Allow user change photo labels (and update Container.item_label) at the same time.

[HowcanoeWang]

Discussed in #75

^{Originally posted by youngdjn February 1, 2023}
This is potentially a Python newbie issue -- apologies if so.

I am trying to change the labels of the photos (Photo.label) in my project, but this does not propagate to downstream places where I think the photo label is (should be?) used.

For example using this project, if I run:

import easyidp as idp
from pathlib import Path
msproj = Path("/path/to/project/example-multifolder.psx")
ms = idp.Metashape(msproj, chunk_id=0)
ms.photos[57].label

I get '100MEDIA-DJI_0165'

Then I attempt to rename them:

for i in range(len(ms.photos)):
    ms.photos[i].label = "newlabel" + str(i) 
ms.photos[57].label

and I get 'newlabel57'.

But then I run back projection

img_dict_ms = roi.back2raw(ms)
img_dict_ms

And the labels in the returned dict are the original ones:

{'1': {'100MEDIA-DJI_0165': array([[4741.6161679 ,  684.46603374],
         [4735.11907978,  712.14368673],
         [4718.00310275,  728.6865289 ],
         [4722.27333877,  728.17479155],
         ...

And also when running show_roi_on_img() it only works when I reference the photos by their original labels, like:

ms.show_roi_on_img(img_dict_ms, "1", "100MEDIA-DJI_0165")

and it doesn't work when I run:

ms.show_roi_on_img(img_dict_ms, "1", "newlabel57")

Can you suggest a way to fully change the labels?

The reason for this request is that I am trying to give the photos more meaningful labels so that I can more easily link the photo labels to the original photo files.

[illrayy]

You are changing the "ms.photos.label". However, when using the roi.back2raw() function, the parameter passed is "ms.photos.item_label", which is a dictionary, different from "ms.photos.label"
So to change the labels correctly, you need to modify the "ms.photos.item_label", here's my practice

new_dic = {}
for i in range(len(ms.photos)):
new_key = "newlabel_" + str(i)
new_dic[new_key] = i
ms.photos.item_label = new_dic

Notes

1. After using roi.back2raw(),modifications will be stored in the *.psx file, which is irreversible, so please make a backup of the *.psx file.
2. I only modifed the "ms.photos.item_label", the "ms.photos.label", "ms.photos.label" hasn't changed. So you may need to re-read the *.psx file after saving it, or do what you did with "ms.photos.label" at the same time. But as I practice, it doesn't matter whether I do that or not.

[HowcanoeWang]

You are changing the "ms.photos.label". However, when using the roi.back2raw() function, the parameter passed is "ms.photos.item_label", which is a dictionary, different from "ms.photos.label" So to change the labels correctly, you need to modify the "ms.photos.item_label", here's my practice

new_dic = {} for i in range(len(ms.photos)): new_key = "newlabel_" + str(i) new_dic[new_key] = i ms.photos.item_label = new_dic

Notes

1. After using roi.back2raw(),modifications will be stored in the *.psx file, which is irreversible, so please make a backup of the *.psx file.
2. I only modifed the "ms.photos.item_label", the "ms.photos.label", "ms.photos.label" hasn't changed. So you may need to re-read the *.psx file after saving it, or do what you did with "ms.photos.label" at the same time. But as I practice, it doesn't matter whether I do that or not.

Please refer to this comment: #75 (comment)

Actually, EasyIDP only reads the *.psx files and unable to change that file. You may need to rename the labels every time you load that project.