Question about the operation sequence

[hanselda]

Does anyone know how to influence the sequence of the operations applied to a image? For example:

convert a.jpg -opt1 -opt2 -opt3 b.jpg

What is the sequence of the operations? It seems that in imagemagick there is some internal priority of the operations. For example:

convert a.jpg -crop 10x10+2+2 -rotate 90 b.jpg

Here the rotation is always applied before cropping. How can one influence the operation sequence in this case?

Thanks!

[fmw42]

You will get a different result if you do

convert a.jpg -rotate -crop 10x10+2+2 b.jpg

also keep in mind you need to add +repage when doing -crop to get rid of the virtual canvas

Not all options are order dependent, though.

[anthony]

What is your IM version number????

Im version 5 had a problem in that multiple options would be stored and executed in an internal priority.

IM version 6 was developed with the idea of doing all options IN THE ORDER GIVEN!

See http://imagemagick.org/Usage/basics/ for details.

[hanselda]

Well that is right. I made a mistake:

If I do

Code: Select all

convert a.jpg -crop 10x10+2+2 -rotate 90 b.jpg

, the crop is applied before rotation, i.e. the right sequence. But if I do

Code: Select all

convert -crop 10x10+2+2 -rotate 90 a.jpg b.jpg

, the crop is applied after rotation.

[Bonzo]

Anything after version 6 you are supposed to read in the image first so:
This is correct:

Code: Select all

convert a.jpg -crop 10x10+2+2 -rotate 90 b.jpg

This is incorrect

Code: Select all

convert -crop 10x10+2+2 -rotate 90 a.jpg b.jpg