We can use "convert" or "mogrify" to make this transition from color to
grayscale.
Use "convert" to make a color image to a grayscale one:
$ convert -type Grayscale input.png output.png
This will keep your original picture “input.png” in color, and create a new
one in grayscale “output.png”
Use "mogrify" to convert an image to grayscale:
$ mogrify -type Grayscale input.png
This will change your original picture “input.png”
When we need to convert bulk pictures to grayscale, no need to run a bash
for loop, or a script.
simply copy all files to a new folder, and then run the "mogrify" command
there. Like this:
$ cp /home/user/my_pics/* /home/user/my_pics_grayscale/
Then run "mogrify" on the second folder.
$ mogrify -type Grayscale /home/user/my_pics_grayscale/*
--
Regards,
Tha.Suresh
My experiences with Linux are here,
http://thasulinux.wordpress.com
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