How can I set the save path?

[Kairos326]

Hello I tried my best to find how to change the save path of image, but I can't.
Do I have to make new node or is it hidden so that I can't find?

[ethanjli]

Are you trying to have raw images be saved to somewhere other than /home/pi/data/img? If so, unfortunately the PlanktoScope software currently does not support that. What problem are you trying to solve by changing where images get saved?

As a hacky workaround, the best we can do right now is for you to copy all of your images in /home/pi/data/img to external storage, delete the /home/pi/data/img directory, and replace it with a symlink to some other directory. For example, if you want to instead save your images to /home/pi/my/favorite/directory, you can open the Cockpit Terminal at http://planktoscope.local/admin/cockpit/system/terminal (username pi, password copepode), and run the following commands:

cd /home/pi/data
sudo rm -rf img
ln -s /home/pi/my/favorite/directory img

(note: the above commands will delete all of your data in /home/pi/data/img, so make sure to download any data you don't want to lose before running the above commands; when you run the sudo command, it might ask you to enter the password copepode)

[Kairos326]

Thank you for your replying!
Fortunately, I found how to do by spending 4hours after I wrote it.

[ethanjli]

I'm glad you found something which works for you! But I'd still like to better understand what problem you're trying to solve by changing where images get saved - if you're able to share any information about that, it could help us to identify specific improvements to make to the software in the future 🙂

[Kairos326]

Problem: I wanted to change default path and format (e.g. from {/home/pi/data/img/"project_name"/....} to {/home/pi/data/img/"yyyymmdd"/"hhmm".jpg}

Solve: I found the configure file at {/home/pi/device-backend/control/pscopehat/planktoscope/imager/init.py}

In there, you can find 2 variables.
"self.__export" <<< It sets path.
"filename" <<< Yeah. It says what it is for.

Caution If you want to change not only filename but also path,
you MUST change the code:

if os.path.exists
(blabla codes)
else
os.makedirs(self.__export_path)

TO

if not os.path.exists(self.__export_path);
os.makedirs(self.__export_path)

Or acq_ID will bother you.

I'm not good at English, but I hope it helps :>

[ethanjli]

Ah ok, thanks for describing what you were trying to do! If you plan to run the PlanktoScope's segmenter on these datasets, I would recommend testing whether it can handle your new file path naming scheme, by collecting a small dataset (maybe 10 images) and trying to run the segmenter on it - if the segmenter doesn't know how to handle this changed path structure, it might crash without giving an error message in the Node-RED dashboard.

[Kairos326]

Oh... Thank you, actually I did't have plan to use segmenter, so if someone plan to use segmenter, unknown problem could be happen.

I think {exec}node in Segmenter tab should be checked to avoid that problem.