Z Projections

Posted by Knecht, David on Mar 15, 2010; 7:15pm
URL: http://imagej.273.s1.nabble.com/Z-Projections-tp3688948.html

I looking for an explanation of the math behind Nearest Point vs. brighest point projections and the influence of the various opacity setttings in 3D project.  It would be nice if this were explained in detail somewhere with example images.  
From documentation:
Surface Depth-Cueing and Interior Depth-Cueing. Sur- face Depth-Cueing works only on nearest-point projections and the nearest-point component of other projections with opacity turned on. Interior Depth-Cueing works only on brightest-point projections. For both kinds, depth-cueing is turned off when set to zero (i.e. 100% of intensity in back to 100% of intensity in front) and is on when set at 0 <n 100 (i.e. (100−n)% of intensity in back to 100% intensity in front). Having independent depth-cueing for surface (nearest-point) and interior (brightest-point) allows for more visualization possibilities.

  For interior cueing with brightest point, given a ray trace through a volume, is the pixel value of each pixel reduced by a different % depending on its depth and then the values are compared for brightest?


Dr. David Knecht    
Department of Molecular and Cell Biology
Co-head Flow Cytometry and Confocal Microscopy Facility
U-3125
91 N. Eagleville Rd.
University of Connecticut
Storrs, CT 06269
860-486-2200
860-486-4331 (fax)