From e60d34af8b0ec8f6e6439a0f3fb687042e9dde82 Mon Sep 17 00:00:00 2001
From: Cao Yuhang <yhcao6@gmail.com>
Date: Tue, 21 Jan 2020 16:30:05 +0800
Subject: [PATCH] Fix albu mask format bug (#1818)

---
 mmdet/datasets/pipelines/transforms.py | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/mmdet/datasets/pipelines/transforms.py b/mmdet/datasets/pipelines/transforms.py
index 702bdea..a9516d5 100644
--- a/mmdet/datasets/pipelines/transforms.py
+++ b/mmdet/datasets/pipelines/transforms.py
@@ -833,9 +833,8 @@ class Albu(object):
                     results[label] = np.array(
                         [results[label][i] for i in results['idx_mapper']])
                 if 'masks' in results:
-                    results['masks'] = [
-                        results['masks'][i] for i in results['idx_mapper']
-                    ]
+                    results['masks'] = np.array(
+                        [results['masks'][i] for i in results['idx_mapper']])
 
                 if (not len(results['idx_mapper'])
                         and self.skip_img_without_anno):
-- 
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