From d0a01a75e703b49e996686ab7818c002e436d531 Mon Sep 17 00:00:00 2001
From: Alexander Bocken <alexander@bocken.org>
Date: Tue, 17 Feb 2026 18:25:20 +0100
Subject: [PATCH] recipes: sharpen Gaussian kernel for dominant color
 extraction

Reduce sigma from 0.3 to 0.15 * dimension so edge pixels contribute
under 1% weight, heavily biasing the color toward the image center.
---
 src/utils/imageProcessing.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/utils/imageProcessing.ts b/src/utils/imageProcessing.ts
index b8e7300..3951461 100644
--- a/src/utils/imageProcessing.ts
+++ b/src/utils/imageProcessing.ts
@@ -56,8 +56,8 @@ export async function extractDominantColor(input: Buffer | string): Promise<stri
 	const { width, height } = info;
 	const cx = (width - 1) / 2;
 	const cy = (height - 1) / 2;
-	const sigmaX = 0.3 * width;
-	const sigmaY = 0.3 * height;
+	const sigmaX = 0.15 * width;
+	const sigmaY = 0.15 * height;
 
 	let wL = 0, wa = 0, wb = 0, wSum = 0;