How to get image DPI?

dyb · 4 Jul 2018, 16:49

I'm using ImageObject to load an image to drawBot, process it through some filters and then save it as a new image. Simple batch processing.

Everything goes well when the images i input are 72dpi.
If the input image is set to more than 72dpi then saved images is smaller (in absolute px value).

I noticed there's an option to specify imageResolution for the saveImage() function so i'm assuming that i would need to match the dpi of the input and output image to keep the right size.

But how can i get the input image dpi?

frederik · 6 Jul 2018, 08:32

good question

in drawBot there is not a api for this.

I could consider imageResoltion(path) returning the dpi

opening an issue: https://github.com/typemytype/drawbot/issues/215