Hi Ken!
Glad there is only one question now - or none at all.
With a "regular' panorama it makes sense to choose an adequate center
for the image, say, pointing North or to some interesting feature in the
image. However, panning the panorama in a viewer (standalone or through an
internet page) you could see anywhere you want.
For your rectangular image, a mosaic of microscope photos, how will you
see or present it to others? Using an image editor like Gimp, or maybe
OpenSeadragon to show (efficiently) a very high resolution image in an
internet page? In both cases the image will be presented centered in the
window, scaled for best fit. The center will ever be the center of the
image (or viewing window), and you could pan and zoom without difficulty.
There is no need to define a center for your image!
Hope this makes sense,
Luís Henrique
Em seg., 17 de nov. de 2025 às 15:36, Ken Shirriff <[email protected]>
escreveu:
> Thanks! One (hopefully) final question: how do I center a mosaic image? If
> I try to center it in Panorama Preview, the pitch and yaw get set, causing
> the image to be tilted rather than shifted. What I want is the translation
> parameters to get changed to move the center of the image.
> Ken
>
> On Sunday, November 16, 2025 at 11:02:11 AM UTC-8 [email protected]
> wrote:
>
>> The translation parameters are linear distances. Imagine that the photos
>> are each being projected onto a wall by portable slide projectors, and you
>> are viewing this wall from a distance of one unit. The coordinates for each
>> projector are trx try trz (you are at 0,0,0) - Bruno
>>
>>
>> On Sun, 16 Nov 2025, 18:32 Ken Shirriff wrote:
>>
>>> It looks like TrX and TrY are in radians?
>>>
>>> On Sunday, November 16, 2025 at 10:07:05 AM UTC-8 Ken Shirriff wrote:
>>>
>>>> Awesome, mosaic mode (TrX, TrY) with rectilinear lenses and projection
>>>> does what I want. One question: what are the units for TrX and TrY? By
>>>> experimentation, 1º is approximately 0.0175 for TrX/TrY. But I assume
>>>> there's some geometrical interpretation.
>>>
>>> Bruno
>>
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Luis Henrique Camargo Quiroz
http://panoramaslh.net/ - http://luishcq.br.tripod.com
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