From 29746ab9635953fe8784d24bc2487aad5a9a91fd Mon Sep 17 00:00:00 2001
From: Haodi Yao <20B904013@stu.hit.edu.cn>
Date: Thu, 27 Nov 2025 16:34:26 +0800
Subject: [PATCH] fix(features2d): Correct pointer arithmetic in BRISK corner
 traversal

The pointer offset to move from top-right to bottom-right was incorrect. This change corrects the pointer calculation to use the proper row stride, ensuring it lands on the correct pixel.
---
 modules/features2d/src/brisk.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/features2d/src/brisk.cpp b/modules/features2d/src/brisk.cpp
index 59a86470f6..a324f44718 100644
--- a/modules/features2d/src/brisk.cpp
+++ b/modules/features2d/src/brisk.cpp
@@ -626,7 +626,7 @@ BRISK_Impl::smoothedIntensity(const cv::Mat& image, const cv::Mat& integral, con
     ret_val = A * int(*ptr);
     ptr += dx + 1;
     ret_val += B * int(*ptr);
-    ptr += dy * imagecols + 1;
+    ptr += (dy + 1) * imagecols;
     ret_val += C * int(*ptr);
     ptr -= dx + 1;
     ret_val += D * int(*ptr);