[{"id":33063,"web_url":"https://patchwork.libcamera.org/comment/33063/","msgid":"","date":"2025-01-13T22:56:11","subject":"Re: [PATCH v1 06/11] ipa: rkisp1: Move calculation of RGB means into\n\town function","submitter":{"id":17,"url":"https://patchwork.libcamera.org/api/people/17/","name":"Paul Elder","email":"paul.elder@ideasonboard.com"},"content":"On Thu, Jan 09, 2025 at 12:53:57PM +0100, Stefan Klug wrote:\n> Move the calculation of the RGB means into an own function for better\n> code clarity. This commit doesn't contain any functional changes.\n> \n> Signed-off-by: Stefan Klug \n\nReviewed-by: Paul Elder \n\n> ---\n> src/ipa/rkisp1/algorithms/awb.cpp | 90 +++++++++++++++++--------------\n> src/ipa/rkisp1/algorithms/awb.h | 3 ++\n> 2 files changed, 52 insertions(+), 41 deletions(-)\n> \n> diff --git a/src/ipa/rkisp1/algorithms/awb.cpp b/src/ipa/rkisp1/algorithms/awb.cpp\n> index cffaa06a22c1..f6449565834b 100644\n> --- a/src/ipa/rkisp1/algorithms/awb.cpp\n> +++ b/src/ipa/rkisp1/algorithms/awb.cpp\n> @@ -229,7 +229,7 @@ void Awb::process(IPAContext &context,\n> \tconst rkisp1_cif_isp_stat *params = &stats->params;\n> \tconst rkisp1_cif_isp_awb_stat *awb = ¶ms->awb;\n> \tIPAActiveState &activeState = context.activeState;\n> -\tRGB rgbMeans;\n> +\tRGB rgbMeans = calculateRgbMeans(frameContext, awb);\n> \n> \tmetadata.set(controls::AwbEnable, frameContext.awb.autoEnabled);\n> \tmetadata.set(controls::ColourGains, {\n> @@ -243,6 +243,53 @@ void Awb::process(IPAContext &context,\n> \t\treturn;\n> \t}\n> \n> +\t/*\n> +\t * If the means are too small we don't have enough information to\n> +\t * meaningfully calculate gains. Freeze the algorithm in that case.\n> +\t */\n> +\tif (rgbMeans.r() < kMeanMinThreshold && rgbMeans.g() < kMeanMinThreshold &&\n> +\t rgbMeans.b() < kMeanMinThreshold)\n> +\t\treturn;\n> +\n> +\tactiveState.awb.temperatureK = estimateCCT(rgbMeans);\n> +\n> +\t/* Metadata shall contain the up to date measurement */\n> +\tmetadata.set(controls::ColourTemperature, activeState.awb.temperatureK);\n> +\n> +\t/*\n> +\t * Estimate the red and blue gains to apply in a grey world. The green\n> +\t * gain is hardcoded to 1.0. Avoid divisions by zero by clamping the\n> +\t * divisor to a minimum value of 1.0.\n> +\t */\n> +\tRGB gains({ rgbMeans.g() / std::max(rgbMeans.r(), 1.0),\n> +\t\t\t 1.0,\n> +\t\t\t rgbMeans.g() / std::max(rgbMeans.b(), 1.0) });\n> +\n> +\t/*\n> +\t * Clamp the gain values to the hardware, which expresses gains as Q2.8\n> +\t * unsigned integer values. Set the minimum just above zero to avoid\n> +\t * divisions by zero when computing the raw means in subsequent\n> +\t * iterations.\n> +\t */\n> +\tgains = gains.max(1.0 / 256).min(1023.0 / 256);\n> +\n> +\t/* Filter the values to avoid oscillations. */\n> +\tdouble speed = 0.2;\n> +\tgains = gains * speed + activeState.awb.gains.automatic * (1 - speed);\n> +\n> +\tactiveState.awb.gains.automatic = gains;\n> +\n> +\tLOG(RkISP1Awb, Debug)\n> +\t\t<< std::showpoint\n> +\t\t<< \"Means \" << rgbMeans << \", gains \"\n> +\t\t<< activeState.awb.gains.automatic << \", temp \"\n> +\t\t<< activeState.awb.temperatureK << \"K\";\n> +}\n> +\n> +RGB Awb::calculateRgbMeans(const IPAFrameContext &frameContext, const rkisp1_cif_isp_awb_stat *awb) const\n> +{\n> +\tVector rgbMeans;\n> +\n> \tif (rgbMode_) {\n> \t\trgbMeans = {{\n> \t\t\tstatic_cast(awb->awb_mean[0].mean_y_or_g),\n> @@ -301,46 +348,7 @@ void Awb::process(IPAContext &context,\n> \t */\n> \trgbMeans /= frameContext.awb.gains;\n> \n> -\t/*\n> -\t * If the means are too small we don't have enough information to\n> -\t * meaningfully calculate gains. Freeze the algorithm in that case.\n> -\t */\n> -\tif (rgbMeans.r() < kMeanMinThreshold && rgbMeans.g() < kMeanMinThreshold &&\n> -\t rgbMeans.b() < kMeanMinThreshold)\n> -\t\treturn;\n> -\n> -\tactiveState.awb.temperatureK = estimateCCT(rgbMeans);\n> -\n> -\t/*\n> -\t * Estimate the red and blue gains to apply in a grey world. The green\n> -\t * gain is hardcoded to 1.0. Avoid divisions by zero by clamping the\n> -\t * divisor to a minimum value of 1.0.\n> -\t */\n> -\tRGB gains({\n> -\t\trgbMeans.g() / std::max(rgbMeans.r(), 1.0),\n> -\t\t1.0,\n> -\t\trgbMeans.g() / std::max(rgbMeans.b(), 1.0)\n> -\t});\n> -\n> -\t/*\n> -\t * Clamp the gain values to the hardware, which expresses gains as Q2.8\n> -\t * unsigned integer values. Set the minimum just above zero to avoid\n> -\t * divisions by zero when computing the raw means in subsequent\n> -\t * iterations.\n> -\t */\n> -\tgains = gains.max(1.0 / 256).min(1023.0 / 256);\n> -\n> -\t/* Filter the values to avoid oscillations. */\n> -\tdouble speed = 0.2;\n> -\tgains = gains * speed + activeState.awb.gains.automatic * (1 - speed);\n> -\n> -\tactiveState.awb.gains.automatic = gains;\n> -\n> -\tLOG(RkISP1Awb, Debug)\n> -\t\t<< std::showpoint\n> -\t\t<< \"Means \" << rgbMeans << \", gains \"\n> -\t\t<< activeState.awb.gains.automatic << \", temp \"\n> -\t\t<< activeState.awb.temperatureK << \"K\";\n> +\treturn rgbMeans;\n> }\n> \n> REGISTER_IPA_ALGORITHM(Awb, \"Awb\")\n> diff --git a/src/ipa/rkisp1/algorithms/awb.h b/src/ipa/rkisp1/algorithms/awb.h\n> index e424804861a6..2a64cb60d5f4 100644\n> --- a/src/ipa/rkisp1/algorithms/awb.h\n> +++ b/src/ipa/rkisp1/algorithms/awb.h\n> @@ -38,6 +38,9 @@ public:\n> \t\t ControlList &metadata) override;\n> \n> private:\n> +\tRGB calculateRgbMeans(const IPAFrameContext &frameContext,\n> +\t\t\t\t const rkisp1_cif_isp_awb_stat *awb) const;\n> +\n> \tstd::optional>> colourGainCurve_;\n> \tbool rgbMode_;\n> };\n> -- \n> 2.43.0\n>","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 71BEEBD1F1\n\tfor ;\n\tMon, 13 Jan 2025 22:56:49 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id C666F6851F;\n\tMon, 13 Jan 2025 23:56:48 +0100 (CET)","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 3457368503\n\tfor ;\n\tMon, 13 Jan 2025 23:56:47 +0100 (CET)","from pyrite.rasen.tech (unknown [173.16.167.215])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id C60B874A;\n\tMon, 13 Jan 2025 23:55:49 +0100 (CET)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"pPnudzNW\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1736808950;\n\tbh=8Uw8BAkX5vEEglQtj4duolAYV1IgDvzWyJLgxe8YGis=;\n\th=Date:From:To:Cc:Subject:References:In-Reply-To:From;\n\tb=pPnudzNWjqFSkNOJfG4SxNjaEu3laYehqqmxJym0VOth2UTk1pIAMe62Sq1VRiRze\n\tX11GfnjbvlIAIeCCJ5apReRrTRFqUg5Kwf3NmGFKtamp/1/2Vnhvg+xp4g70ucinFt\n\tPJeLyFtA2NqmCHgNB687TVEDVIELuSujrj82GRak=","Date":"Mon, 13 Jan 2025 16:56:11 -0600","From":"Paul Elder ","To":"Stefan Klug ","Cc":"libcamera-devel@lists.libcamera.org","Subject":"Re: [PATCH v1 06/11] ipa: rkisp1: Move calculation of RGB means into\n\town function","Message-ID":"","References":"<20250109115412.356768-1-stefan.klug@ideasonboard.com>\n\t<20250109115412.356768-7-stefan.klug@ideasonboard.com>","MIME-Version":"1.0","Content-Type":"text/plain; charset=us-ascii","Content-Disposition":"inline","In-Reply-To":"<20250109115412.356768-7-stefan.klug@ideasonboard.com>","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\" "}},{"id":33097,"web_url":"https://patchwork.libcamera.org/comment/33097/","msgid":"","date":"2025-01-20T10:27:31","subject":"Re: [PATCH v1 06/11] ipa: rkisp1: Move calculation of RGB means into\n\town function","submitter":{"id":156,"url":"https://patchwork.libcamera.org/api/people/156/","name":"Dan Scally","email":"dan.scally@ideasonboard.com"},"content":"Morning Stefan\n\nOn 09/01/2025 11:53, Stefan Klug wrote:\n> Move the calculation of the RGB means into an own function for better\n> code clarity. This commit doesn't contain any functional changes.\n>\n> Signed-off-by: Stefan Klug \n> ---\n\nReviewed-by: Daniel Scally \n> src/ipa/rkisp1/algorithms/awb.cpp | 90 +++++++++++++++++--------------\n> src/ipa/rkisp1/algorithms/awb.h | 3 ++\n> 2 files changed, 52 insertions(+), 41 deletions(-)\n>\n> diff --git a/src/ipa/rkisp1/algorithms/awb.cpp b/src/ipa/rkisp1/algorithms/awb.cpp\n> index cffaa06a22c1..f6449565834b 100644\n> --- a/src/ipa/rkisp1/algorithms/awb.cpp\n> +++ b/src/ipa/rkisp1/algorithms/awb.cpp\n> @@ -229,7 +229,7 @@ void Awb::process(IPAContext &context,\n> \tconst rkisp1_cif_isp_stat *params = &stats->params;\n> \tconst rkisp1_cif_isp_awb_stat *awb = ¶ms->awb;\n> \tIPAActiveState &activeState = context.activeState;\n> -\tRGB rgbMeans;\n> +\tRGB rgbMeans = calculateRgbMeans(frameContext, awb);\n> \n> \tmetadata.set(controls::AwbEnable, frameContext.awb.autoEnabled);\n> \tmetadata.set(controls::ColourGains, {\n> @@ -243,6 +243,53 @@ void Awb::process(IPAContext &context,\n> \t\treturn;\n> \t}\n> \n> +\t/*\n> +\t * If the means are too small we don't have enough information to\n> +\t * meaningfully calculate gains. Freeze the algorithm in that case.\n> +\t */\n> +\tif (rgbMeans.r() < kMeanMinThreshold && rgbMeans.g() < kMeanMinThreshold &&\n> +\t rgbMeans.b() < kMeanMinThreshold)\n> +\t\treturn;\n> +\n> +\tactiveState.awb.temperatureK = estimateCCT(rgbMeans);\n> +\n> +\t/* Metadata shall contain the up to date measurement */\n> +\tmetadata.set(controls::ColourTemperature, activeState.awb.temperatureK);\n> +\n> +\t/*\n> +\t * Estimate the red and blue gains to apply in a grey world. The green\n> +\t * gain is hardcoded to 1.0. Avoid divisions by zero by clamping the\n> +\t * divisor to a minimum value of 1.0.\n> +\t */\n> +\tRGB gains({ rgbMeans.g() / std::max(rgbMeans.r(), 1.0),\n> +\t\t\t 1.0,\n> +\t\t\t rgbMeans.g() / std::max(rgbMeans.b(), 1.0) });\n> +\n> +\t/*\n> +\t * Clamp the gain values to the hardware, which expresses gains as Q2.8\n> +\t * unsigned integer values. Set the minimum just above zero to avoid\n> +\t * divisions by zero when computing the raw means in subsequent\n> +\t * iterations.\n> +\t */\n> +\tgains = gains.max(1.0 / 256).min(1023.0 / 256);\n> +\n> +\t/* Filter the values to avoid oscillations. */\n> +\tdouble speed = 0.2;\n> +\tgains = gains * speed + activeState.awb.gains.automatic * (1 - speed);\n> +\n> +\tactiveState.awb.gains.automatic = gains;\n> +\n> +\tLOG(RkISP1Awb, Debug)\n> +\t\t<< std::showpoint\n> +\t\t<< \"Means \" << rgbMeans << \", gains \"\n> +\t\t<< activeState.awb.gains.automatic << \", temp \"\n> +\t\t<< activeState.awb.temperatureK << \"K\";\n> +}\n> +\n> +RGB Awb::calculateRgbMeans(const IPAFrameContext &frameContext, const rkisp1_cif_isp_awb_stat *awb) const\n> +{\n> +\tVector rgbMeans;\n> +\n> \tif (rgbMode_) {\n> \t\trgbMeans = {{\n> \t\t\tstatic_cast(awb->awb_mean[0].mean_y_or_g),\n> @@ -301,46 +348,7 @@ void Awb::process(IPAContext &context,\n> \t */\n> \trgbMeans /= frameContext.awb.gains;\n> \n> -\t/*\n> -\t * If the means are too small we don't have enough information to\n> -\t * meaningfully calculate gains. Freeze the algorithm in that case.\n> -\t */\n> -\tif (rgbMeans.r() < kMeanMinThreshold && rgbMeans.g() < kMeanMinThreshold &&\n> -\t rgbMeans.b() < kMeanMinThreshold)\n> -\t\treturn;\n> -\n> -\tactiveState.awb.temperatureK = estimateCCT(rgbMeans);\n> -\n> -\t/*\n> -\t * Estimate the red and blue gains to apply in a grey world. The green\n> -\t * gain is hardcoded to 1.0. Avoid divisions by zero by clamping the\n> -\t * divisor to a minimum value of 1.0.\n> -\t */\n> -\tRGB gains({\n> -\t\trgbMeans.g() / std::max(rgbMeans.r(), 1.0),\n> -\t\t1.0,\n> -\t\trgbMeans.g() / std::max(rgbMeans.b(), 1.0)\n> -\t});\n> -\n> -\t/*\n> -\t * Clamp the gain values to the hardware, which expresses gains as Q2.8\n> -\t * unsigned integer values. Set the minimum just above zero to avoid\n> -\t * divisions by zero when computing the raw means in subsequent\n> -\t * iterations.\n> -\t */\n> -\tgains = gains.max(1.0 / 256).min(1023.0 / 256);\n> -\n> -\t/* Filter the values to avoid oscillations. */\n> -\tdouble speed = 0.2;\n> -\tgains = gains * speed + activeState.awb.gains.automatic * (1 - speed);\n> -\n> -\tactiveState.awb.gains.automatic = gains;\n> -\n> -\tLOG(RkISP1Awb, Debug)\n> -\t\t<< std::showpoint\n> -\t\t<< \"Means \" << rgbMeans << \", gains \"\n> -\t\t<< activeState.awb.gains.automatic << \", temp \"\n> -\t\t<< activeState.awb.temperatureK << \"K\";\n> +\treturn rgbMeans;\n> }\n> \n> REGISTER_IPA_ALGORITHM(Awb, \"Awb\")\n> diff --git a/src/ipa/rkisp1/algorithms/awb.h b/src/ipa/rkisp1/algorithms/awb.h\n> index e424804861a6..2a64cb60d5f4 100644\n> --- a/src/ipa/rkisp1/algorithms/awb.h\n> +++ b/src/ipa/rkisp1/algorithms/awb.h\n> @@ -38,6 +38,9 @@ public:\n> \t\t ControlList &metadata) override;\n> \n> private:\n> +\tRGB calculateRgbMeans(const IPAFrameContext &frameContext,\n> +\t\t\t\t const rkisp1_cif_isp_awb_stat *awb) const;\n> +\n> \tstd::optional>> colourGainCurve_;\n> \tbool rgbMode_;\n> };","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 22155C327D\n\tfor ;\n\tMon, 20 Jan 2025 10:27:38 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 0F5AA6854D;\n\tMon, 20 Jan 2025 11:27:37 +0100 (CET)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id C367A68503\n\tfor ;\n\tMon, 20 Jan 2025 11:27:34 +0100 (CET)","from [192.168.0.43]\n\t(cpc141996-chfd3-2-0-cust928.12-3.cable.virginm.net [86.13.91.161])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 53906735\n\tfor ;\n\tMon, 20 Jan 2025 11:26:33 +0100 (CET)"],"Authentication-Results":"lancelot.ideasonboard.com; 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