diff --git a/klausur-service/backend/cv_vocab_pipeline.py b/klausur-service/backend/cv_vocab_pipeline.py
index c612fb5..bead1af 100644
--- a/klausur-service/backend/cv_vocab_pipeline.py
+++ b/klausur-service/backend/cv_vocab_pipeline.py
@@ -4769,6 +4769,8 @@ def _ocr_cell_crop(
                 bgr_crop, min_dim=150, max_scale=3,
             )
             up_h, up_w = upscaled_bin.shape[:2]
+            logger.info("_ocr_cell_crop R%02d_C%d: rapid upscale %dx%d -> %dx%d",
+                        row_idx, col_idx, cw, ch, up_w, up_h)
             scale_x = up_w / max(cw, 1)
             scale_y = up_h / max(ch, 1)
             was_scaled = (up_w != cw or up_h != ch)