31–40 of 92 posts
Surely this introduces some curvature to the diagonals? I can't see how the perpendicular lines can be in correct perspective with the diagonals being parallel unless something is curving. I guess because it's preserving the perpendicular lines and the curvature is subtle, it's not very noticeable in typical architectural pictures.
In the image with the caption: "Normal homography perspective transformation produced in GIMP. Note how squashed the buildings at the right and left are when taken in isolation" The building at the right is not squashed ? It is wider than in the Piranesi picture above.
It would have been nice to show a few more easy-to-understand comparisons. The "street view" image was nice, but blurry. Ditto with the map. I think if the last image of the two buildings had been shown side-by-side with the "correct" perspective, that might have helped explain the article.
> By legibility I mean that the Piranesi distortion is easier to read, and that to anyone unfamiliar with photographs, that hasn’t grown up with TV, photographs and magazines, the Piranesi version would look much better, and the true perspective would look rather odd. I think this is a key point that people are often unaware of. For instance, whenever I see a modern artist who has painted photorealistic art, I read d…
> The distinctive feature of Piranesi’s perspective trick is that when you have a series of similar objects receding into the distance, such as houses or arches in a bridge, the nearer versions are just drawn as larger versions of those in the distance
This makes so much sense. When nature presents me with a series of identical arches, that is how I'm going to interpret them. Not as the geometric shapes that are actually projected onto the backs of my eyes.
> it isn’t possible to construct a camera or a computer program to render a view that does this Hmmm > The mathematics of this is quite simple If so then surely a program could be written
https://github.com/brunopostle/piranesi
The problem is that it is a method for projecting a rectangle, not a full 3D scene. I can imagine though that it could be extended to a full projection if you specify a central axis along which the perspective trick happens.
Examples
Panini: https://wiki.panotools.org/File:Ben_Equirectangular_panini.j...
Equirectangular: https://wiki.panotools.org/File:Big_ben_equirectangular.jpg
Full list: https://wiki.panotools.org/Projections
I'll take this opportunity to drop the fact that I'm kind of obsessed with the book "Piranesi", where the main character (named after the artist in the article) survives in a world which is just endless corridors of classical architecture, statues, and staircases. It's an incredibly calming experience, I've listened to the audiobook over 10 times before sleep. Highly recommended.
I'll take this opportunity to drop the fact that I'm kind of obsessed with the book "Piranesi", where the main character (named after the artist in the article) survives in a world which is just endless corridors of classical architecture, statues, and staircases. It's an incredibly calming experience, I've listened to the audiobook over 10 times before sleep. Highly recommended.
A very different book, but I loved reading "Jonathan Strange & Mr Norrell" [0] as well by the same author. [0] which used footnotes to great effect
I'll take this opportunity to drop the fact that I'm kind of obsessed with the book "Piranesi", where the main character (named after the artist in the article) survives in a world which is just endless corridors of classical architecture, statues, and staircases. It's an incredibly calming experience, I've listened to the audiobook over 10 times before sleep. Highly recommended.
Earlier quoted context omitted.
A very different book, but I loved reading "Jonathan Strange & Mr Norrell" [0] as well by the same author. [0] which used footnotes to great effect
This also has a great audiobook version. Simon Prebble really brings the characters to life.
I'll take this opportunity to drop the fact that I'm kind of obsessed with the book "Piranesi", where the main character (named after the artist in the article) survives in a world which is just endless corridors of classical architecture, statues, and staircases. It's an incredibly calming experience, I've listened to the audiobook over 10 times before sleep. Highly recommended.
