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Image previews: central slice instead of first
It would be great to have the image previews of the central Z slice instead of the first one. If the Z-stacks are good, they all start completely black for me.
Adding to this, it would also be great if the thumbnail would show a normalized version of the image, taking into account the actual min and max of the full stack. This would increase the usability when working with 16-bit images that were acquired with 12-bit cameras (i.e. range 0-4095 within an UnsignedShortType).
@imagejan this kind of normalizing could take a long time, because the min and max have to be found first (in large images this could take a while).
As far as I know @oole has tried some stuff in this direction?
@imagejan this kind of normalizing could take a long time, because the min and max have to be found first (in large images this could take a while).
For thumbnails we could only calculate the min/max for the given thumbnail? However, this might be misleading?!
For thumbnails we could only calculate the min/max for the given thumbnail? However, this might be misleading?!
This would be at least more useful than displaying an entirely black thumbnail (which is the case in most of our use cases, in fact). Alternatively, make it an option in the preferences, or allow choosing a different LUT for thumbnails, or allow setting a high gamma value for display?? Just some ideas...
This issue just came up again in a discussion with @bnorthan (and also did not remain unnoticed during a KNIME Image Processing training at EMBL in June 2019).
Would showing the middle slice, normalized to the min and max of that slice, or the thumbnail of that slice work??
