straighten and width-to-height ratio

[wi so]

hallo,

is there a better siplier way to cut and straighten flat-panorama directly in  ptgui?

in the moment its more trial and error. i push it in ptgui with the hand-tool so that is the nearest to original. then i make the rest in affinity photo. with the right aspect ratio of the "canvas" and the perspective tool.

if i know the aspect ratio of the painting, and i have a right angle on the picture is there a way to make this easier/better in ptgui direct?

thx for hints and tips,

wiso

[PTGui Support]

Hi Wiso,

You could place 'horizontal line' control points and 'vertical line'
control points. This tells PTGui that those points should form a
horizontal or vertical line in the panorama.

After adding the points, run the optimizer or do 'Level Panorama' in the
Panorama Editor -> Edit menu.

The video tutorial, part 8 shows how it's done:
https://ptgui.com/videotutorials.html

Note that, as the video explains, for equirectangular (spherical)
panoramas, you would only use 'vertical line' control points. For
rectilinear panoramas you can use both vertical and horizontal line
control points. This is because rectilinear projection preserves all
straight lines, not just the vertical ones.

Kind regards,

Joost Nieuwenhuijse
www.ptgui.com

On 16/06/2022 17:58, wi so wrote:
> hallo,
> is there a better siplier way to cut and straighten flat-panorama
> directly in  ptgui?
>

> K1600_Skizze (219).JPG
>
> in the moment its more trial and error. i push it in ptgui with the
> hand-tool so that is the nearest to original. then i make the rest in
> affinity photo. with the right aspect ratio of the "canvas" and the
> perspective tool.
>
> if i know the aspect ratio of the painting, and i have a right angle on
> the picture is there a way to make this easier/better in ptgui direct?
>
> thx for hints and tips,
> wiso
>

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[wi so]

thank you, i will try it!

best regards,

wiso

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[wi so]

thank you,

am i right: i can not make the  'horizontal line' control points from the whole picture/length (or is there a possibility?), else only from parts (pic 30/30 and/or 10/10).

that works, but i get this cutout and i am not able to make it smaller - means to get the whole picture.

what to do?

thx,

wiso

Am Fr., 17. Juni 2022 um 08:55 Uhr schrieb 'PTGui Support' via PTGui Support <pt...@googlegroups.com>:

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[Erik Krause]

Am 17.06.22 um 11:15 schrieb wi so:

> that works, but i get this cutout and i am not able to make it smaller -
> means to get the whole picture.
> what to do?

That's supposed to happen, since the images where taken from slightly
sideways. Just increase the visible area in Panorama Editor using the
sliders left and bottom, then drag in yellow crop lines from the edges
of the visible area. Also see https://ptgui.com/support.html#6_6

--
Erik Krause

[wi so]

thank you, works!

is the aspect ratio automatically ok? it looks good, but i am not shure.

or has the aspect ratio nothing to do with the straighten?

thx,

regards,

wiso

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[Erik Krause]

Am 17.06.22 um 12:32 schrieb wi so:

> is the aspect ratio automatically ok? it looks good, but i am not shure.
> or has the aspect ratio nothing to do with the straighten?

You mean whether the result image is stretched in any way? It should
not, since PTGui works geometrically correct. The only deviation from
the original image would be due to stitching errors.

--
Erik Krause

[Brice Genevois]

Hy guys sorry but i receive all your post on my email and i did not follow this topics, do you know how to unsuscribe ? (i tried with the email at the end of the mail but unfortunatly it's came back undelivered) thanks

[PTGui Support]

Hi Brice,

I think you should be able to unsubscribe here:
https://groups.google.com/g/ptgui/membership

At 'Subscription' select 'No email'.

You'll still be able to access the forum on the web:
https://groups.google.com/g/ptgui/

Kind regards,

Joost Nieuwenhuijse
www.ptgui.com

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