diff --git a/picture/ffmpeg_group.png b/picture/ffmpeg_group.png
index 107c896..22d38cf 100644
Binary files a/picture/ffmpeg_group.png and b/picture/ffmpeg_group.png differ
diff --git a/picture/filter_balance.png b/picture/filter_balance.png
deleted file mode 100644
index 9cb7bce..0000000
Binary files a/picture/filter_balance.png and /dev/null differ