Create gradient and compose with image in one command

[stefda@gmail.com]

I can't figure out if it is possible to create a new image with gradient and compose it with an existing image in one command. Please help.

Command to generate the gradient:

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convert -size 1200x747 gradient: gradient.jpg

Command to compose the gradient with an existing `input.jpg`:

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convert input.jpg gradient.png -compose linear_burn -composite output.jpg

Ideally, I'd like to get output.jpg in "one step", using the convert command, without having to generate and store the gradient.jpg image beforehand.

[stefda@gmail.com]

A few more searches and I finally understand the anatomy of the command line! What I'm after above can be achieved with this simple command:

Code: Select all

convert input.jpg -size 1200x747 gradient: -compose linear_burn -composite output.jpg

[fmw42]

why linear burn and not just -compose over?