{"id":23348,"url":"https://patchwork.libcamera.org/api/patches/23348/?format=json","web_url":"https://patchwork.libcamera.org/patch/23348/","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":"<20250507153103.253107-1-david.plowman@raspberrypi.com>","date":"2025-05-07T15:31:03","name":"utils: raspberrypi: ctt: Fix integer division error calculating LSC cell size","commit_ref":"e0405b171e928651ed7be5d7ae47b426c07125ff","pull_url":null,"state":"accepted","archived":false,"hash":"b4a9b05f0116797bd48f44659464a3f14b1ea3c3","submitter":{"id":42,"url":"https://patchwork.libcamera.org/api/people/42/?format=json","name":"David Plowman","email":"david.plowman@raspberrypi.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/23348/mbox/","series":[{"id":5165,"url":"https://patchwork.libcamera.org/api/series/5165/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=5165","date":"2025-05-07T15:31:03","name":"utils: raspberrypi: ctt: Fix integer division error calculating LSC cell size","version":1,"mbox":"https://patchwork.libcamera.org/series/5165/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/23348/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/23348/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 03C6DC3226\n\tfor ;\n\tWed, 7 May 2025 15:31:09 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 2765F68B31;\n\tWed, 7 May 2025 17:31:09 +0200 (CEST)","from mail-wm1-x32b.google.com (mail-wm1-x32b.google.com\n\t[IPv6:2a00:1450:4864:20::32b])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 38E8368AD8\n\tfor ;\n\tWed, 7 May 2025 17:31:07 +0200 (CEST)","by mail-wm1-x32b.google.com with SMTP id\n\t5b1f17b1804b1-441ab63a415so71346955e9.3\n\tfor ;\n\tWed, 07 May 2025 08:31:07 -0700 (PDT)","from davidp-xps-13.pitowers.org\n\t([2a00:1098:3142:1f:625b:4a21:8e09:bbdd])\n\tby smtp.gmail.com with ESMTPSA id\n\t5b1f17b1804b1-442cd3b7dd5sm4324455e9.35.2025.05.07.08.31.05\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tWed, 07 May 2025 08:31:05 -0700 (PDT)"],"Authentication-Results":"lancelot.ideasonboard.com; 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\n\tWed, 07 May 2025 08:31:06 -0700 (PDT)","From":"David Plowman ","To":"libcamera-devel@lists.libcamera.org","Cc":"David Plowman ","Subject":"[PATCH] utils: raspberrypi: ctt: Fix integer division error\n\tcalculating LSC cell size","Date":"Wed, 7 May 2025 16:31:03 +0100","Message-Id":"<20250507153103.253107-1-david.plowman@raspberrypi.com>","X-Mailer":"git-send-email 2.34.1","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":"The cell sizes must be cast to integers as the parameters that\nwere passed in may be floats.\n\nBug: https://github.com/raspberrypi/libcamera/issues/260\nSigned-off-by: David Plowman \nFixes: 36ba0e551507 (\"utils: raspberrypi: ctt: Fix NaNs in lens shading tables\")\n---\n utils/raspberrypi/ctt/ctt_alsc.py | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)","diff":"diff --git a/utils/raspberrypi/ctt/ctt_alsc.py b/utils/raspberrypi/ctt/ctt_alsc.py\nindex f4fd09e3..5d8b2ced 100644\n--- a/utils/raspberrypi/ctt/ctt_alsc.py\n+++ b/utils/raspberrypi/ctt/ctt_alsc.py\n@@ -131,7 +131,7 @@ def alsc(Cam, Img, do_alsc_colour, plot=False, grid_size=(16, 12), max_gain=8.0)\n pixels.\n \"\"\"\n w, h = Img.w/2, Img.h/2\n- dx, dy = (w - 1) // (grid_w - 1), (h - 1) // (grid_h - 1)\n+ dx, dy = int((w - 1) // (grid_w - 1)), int((h - 1) // (grid_h - 1))\n \n \"\"\"\n average the green channels into one\n","prefixes":[]}