From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Thu, 5 Jul 2018 21:46:05 +0000 (+0200)
Subject: Fix a sign error in the motion search. (The paper is not entirely clear on this,... 
X-Git-Tag: 1.8.0~76^2~243
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=d567402be6554018899290ede7608c07540ff18c;p=nageru

Fix a sign error in the motion search. (The paper is not entirely clear on this, but I am fairly certain it is right.)
---

diff --git a/motion_search.frag b/motion_search.frag
index d9d1f4e..a417834 100644
--- a/motion_search.frag
+++ b/motion_search.frag
@@ -133,7 +133,8 @@ void main()
 		// so we can just subtract away the mean difference here.
 		du -= grad_sum * (warped_sum - template_sum) * (1.0 / (patch_size * patch_size));
 
-		u += (H_inv * du) * inv_image_size;
+		// Do the actual update.
+		u -= (H_inv * du) * inv_image_size;
 	}
 
 	// Reject if we moved too far.