Changes between Initial Version and Version 1 of Ticket #15715, comment 3


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Timestamp:
Aug 2, 2024, 12:08:27 PM (15 months ago)
Author:
Tom Goddard

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  • Ticket #15715, comment 3

    initial v1  
    55I do not think it should be hacked by changing the default thresholds from 1 to 0.999.... That doesn't address the main issue that when you hand adjust to get best appearance the sensitivity makes it very difficult to get the apperance you want.
    66
    7   All that said, that problem has received little attention because the use of volume rendering in EM is minimal, so there are usually about 100 higher priority problems to work on.
     7All that said, that problem has received little attention because the use of volume rendering in EM is minimal, so there are usually about 100 higher priority problems to work on.
    88
    9   One small tip.  To fix the bright pixels it is generally easier to move the height 1.0  part of the curve to a higher threshold level by typing in a new value than to try to adjust its height with the mouse or a command.  So for EMDB 9118 the largest intensity is 0.2998, and if you click on the right most node on the brightness curve in Volume Viewer and type in 0.3 for its level that removes the hot spot.  I agree you should not have to do this tweak.  But really the variation of the brightness at values near 1 needs to vary in a different way to improve the entire visualization.  The current way it works took months of development 20 years ago, and it could certainly be done better.
     9One small tip.  To fix the bright pixels it is generally easier to move the height 1.0  part of the curve to a higher threshold level by typing in a new value than to try to adjust its height with the mouse or a command.  So for EMDB 9118 the largest intensity is 0.2998, and if you click on the right most node on the brightness curve in Volume Viewer and type in 0.3 for its level that removes the hot spot.  I agree you should not have to do this tweak.  But really the variation of the brightness at values near 1 needs to vary in a different way to improve the entire visualization.  The current way it works took months of development 20 years ago, and it could certainly be done better.