On 29 Jan., 20:55, Syv Ritch <[email protected]> wrote: > 1. How do I indicate to hugin which one is the median exposure?
Hugin detects correctly which the median exposure is by looking at the images. So for this purpose it doesn't matter which sequence the images are inside the stacks. But if you use align_image_stack, it assumes that the median exposure is in the middle (I tried with 3-shot brackets), and if it isn't it wil not deliver it's optimal result: I tired with the stacks straight as my Canon camera produces them, so image 0, 1, 2 having exposures +0, -2 and +2 EV. align_image_stack produced CPs between image 0 and 1, and 1 and 2. This isn't optimal, because now it has matched the median shot with the darkest, and the darkest with the brightest. When I put the median shot one down (so, swapped image 0 and 1), align_image_stack did the same, but now this was the right thing: darkest and median, and median and brightest. So my advice is: put the median exposure in the middle. Or use cpfind as interstack CPG, in which case you'll get matches between all images, and I feel this won't do no harm - but align_image_stack is indeed very good at what it does. > 2. Do I indicate the stacks first in the image tab and then do the control > points or do the control points first and then indicate the stacks with the > image tab? or should I not bother about the stacks and let hugin work its > magic? You have to set the stacks in the image tab for the 'panorama with stacks' type of CPG mode to work. This is silly, because it requires you to set all the stacks manually. I wrote a plugin for the purpose which, if you have a plugin-enabled hugin, you're welcome to use: http://bazaar.launchpad.net/~kfj/+junk/script/view/head:/main/make_stacks.py I didn't put this plugin into public circulation, because I had technical questions regarding the internal stacking mechanism which noone cared to answer when I asked for help, and because the issue of passing arguments to plugins (like, how many stimages per stack, which would make sense for this one) is still not resoved, so the current implementation just makes stacks of three images, but with a text editor you can change the number to whatever you like in a few seconds. Be warned - it may not always work as expected. But the stacks you set won't necessarily be the stacks the exposure fusion will choose to fuse - it ignores the stacks you set and does what it thinks is right (which usually is the same thing, but sometimes fails:) http://groups.google.com/group/hugin-ptx/browse_thread/thread/1f13ff6ac1c52b05/92d8c5d86d90e14c?lnk=gst&q=honout+stacks#92d8c5d86d90e14c Kay -- 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 [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/hugin-ptx
