Crop empty image spaces

[sinamcr7]

is there an option to crop image before saving so the empty spaces with no useful info are removed to reduce file size?
as I'm creating big array at start I need to crop image so empty spaces are removed to save space?

[jcupitt]

Hello @sinamcr7,

Yes, have a look at find_trim:

https://www.libvips.org/API/current/libvips-arithmetic.html#vips-find-trim

$ python
Python 3.12.3 (main, Jul 31 2024, 17:43:48) [GCC 13.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import pyvips
>>> x = pyvips.Image.new_from_file("lion.png")
>>> x.width
425
>>> x.height
425
>>> x.find_trim()
[34, 41, 250, 381]
>>> 

[sinamcr7]

awesome thanks