How can I extract a 'flat' image from a spherical panorama?

qtluong · January 2, 2021 at 9:31 AM

I would like to convert a panorama (360 x 180 degree equirectangular image) to a rectilinear projection with specific angles and field of view. So far, I am using the droplets to create a viewer and then after adjusting angles and field of view within the viewer, I did a screen capture, but this creates an image whose resolution is limited to the screen resolution. How do I use krpano tools to generate directly the high resolution rectilinear projection?

klaus.krpano · January 4, 2021 at 10:54 AM

Hi,

the 'screen-shots' are not limited to the screen-resolution.

They can be as big as the supported WebGL rendering size by the devices (on mobile devices typically 4096x4096, on desktop systems typically 16384x16384, although the memory-need can get problematic with such large sizes).

See here the makeScreenshot API:
https://krpano.com/docu/pluginint….makeScreenshot

and here in this example the 'makescreenshot_hires' <action>:
https://krpano.com/examples/#makescreenshot-api

For offline krpanotools processing there is the VIEW mode of the spheretocube tool to generate a custom rectilinear view out of a spherical image:
https://krpano.com/docu/tools/#spheretocube

E.g.

Code

krpanotools spheretocube VIEW pano.jpg view.jpg -hlookat=12,3,0 -fov=110 -outsize=4000x300

Best regards,
Klaus

pixar · September 1, 2025 at 1:30 PM

Perhaps more experienced users can do this in krpano (judging by Klaus's answer).

There are two convenient options:

1. Pano2VR
2. PanoFlatten plugin for Photoshop

allows you to extract ‘flattened’ rectilinear projections at any angle and with the desired field of view.

indexofrefraction · February 12, 2026 at 11:04 AM

direct recalculation of images can be done using PTGui

screenshotting in krpano works, if the images aren't too large

if you don't want to code you can have a look at zsnapshot and go from one of the examples there.

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