[MINC-users] mincaverage bug

[Alex Zijdenbos]

Hi Andrew,

False alarm - user error :) I had started with this command line

mincaverage .... avg.mnc -sdfile sd.mnc

and somewhere along the way of experimenting the '-sdfile' opt dropped
off, resulting in

mincaverage ... avg.mnc sd.mnc

which evidently was not what I had intended :)

Sorry

-- A

On Tue, Dec 13, 2011 at 3:53 PM, Andrew Janke <a.janke at gmail.com> wrote:
> Hi Alex,
>
> On 14 December 2011 06:42, Alex Zijdenbos <zijdenbos at gmail.com> wrote:
>> I just stumbled across a bug in mincaverage. If you try to average a
>> list of volumes that have a small range for the data type (e.g., byte
>> 0-3), the average (correctly) inherits that data type- and range. But
>> obviously a 4-valued average is hardly useful; so I thought the output
>> type options would come to the rescue. Alas, they only seem to affect
>> the sd volume, not the average. In other words, running something like
>> this:
>>
>>   mincaverage -short -range 0 1000 in1.mnc in2.mnc avg.mnc -sdfile sd.mnc
>>
>> will give sd.mnc a short type and the advertised range; but not avg.mnc.
>
> I can't seem to reproduce this behavior you speak of?
>
> $ mincaverage -double bp-native.mnc a.mnc
> $ mincaverage -double bp-native.mnc d.mnc
> $ mincaverage -short -range 0 1000 bp-native.mnc s.mnc
>
> cai-harold:~$ mincinfo a.mnc d.mnc s.mnc
> file: a.mnc
> image: unsigned byte 0 to 255
> image dimensions: zspace yspace xspace
>    dimension name         length         step        start
>    --------------         ------         ----        -----
>    zspace                    267      1.01563     -135.079
>    yspace                    217      1.01563     -109.688
>    xspace                    267      1.01563     -135.079
>
>
> file: d.mnc
> image: signed__ double 0 to 5.4909507159588706315
> image dimensions: zspace yspace xspace
>    dimension name         length         step        start
>    --------------         ------         ----        -----
>    zspace                    267      1.01563     -135.079
>    yspace                    217      1.01563     -109.688
>    xspace                    267      1.01563     -135.079
>
>
> file: s.mnc
> image: unsigned short 0 to 1000
> image dimensions: zspace yspace xspace
>    dimension name         length         step        start
>    --------------         ------         ----        -----
>    zspace                    267      1.01563     -135.079
>    yspace                    217      1.01563     -109.688
>    xspace                    267      1.01563     -135.079
>
> ?
>
> mincaverage uses voxel_loop so if there is a bug in there it will
> affect a number other minc tools as well.
>
>
> ta
>
>
> a
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