Hi Peter
On Nov 23, 11:48 pm, Peter Gawthrop <[EMAIL PROTECTED]> wrote: > Hi Tom, > > I agree that "control of perspective" is THE important new > dimension in photography and so I hope that pvQt can contribute to > that. > > As I said in a previous mail to this group, the mathmap plugin to > GIMP is another possibility for playing with perspective. I have a > number of functions which transform equirectangulars (from hugin) > in various ways -- see > > http://www.lightspacewater.net/Software/ > > Maybe these are relevant to pvQt? > Very interesting. How long does it take mathmap to transform a 20 megapixel image? What pvQt does is map the input format onto the sphere, and make a perspective (rectilinear-stereographic family projection) of that. It can't transform between arbitrary input formats, so I doubt if it has an equivalent for erect2gencyindrical.mmc. But I would guess that moving the eye point in pvQt generates the same views as your erect2genstereographic.mmc, from any input image format. By choosing a "wrong" input format, you can get some transformations that might be useful; but none of the classical "PTools" remappings. Another route to new perspectives is to purposely specify a "wrong" field of view. To make it easier to experiment along these lines, version 0.5 will let you cycle through all the supported non-cubic projections, and adjust the image FOV (along both axes), without reloading the image. As I see it, the purpose of all these perspective manipulations is to make more convincing pictures. In most cases this means pictures that "look right", though some subjects really come across best in "weird" perspectives. But there is only so much you can do with single point perspective. The art of multi-point perspective drawing, that began in the Renaissance, had by the 18th century produced some of the most powerfully convincing (though totally false) views of architecture and landscapes ever seen (e.g. Giovanni Paolo Panini's views of monumental Roman interiors). I think it would be nice if photographers could do that. The ultimate goal for panoramic software developers should be to support creating images with multiple perspectives. But enough philosophy. Cheers, Tom --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ To post to this group, send email to hugin-ptx@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/hugin-ptx -~----------~----~----~----~------~----~------~--~---
