Convert vertical to horizontal

[phamkhactu]

Hi,

As your document you gave
I have image like that. Now I want to convert it to correct horizontal. how can I do it.

I very happy if you can give me some code example.
Thank you very much!
Here is input:

Here is my expected output:

[pmoulon]

If you have a 360 camera model, for each ray apply a rotation, then reproject in the image domain.

[phamkhactu]

If you have a 360 camera model, for each ray apply a rotation, then reproject in the image domain.

I use slides of images, I use stitch to make 360x180. I will find more infomation.

Do you have any suggestion?