If SNS-HDR allows to input images with random bright/contrast level adjustments previously made (for instance those output from any RAW converter without strictly zeroed settings), then it probably performs a sub-optimum blending in terms of SNR and sharpness (as Photomatix or Enfuse do). In this situation sensor linearity becomes our ally to allow creating a seamless composite where only highest exposure non-clipped pixels are used. I have to test whether alpha masking of the source TIFFs, helps SNS-HDR to prioritize which image from the sequence to use.įor maximum noise reduction and sharpness the input images must be linear (or affected by a pure gamma curve that can be easily undone). Tree branches in the wind are amongst the sources for ghosts that are the hardest to solve. Some very good exaples have been shared with him, but he probably wouldn't mind getting some more example images to test with. I'm sure that Sebastian is open for suggestions, but it is not a simple issue. I've shared some suggestions/links for Ghost reduction methods on Sebastian's forum, but it's up to him to decide if that is compatible with the inner workings of SNS-HDR. Sebastian said he was working on it, but also noise reduction had to be improved (to hide the local noise jumps). The topic, and in an attempt to improve SNS-HDR's handling of ghosts, was addressed on the SNS-HDR forums during the initial phases of the development of version 2. Replacing some of the image's detail with that from another image can cause sudden local jumps in noise. Quote from: BartvanderWolf on November 07, 2016, 12:42:22 pm Hi Kirk,ĭeghosting is not as simple as it may seem to a human, especially when we have to deal with different exposures from which to choose. It looks like Adobe RGB is used for Raw input. The program can also open Raws (with DCraw) and blend those. Save the individual bracketed exposures as 16-bit/channel TIFFs with the color profile of choice. My normal workflow is Use my preferred Raw converter to make use of CA correction and other specific strengths of that tool. Upon saving there is an option to save in sRGB, or retain the document's colorspace/ profile. The display profile is selected at the top right in the middle of that block, under the display icon. There is no selection of a working profile as such, a lot of the processing is done in floating point and or with the GPUs. You can see the embedded profile by hovering the mouse pointer over the little camera icon in the top menu bar (at the right of the block of icons at the top left) or change it by clicking that icon (in case the missing source profile is known to be something else). I'm not 100% sure, but images without profile get sRGB assigned.
Featuring a wide array of tools, the software has been optimized to make the generated images look natural. It allows users to create HDR images from sequences of photos, as well as process single images. SNS-HDR is a software for processing images using the HDR technique. It consists in capturing several images of the same scene at different levels of exposure and subsequently combining them into one complete image
In order to capture the full range of luminosity of such scenes, the HDR technique is used. As a result, the image will contain underexposed or overexposed areas, which cannot be adequately corrected at the editing stage.
When the scene being photographed has both very dark and very bright areas, the camera is unable to capture its entire range of luminosity. The HDR technique makes it possible to create an image so faithfully to how the scene is perceived in reality.
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