From ff3fd5cc53704ef1c219f4a5c97d8e69536bf2ac Mon Sep 17 00:00:00 2001
From: Hsieh Chin Fan <pham@topo.tw>
Date: Fri, 21 Jul 2023 23:14:48 +0800
Subject: Update

---
 bin/image/shellrc | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/bin/image/shellrc b/bin/image/shellrc
index 81e029b..a62dd70 100644
--- a/bin/image/shellrc
+++ b/bin/image/shellrc
@@ -2,13 +2,13 @@
 
 # Concatenate image vertically
 image.vertical() {
-  if [ ! $# = 0 ]; then
+  if [ $# = 0 ]; then
     echo 'Usage: image.vertical input1.jpg input2.jpg'
     return 0
   fi
 
   ext=${1##*.}
-  convert "$@" -append $(basename -s .$ext $1)-$(basename -s .$ext ${@: -1}).${format:-$ext}
+  convert "$@" +append $(basename -s .$ext $1)-$(basename -s .$ext ${@: -1}).${format:-$ext}
 }
 
 # Concatenate image horizontally
@@ -19,7 +19,7 @@ image.horizontal() {
   fi
 
   ext=${1##*.}
-  convert "$@" +append output.$ext
+  convert "$@" -append output.$ext
 }
 
 # Export image with data url format
-- 
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