I added an experimental Equalize option to a branch of Hugin++ I would appreciate any feedback from those trying it and/or looking at the source code and/or knowing more on the theory side than I do (which wouldn't take much).
The idea is to modify the individual brightness levels monotonically (but often not smoothly) to get a flat histogram, which should tend to make image details more visible. This only affects what you see while constructing the panorama. It does not affect the pixels going into the result. In the current experimental version, it only applies to input images with 16 bit integer values (not to 8 bit and not to float). I think it is most useful for 16 bit, but has some value for other input types. Before making it non "experimental" I would extend it to all input types. It currently occurs during the translation from 16 bit to 8 bit (needed to get an image that can be displayed in the GUI). My intent is to affect only that GUI display. But I haven't yet tracked all the possible call paths to find/fix any possible other affects. The setting is per image and currently lasts only during a session. It ought to be saved in the .pto file. But I want to be surer about what I'm doing before messing with the .pto file format. I put the UI for controlling it in the mask tab, because it is significantly more convenient there than elsewhere (try it and that should be clear) even though logically it is a property of the image, not the masks and it affects CP editing at least as much as mask editing. [image: eq.JPG] It has 3 different modes (other than the default choice of Off). Stable has very little impact on hue or saturation and tries to adjust just intensity. It scales each pixel as a single object (scales g,r,b equally within one pixel). It may clip (decrease saturation, shifting hue) for pixels relatively close to white in photos that have very few pixels that are really close to white. Intermediate treats all values independently in one pool. Its affect on saturation and hue depends heavily on the original distribution. It typically distorts hue more than stable does, but that still usually isn't very much. Distorted treats each channel independently. This usually causes big shifts in hue, making the picture look weird. But it also should give the largest improvement in the ability to see details. -- A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ --- You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. To unsubscribe from this group and stop receiving emails from it, send an email to hugin-ptx+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/hugin-ptx/e8477762-602b-40c7-9023-9b0096d4e905n%40googlegroups.com.
