From 65a6750ceceb812f856d8a083cea7f37f5fd8379 Mon Sep 17 00:00:00 2001
From: Minh Duc Nguyen <37109868+mducducd@users.noreply.github.com>
Date: Thu, 26 Mar 2026 11:04:04 +0100
Subject: [PATCH] Simplify patch size calculation in encoder

Replaced the calculation of patch_size_lvl0 with a direct assignment from coords.tile_size_px. (#166)
---
 src/stamp/encoding/encoder/titan.py | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/src/stamp/encoding/encoder/titan.py b/src/stamp/encoding/encoder/titan.py
index 920b3db8..bbd16804 100644
--- a/src/stamp/encoding/encoder/titan.py
+++ b/src/stamp/encoding/encoder/titan.py
@@ -48,16 +48,7 @@ def _generate_slide_embedding(
 
         coords_tensor = torch.tensor(coords.coords_um, dtype=self.precision)
 
-        # Convert coordinates from microns to pixels
-        xs = torch.unique(coords_tensor[:, 0])
-        ys = torch.unique(coords_tensor[:, 1])
-        patch_size_lvl0 = int(
-            min(
-                (xs[1:] - xs[:-1])[(xs[1:] - xs[:-1]) > 0].min(),
-                (ys[1:] - ys[:-1])[(ys[1:] - ys[:-1]) > 0].min(),
-            )
-        )
-
+        patch_size_lvl0 = int(coords.tile_size_px)
         coords_px = coords_tensor / coords.mpp  # Convert to pixels
         coords_px = coords_px.to(torch.int64).to(device)  # Convert to integer