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Friday, 22 June 2018 Dereel Images for 22 June 2018
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Winter comes
Topic: general Link here

The last few days we have had mild frosts (ice on the grass), but today we finally had frozen water:

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One of the most interesting things I've found from having an infrared thermometer is how different temperatures are in different places. The ice was only about 1.5 mm thick, but I measured a very constant -2.7°. Elsewhere I measured down to -4.1°, but the weather station, 3.5 m above the ground, registered a minimum of 1.8°.

Improving Hugin processing
Topic: technology, photography, opinion Link here

So now I have a better understanding of how Hugin processes panoramas. Spent a bit of time playing around with my Hugin script, and after a few surprises added:

   cropstack.php 0*
+  # Create project file
+  echo creating project file
+  pto_gen -o my.pto 0*
+  cpfind -o my.pto my.pto
+  # Does this help? XXX
+  celeste_standalone -i my.pto -o my.pto
+  cpclean -o my.pto my.pto
+  # options: -a  auto align mode
+  #          -l  level horizon
+  #          -s  select projection
+  autooptimiser  -a -l -s -o my.pto my.pto
   echo Make your panorama, save to $NAME.tif
   xtset Creating $OUTFILE, save to $NAME.tif
   nice -5 hugin [01]?

What were the surprises? The first time round I got some really poor control points. After a bit of investigation, it proved that running celeste_standalone is really necessary to clean up cloud images and similar. In the past I had thought that it was pretty ineffective, but that was because every time I ran it, it had already run. Also, the last program is called autooptimiser, and not autooptimizer.

The good news is that I have found out (I think) how to stop Hugin from changing colour and exposure. These are done by parameters to autooptimiser, so simply omitting them solves the problem—almost. I have still found minor differences in the image parameters that I need to investigate. But at any rate I can now automate all my processing up to positioning, maybe masking, cropping and stitching. The next step is to do this for all panoramas so that I can just stitch one after the other.

Transfer speeds in relation
Topic: technology, multimedia, opinion Link here

In the past I have done my backups for teevee to an external USB disk. It made sense to connect it directly to teevee—I thought. But though the disk can handle USB 3.0, teevee can't. It proved much faster to connect the disk to eureka with USB 3.0 and back up over the (1000 Mb/s) Ethernet.

As a result, I now have round 24 TB of total storage attached to eureka:

=== grog@eureka (/dev/pts/29) ~ 21 -> df -c
Filesystem  1048576-blocks      Used     Avail Capacity  Mounted on
/dev/ada0p2         39,662    27,043     9,445    74%    /
devfs                    0         0         0   100%    /dev
/dev/ada0p4         39,662    12,965    23,524    36%    /destdir
/dev/ada0p5         29,000     4,333    22,347    16%    /photowork
/dev/ada1p2      2,820,026 2,517,020    77,404    97%    /home
fdescfs                  0         0         0   100%    /dev/fd
procfs                   0         0         0   100%    /proc
/dev/ada2p1      7,629,565 4,625,637 2,927,632    61%    /Photos
/dev/da1p1       1,907,067 1,606,582   147,919    92%    /dump
/dev/da3p1       3,815,019 2,898,668   611,149    83%    /videobackup
/dev/da2p1       7,629,565 4,625,809 2,927,460    61%    /photobackup
total           23,909,569 16,318,059 6,746,883    71%

There's another 6 TB on teevee, but it can't see eureka:/photobackup.

Saturday, 23 June 2018 Dereel Images for 23 June 2018
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New freezer
Topic: general Link here

Phone call from The Good Guys in Ballarat early this morning to tell me that they wanted to deliver the new freezer today. That's surprising for a couple of reasons: firstly, it was Saturday, and secondly the web site had told me that the item was not available in Ballarat—that's the only reason I arranged for delivery.

Still, it was too late to change the delivery method—maybe. But I didn't think about that on time, so shortly after noon Shane showed up with the freezer.

No surprises with the freezer itself: it's pretty much identical with the two we already have, including the positively infuriating slider mechanism for the baskets. Nothing seems to have changed since we bought the first one, probably about 18 years ago. But it's the only game in town—the only other freezer in this size range is from Westinghouse, and they're too polite to put in baskets. And this way, at any rate, I didn't need to repack the baskets, just put the old baskets in the new freezer.

What to do with the old freezer? It still works, and we might get a couple of hundred dollars for it, but after our recent experience with dish washers it sounded like a better option to keep it for emergencies, including not only failed freezers, but also sudden influxes of deep frozen food. So it ended up in the garage:

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That's not the best way to put it: my car is positioned in a way that prevents opening the door. If we use it, we'll have to rotate it 90° clockwise.

New Hugin workflow
Topic: photography, technology Link here

House photo day again today, and the first time that I used the new Hugin workflow. It worked mainly, but for some reason (almost certainly a bug in the Hugin script) it didn't save the project files. I'll need to look at that.

Other things that could do with improvement are the wait while it does its thing, and the fact that my renaming doesn't quite work: pto_gen checks the source of symlinks, and uses the original name. Maybe I can get the thing to create all project files in place and just copy them to the build directory.

This page contains (roughly) yesterday's and today's entries. I have a horror of reverse chronological documents, so all my diary entries are chronological. This page normally contains the last two days, but if I fall behind it may contain more. You can find older entries in the archive. Note that I often update a diary entry a day or two after I write it.     Do you have a comment about something I have written? This is a diary, not a “blog”, and there is deliberately no provision for directly adding comments. But I welcome feedback and try to reply to all messages I receive. See the diary overview for more details. If you do send me a message relating to something I have written, please indicate whether you'd prefer me not to mention your name. Otherwise I'll assume that it's OK to do so.

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