From: mituharu@math.s.chiba-u.ac.jp
To: "Eli Zaretskii" <eliz@gnu.org>
Cc: mituharu@math.s.chiba-u.ac.jp, emacs-devel@gnu.org
Subject: Re: Scale transformation of images
Date: Sun, 16 Jun 2019 17:10:29 +0900 [thread overview]
Message-ID: <6f63a580ef9153558515b211a7ccf566.squirrel@weber.math.s.chiba-u.ac.jp> (raw)
In-Reply-To: <0D0F17C4-E0E1-46B0-A838-12DB00C9984C@gnu.org>
> Thanks. So you are saying that in the equations presented by Richard in
> https://lists.gnu.org/archive/html/emacs-devel/2019-06/msg00361.html the
> matrix Fij is the inverse of the matrix computed in image_set_transform,
> is that right?
The equations themselves are correct, but the source and destination
spaces are implicit.
I would say the directions of the conversions you and Richard are thinking
about are inverse each other.
See also item 2 in my previous post:
https://lists.gnu.org/archive/html/emacs-devel/2019-06/msg00405.html
YAMAMOTO Mitsuharu
mituharu@math.s.chiba-u.ac.jp
prev parent reply other threads:[~2019-06-16 8:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-16 6:16 Scale transformation of images Eli Zaretskii
2019-06-16 6:45 ` mituharu
2019-06-16 7:54 ` Eli Zaretskii
2019-06-16 8:10 ` mituharu [this message]
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