y_reset\n \t\t\t\t\t\t\t* params->acc_param.bnr.opt_center.y_reset;\n-\t/*\n-\t * Green gains should not be touched and considered 1.\n-\t * Default is 16, so do not change it at all.\n-\t * 4096 is the value for a gain of 1.0\n-\t */\n-\tparams->acc_param.bnr.wb_gains.gr = 16 * context.frameContext.awb.gains.green;\n-\tparams->acc_param.bnr.wb_gains.r = 4096 * context.frameContext.awb.gains.red;\n-\tparams->acc_param.bnr.wb_gains.b = 4096 * context.frameContext.awb.gains.blue;\n-\tparams->acc_param.bnr.wb_gains.gb = 16 * context.frameContext.awb.gains.green;\n+\t/* Convert to u3.13 fixed point values */\n+\tparams->acc_param.bnr.wb_gains.gr = 8192 * context.frameContext.awb.gains.green;\n+\tparams->acc_param.bnr.wb_gains.r = 8192 * context.frameContext.awb.gains.red;\n+\tparams->acc_param.bnr.wb_gains.b = 8192 * context.frameContext.awb.gains.blue;\n+\tparams->acc_param.bnr.wb_gains.gb = 8192 * context.frameContext.awb.gains.green;\n \n \tLOG(IPU3Awb, Debug) << \"Color temperature estimated: \" << asyncResults_.temperatureK;\n \n", "prefixes": [ "libcamera-devel", "v3", "08/12" ] }