add brightness and contrast options

This commit is contained in:
Milan Nikolic
2015-11-05 06:11:40 +01:00
parent 574e364954
commit 4d1e0a44d2
2 changed files with 35 additions and 21 deletions

View File

@@ -66,6 +66,8 @@ Using
--grayscale Convert images to grayscale (monochromatic)
--rotate=0 Rotate images, valid values are 0, 90, 180, 270
--flip="none" Flip images, valid values are none, horizontal, vertical
--brightness=0 Changes the brightness of the images, must be in range (-100, 100)
--contrast=0 Changes the contrast of the images, must be in range (-100, 100)
--suffix=SUFFIX Add suffix to file basename
cover [<flags>] <args>...