{"id":20049,"url":"https://patchwork.libcamera.org/api/patches/20049/?format=json","web_url":"https://patchwork.libcamera.org/patch/20049/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","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libcamera: Add gamma control id","commit_ref":null,"pull_url":null,"state":"superseded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=json","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=json","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":"","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 ;\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 ;\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 ","To":"libcamera-devel@lists.libcamera.org","Cc":"Stefan Klug ","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":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"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 \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"]}