Projection adjustment suggestions for 2018

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Abrimaal

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Dec 24, 2017, 5:23:38 PM12/24/17
to hugin and other free panoramic software
I came here back to share some ideas. I am not sure how it looks from the programmer's point of view. Easy or difficult to introduce?

1. More sliders. Cylindrical, Mercator and Equirectangular projections can be merged into one. They differ only by the vertical compression. A slider to adjust the vertical compression would be useful, because sometimes Cylindrical is too tall and Mercator is too short. The same between Mercator and Equirectangular.
Besides there can be a stop-point in the slider when the Mercator is reached (or zero point of the slider set to Mercator).

2. In Panini general a vertical compression slider may be added. Panoramas of tall objects stitched in Panini have the middle part correct, but the top and bottom enormously tall. Introducing this, Panini, Equirectangular Panini and Panini General may be merged (with the zero point set to equirectangular Panini, as it is).
2a. Slider range.The compression slider in Panini can be extended to negative values. The value = 0 is equal to the rectilinear projection. Sometimes objects, for example photographed from a very short distance are still rounded, the process will be faster than adding horizontal lines and optimizing the barrel distortion (not so perfect, but close).
2b. Different compression for the left and right side of a panorama in the horizontal compression. The same for the upper and lower part, two sliders - these two sliders will be the most useful.

3. Different projections horizontally and vertically. This is the key to perfect panoramas. To use Rectilinear or Panini horizontally and Equirectangular-Mercator-Cylindrical vertically.
Horizontal rectilinear projection will preserve the straight lines and E-M-C projection vertically will allow adjust the panorama proportions.
Two vertical sliders will allow to control the distance and the position of the object in the middle of the panorama.

It may seem complicated at the first read, but it is completely understandable when we try to adjust a panorama in a graphic editor that can only rescale images linearly.

perfect_proportions.jpg
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