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EXTRACT_SLICE [message #92360]

Sun, 29 November 2015 07:20

amin farhang
Messages: 39
Registered: November 2010

Member

Dear All,

Is there anyone to know that, how extract a slice from volume where is perpendicular to xy plane and then rotated around z by 45 degree? i.e. passing through the diagonal of xy square

The normal EXTRACT_SLICE first rotate around z-axis then rotate about x-axis:

slice = EXTRACT_SLICE(vol,30,30, 15.0,15.0,15.0, 90.0,0.0,45.0, OUT_VAL=0B)

Therefore in practice it just rotate the xz plane about its center 45 degree and do not return the desired plane.

Example:
In this example the xy plane is rotated around its center every 5 degree and do not rotate around z axis:

vol = RANDOMU(34752, 40, 40, 40)
FOR i=0, 10 DO vol = SMOOTH(vol, 3)
vol = BYTSCL(vol(3:37, 3:37, 3:37))
xvolume,vol
cgloadct,33

for i=0,120,5 do begin &$
slice = EXTRACT_SLICE(vol,30,30, 15.0,15.0,15.0, 90.0,0.0,i, OUT_VAL=0B) &$
cgcontour,slice,/fill &$
; for seeing the sequence images just enter a number
read,a

Best regards,

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By: amin farhang on Sun, 29 November 2015 07:20

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