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{ "id": 13900, "url": "https://patchwork.libcamera.org/api/patches/13900/?format=api", "web_url": "https://patchwork.libcamera.org/patch/13900/", "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": "<20210923081625.60276-9-jeanmichel.hautbois@ideasonboard.com>", "date": "2021-09-23T08:16:21", "name": "[libcamera-devel,08/12] ipa: ipu3: awb: Correct the gain multipliers", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "eba6c607fdbff7a0292a8528ad4725e95404e562", "submitter": { "id": 75, "url": "https://patchwork.libcamera.org/api/people/75/?format=api", "name": "Jean-Michel Hautbois", "email": "jeanmichel.hautbois@ideasonboard.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/13900/mbox/", "series": [ { "id": 2548, "url": "https://patchwork.libcamera.org/api/series/2548/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=2548", "date": "2021-09-23T08:16:13", "name": "Improve ImgU statistics usage", "version": 1, "mbox": "https://patchwork.libcamera.org/series/2548/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/13900/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/13900/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 41692BF01C\n\tfor <parsemail@patchwork.libcamera.org>;\n\tThu, 23 Sep 2021 08:16:44 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 008946919A;\n\tThu, 23 Sep 2021 10:16:43 +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 D754869196\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tThu, 23 Sep 2021 10:16:31 +0200 (CEST)", "from tatooine.ideasonboard.com (unknown\n\t[IPv6:2a01:e0a:169:7140:392e:dcd2:2bf6:d61c])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 8B7F3E52;\n\tThu, 23 Sep 2021 10:16:31 +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=\"rZmvyqTF\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1632384991;\n\tbh=OdYu2APJ2kVO9dPcr+oIt7r8HIWBLP8lE07g1Vf6XRo=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=rZmvyqTF9WN8N7wsq9M+xne+WTFZuUtMIurnIBNormMlWJTznr0DcTzM4yKTe9OXJ\n\t6CH7sTOoyUT64JhiGekMjQMIa6PoUizHZM4kMZAC5qMjhoWppoI7jnO28EJc5149uO\n\trfx4RJOLfq6S8eKYxyoQAVSq/ctQ9gjSQxovo+vk=", "From": "Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Date": "Thu, 23 Sep 2021 10:16:21 +0200", "Message-Id": "<20210923081625.60276-9-jeanmichel.hautbois@ideasonboard.com>", "X-Mailer": "git-send-email 2.30.2", "In-Reply-To": "<20210923081625.60276-1-jeanmichel.hautbois@ideasonboard.com>", "References": "<20210923081625.60276-1-jeanmichel.hautbois@ideasonboard.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH 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>\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 800d023c..8a926691 100644\n--- a/src/ipa/ipu3/algorithms/awb.cpp\n+++ b/src/ipa/ipu3/algorithms/awb.cpp\n@@ -313,6 +313,7 @@ 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/* Green gains should not be touched and considered 1. */\n \tasyncResults_.greenGain = 1.0;\n \tasyncResults_.blueGain = blueGain;\n }\n@@ -376,15 +377,11 @@ 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/* 8192 is the multiplier for a gain of 1.0 */\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", "08/12" ] }