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{ "id": 20049, "url": "https://patchwork.libcamera.org/api/patches/20049/?format=api", "web_url": "https://patchwork.libcamera.org/patch/20049/", "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": "<20240516124150.219054-3-stefan.klug@ideasonboard.com>", "date": "2024-05-16T12:41:49", "name": "[2/3] libcamera: Add gamma control id", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "401be8990e4742ab3a78a419cd55186102de3b97", "submitter": { "id": 184, "url": "https://patchwork.libcamera.org/api/people/184/?format=api", "name": "Stefan Klug", "email": "stefan.klug@ideasonboard.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/20049/mbox/", "series": [ { "id": 4310, "url": "https://patchwork.libcamera.org/api/series/4310/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=4310", "date": "2024-05-16T12:41:47", "name": "libcamera: Add gamma control for rkisp1", "version": 1, "mbox": "https://patchwork.libcamera.org/series/4310/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/20049/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/20049/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 86B02BDE6B\n\tfor <parsemail@patchwork.libcamera.org>;\n\tThu, 16 May 2024 12:43:10 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 3D21863482;\n\tThu, 16 May 2024 14:43:10 +0200 (CEST)", "from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id BAA396347E\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tThu, 16 May 2024 14:43:08 +0200 (CEST)", "from ideasonboard.com (unknown\n\t[IPv6:2a00:6020:448c:6c00:3fef:fa64:e35:24d4])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 514839D5;\n\tThu, 16 May 2024 14:43:00 +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=\"NZ6tDFN0\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1715863380;\n\tbh=NBUQGgzgDnhnzt+SHSpduQBh+VyD7Ldv5dWg7jK4Qn4=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=NZ6tDFN0y9P9J3vS67J7LaIz7JnCFAAnnN7ps7W3bYK5CQoOcDFMHSwJhRCu1qiRU\n\tfK2R008mGm0+DODZ3KdPA78Dn76k3ajJAC1cCLDHrXZhznZYLsO8WTehgI7b0/SDYQ\n\ty/33U+RCViSTODQTUPbQhKL3NIWJfs1KWzdku4TQ=", "From": "Stefan Klug <stefan.klug@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Cc": "Stefan Klug <stefan.klug@ideasonboard.com>", "Subject": "[PATCH 2/3] libcamera: Add gamma control id", "Date": "Thu, 16 May 2024 14:41:49 +0200", "Message-Id": "<20240516124150.219054-3-stefan.klug@ideasonboard.com>", "X-Mailer": "git-send-email 2.40.1", "In-Reply-To": "<20240516124150.219054-1-stefan.klug@ideasonboard.com>", "References": "<20240516124150.219054-1-stefan.klug@ideasonboard.com>", "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": "A camera gamma of roughly 2.2 is necessary to produce correct output\nimages on a standard monitor. Add a control for that.\n\nFurther information is available here:\nhttps://en.wikipedia.org/wiki/SRGB\nhttps://www.cambridgeincolour.com/tutorials/gamma-correction.htm\n\nSigned-off-by: Stefan Klug <stefan.klug@ideasonboard.com>\n---\n src/libcamera/control_ids_core.yaml | 6 ++++++\n 1 file changed, 6 insertions(+)", "diff": "diff --git a/src/libcamera/control_ids_core.yaml b/src/libcamera/control_ids_core.yaml\nindex bf1f1a83..43b85135 100644\n--- a/src/libcamera/control_ids_core.yaml\n+++ b/src/libcamera/control_ids_core.yaml\n@@ -243,6 +243,12 @@ controls:\n Specify a fixed contrast parameter. Normal contrast is given by the\n value 1.0; larger values produce images with more contrast.\n \n+ - Gamma:\n+ type: float\n+ description: |\n+ Specify a fixed gamma value. Default is 2.2 which closely mimics sRGB\n+ gamma. Note that this is camera gamma, so it is applied as 1.0/gamma\n+\n - Lux:\n type: float\n description: |\n", "prefixes": [ "2/3" ] }