I have already noticed a 'strange' behaviour of the magnifier in the control point editor panel ( but never understood it ). Today I loaded in hugin a few astronomical images ( see thread [1] ), and while adding a few cp I noticed that when the magnifier was positioned on the dark background ( no bright stars in the fov of the magnifier ) it showed a 'bright and dark texture', I couldn't understand where it came from. Searching in the code found that before being displayed the magnifier is 'contrast enhanced' ( the darkest part of the image is converted to back, the brightest part is converted to 255, max brightness ). This is to help identifying 'features' in the images. But when the magnifier is placed on a low contrast part of the image ( a generic image, not the astronomical image I refered above ) this amplification ( contrast enhancement ) could be very high and this seems a little bit confusing to me ( I mean the magnifier show a very high contrast on a part of the image which has very low contrast ). I think we could/should limit the maximum contrast enhancement.
> in file CPImageCtrl.cpp line 601 > // transform to range 0...255 > vigra::transformImage(vigra::srcImageRange(magImg), > vigra::destImage(magImg), > vigra::linearRangeMapping( > VT(minmax.min), VT(minmax.max), // > src range > VT(0), VT(255)) // dest range > ); [1] http://groups.google.com/group/hugin-ptx/browse_thread/thread/06c616c5f57c6787# [2] http://www.davidefabbri.net/files/panorama/magnifier.zip -- 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 hugin-ptx+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx
