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Re: Scale transformation of images

From: mituharu
Subject: Re: Scale transformation of images
Date: Sun, 16 Jun 2019 17:10:29 +0900
User-agent: SquirrelMail/1.4.22-5.el6

> 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:

                                     YAMAMOTO Mitsuharu

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