Hello , I want to convert equirectangular image to rectilinear HTML canvas core api.( Using per pixel manipulation, not webgl shaders )
I downloaded an equirectangular image like the following:
Then I want to convert it as per following:
I came up with a thread Rectilinear projection of Equirectangular image
Ref : Gnomonic Projection
PDF : result.pdf (288.9 KB)
How can I implement this using canvas api (per pixel manipulation) ?
NOTE: I already converted cubemap to equirectangular image and vice versa.
But I want rectilinear image from this. Pls help.