Dear Fer, David,
Your example could be named a cylindrical dial or polar cylindrical dial
if you refer to its shape and position.
Or point-sundial because the dial uses a point of shadow or light to
read the dial. I don't know how this sounds in English, it is a direct
translation of a word
Frans,
You can answer your own question.
Photograph a drawing of a vertical sundial and compare the drawing with the
corrected photo.
Kind regards.
Willy
Frans W. MAES wrote:
Hi All,
John Carmichael wrote:
But I discovered that by using digital editing, you can stretch or
compress
John Carmichael wrote :snip
But I discovered that by using digital editing, you can stretch or compress
a photo so that it appears that camera was directly over the dial! I
discovered this while using the perspective and distort features of
Adobe Photo Delux.
snip
Yes, it works quite well to
Frans:
I too was concerned about getting the proportions of the stretched photo as
close as possible to actual size of the sundial. This can be done in two
ways.
If a sundial is circular or has a circle drawn somewhere on it (my dial has
a circle in the dial's center), the circle appears as an
Hello fellow sundial lovers--
The September issue of the Bulletin of the British Sundial Society
contains (pages 127-9) an article by Herbert Wright detailing how he
designed and constructed, while interred in a Japanese prison camp in
Lunghua, China, a marble sundial which uses unfolded
Willy, Frans, et.al.,
Willy suggested:
... Photograph a drawing of a vertical sundial
and compare the drawing with the corrected photo.
.
Might I suggest a test photo of a Cartesian grid
(or a checkers-, or chess-, board? The analysis
would then be simpler and more generalized.
Also,
[EMAIL PROTECTED] wrote:
51G 30M
often with the G and M above their respective figures.
Can someone tell me, please, what the G stands for? The only angular G I
know is the grad, or 1/100th of a right angle. This is clearly not what is
meant in these cases, as 51D(egrees)
Mac, I would love to see these scanned images (if my box can handle
them).
Charlie
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