Large diffs from font rendering

Hello, thanks for the module.

I know that you are aware of the issues but I'm trying to understand what I can do about them. In particular I see a large difference between two images that are similar, with some apparent minor difference in the font causing the failure.

I've inspected the generated images and they are the same (physical) size, dpi, etc.

I see some discussion (e.g. https://github.com/astropy/astropy/pull/7150) about maybe just choosing the font appropriately to minimize this. Is that the current recommended solution?

I also gave the perceptual hash (#21) a go and it does generate identical hashes for the two images, which is nice. However I haven't yet had time to look into that more to really understand what it is doing so don't necessarily want to rely on it.

Baseline:

Generated. This is missing the title as remove_text=True is enabled (#68 would be relevant here):

Diff:

This is coming from https://github.com/panoptes/POCS/pull/735

(Note that even getting these images out of travis was a huge pain as travis doesn't allow artifacts to be uploaded on pull-requests...but that's a different issue).

Bắt đầu bằng cách tái hiện phép so sánh hình ảnh từ POCS pull request 735 và xem lại cuộc thảo luận được tham chiếu trong astropy pull request 7150. So sánh những khác biệt trong việc render font với phương pháp perceptual hash từ issue 21; issue được giải quyết khi có một khuyến nghị cụ thể, được ghi chép đầy đủ hoặc một fix được xác định rõ.