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Convert image and mask to PNG
Posted: 2014-12-17T15:09:21-07:00
by oceanthrsty
I have an image
And it's mask
Here's the command I'm using right now:
Code: Select all
convert main.jpg \( mask.jpg -colorspace gray -alpha off \) \ -compose copy-opacity -composite new.png
It produces a great PNG... but it's in grayscale
How can I get it in color.... and is there anyway to make it process faster?
Thanks!
Re: Convert image and mask to PNG
Posted: 2014-12-17T15:23:53-07:00
by snibgo
It works fine for me, IM v6.9.0-9, red letters on a transparent background.
What version IM are you using? Perhaps an old one, and you need to upgrade.
You don't need "-colorspace gray -alpha off".
Using miff instead of jpg for input may be faster. Png is slow to write; one of the compression options may make it faster.
Re: Convert image and mask to PNG
Posted: 2014-12-17T19:54:40-07:00
by oceanthrsty
What's the exact syntax you're using?
I upgraded my version I'm running the same syntax as above and I'm getting an error message
Code: Select all
convert main.jpg \( mask.jpg -colorspace gray -alpha off \) \ -compose copy-opacity -composite new.png
convert: unable to open image ` -compose': No such file or directory @ error/blob.c/OpenBlob/2709.
convert: no decode delegate for this image format `' @ error/constitute.c/ReadImage/501.
convert: unable to open image `copy-opacity': No such file or directory @ error/blob.c/OpenBlob/2709.
convert: no decode delegate for this image format `' @ error/constitute.c/ReadImage/501.
I get a new.png exported. But it looks exactly like the mask.jpg
Thanks
Re: Convert image and mask to PNG
Posted: 2014-12-17T20:27:34-07:00
by snibgo
oceanthrsty wrote:I upgraded my version
What version are you now using? "convert -version"
My commands (Windows BAT syntax):
Code: Select all
%IM%convert ^
-verbose ^
main.jpg ^
( mask.jpg -colorspace gray -alpha off ) ^
-compose copy-opacity -composite ^
new.png
%IM%convert ^
-verbose ^
main.jpg ^
mask.jpg ^
-compose copy-opacity -composite ^
new2.png
%IM%convert main.jpg main.miff
%IM%convert mask.jpg mask.miff
%IM%convert ^
-verbose ^
main.miff ^
mask.miff ^
-compose copy-opacity -composite ^
new3.png
All three results have red letters on transparent background.
Re: Convert image and mask to PNG
Posted: 2014-12-17T21:02:23-07:00
by fmw42
try breaking the line at the \ or remove it. You cannot have a space after a new line \. Also add -alpha off before -compose
Code: Select all
convert main.jpg mask.jpg \
-alpha off -compose copy-opacity -composite new.png
or
Code: Select all
convert main.jpg mask.jpg -alpha off -compose copy-opacity -composite new.png
If on Windows, the new line character is ^ rather than \. Also Windows does not need to escape the parenthesis and escape is ^. I assume above that you are not on Windows.
Re: Convert image and mask to PNG
Posted: 2014-12-17T21:30:35-07:00
by snibgo
Well spotted, Fred. The OP's command seems to be a single line with a spurious backslash, like this (bash syntax):
Code: Select all
$ convert xc: xc: \ -composite x.png
convert: unable to open image ` -composite': No such file or directory @ error/blob.c/OpenBlob/2709.
Re: Convert image and mask to PNG
Posted: 2014-12-18T08:44:26-07:00
by oceanthrsty
Fred,
Thank you. That works!