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Page to increase the dynamic range by fusing two pictures

PostPosted: Tue Nov 11, 2014 10:39 am
by e.engelmann
I have now updated and improved the page of my web site which allows to fuse online two differently exposed pictures: http://www.milanofotografo.it/englishFotografiaHDR.aspx . In particular there is now a new gradient shape, expecially useful with images containing bright low contrast parts.
In this way it is possible to get correctly exposed pictures of scenes which otherwise would result partially eighter too dark or burnt.
The page offers also the possibility to correct horizontal and vertical shifts, so to make it possible to apply the algorythm also on pictures shot with the camera handheld.
There is also a help page.
Critiques and suggestions are welcome!
Note: If the images are larger than 12 Mp each, there could be an error!

The image below (Decorations on the voult of the apse of the Chartreuse of Garegnano) was obtained using the algorythm contained in the page.

Image

Re: Page to increase the dynamic range by fusing two picture

PostPosted: Wed Nov 19, 2014 9:52 pm
by e.engelmann
New important update!
Now it is possible to start also from three differently exposed pictures, not only from two like before!
All the interested ones are invited to try it!

Re: Page to increase the dynamic range by fusing two picture

PostPosted: Tue Dec 23, 2014 11:49 pm
by e.engelmann
New update of the page: it is now possible to correct the shift also in case of three starting picture, not only in the case of two as before!
Try it out!
Critics and suggestions for future improvements are welcome!
The picture of the portico was obtained from three pictures on a scale of 2 stops taken with the camera handheld.
Image

Re: Page to increase the dynamic range by fusing two picture

PostPosted: Sat Jul 04, 2015 8:27 pm
by e.engelmann
I have just added a tool which helps estimating the rotation differences between the bracketed pictures. There is also a dedicated instruction page: http://www.milanofotografo.it/englishFotografiaProveIstruzionAnalisiAngolo.aspx

Re: Page to increase the dynamic range by fusing two picture

PostPosted: Thu Mar 22, 2018 1:48 pm
by e.engelmann
Important improvement: I have just added a new not local method, to address the problem of contrast deletion in case of certain images. Instructions and an example have been added on the Help page.
I'm not sure I can use the word "mapping" for this new method!