Downconversion request (of an interesting example)

[X___]

I found this .NET example as a potential path to circumvent requiring to have Python installed to read PNG metadata:

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q0000019lbVCAQ&l=en-US

Unfortunately, I don't use 2022 (subscription).

Would any one be so kind as to down convert it to 2021?

Thanks!

[ShaunR]

Back-saved to 2009

Untitled 1.vi

BTW. Snippets don't work on Lavag. Always post the VI.

Edited October 30, 2023 by ShaunR

[X___]

Thanks. I wished I could, but the link I posted only provides the snippet.

Edited October 30, 2023 by X___

[X___]

This is going away from the original topic, but after a bit of trial and error (and prodding of ChatGPT), I came to the conclusion that there is no other way, in order to extract custom metadata from a PNG file, than to write a custom parser, as .NET only provides access to a series of predefined tags:

https://learn.microsoft.com/en-us/dotnet/desktop/winforms/advanced/how-to-read-image-metadata?view=netframeworkdesktop-4.8

https://learn.microsoft.com/en-us/dotnet/api/system.drawing.imaging.propertyitem.id?view=dotnet-plat-ext-7.0

There is a third party .NET framework to achieve that goal (https://products.groupdocs.com/metadata/net/extract/png/) but at $1,700 a year per license, I guess the motivation isn't there...

[ShaunR]

Didn't your AI guru suggest exiv2?

[X___]

9 hours ago, ShaunR said:

Didn't your AI guru suggest exiv2?

No, it did not. It did mention that groupdocs was not free though!

What puzzles me is that it did not mention that this was a standard feature of the python PIL package:

from PIL import Image
import matplotlib.pyplot as plt

filename = '/content/drive/MyDrive/my image.png' # point to the image
im = Image.open(filename)
im.load()
plt.imshow(im)
plt.show()

print(im.info)
print('Metadata Field: ', im.info['Metadata Field'])

which is probably the approach I will use in my migration to Python experiment.

[ShaunR]

13 hours ago, X___ said:

No, it did not. It did mention that groupdocs was not free though!

What puzzles me is that it did not mention that this was a standard feature of the python PIL package:

from PIL import Image
import matplotlib.pyplot as plt

filename = '/content/drive/MyDrive/my image.png' # point to the image
im = Image.open(filename)
im.load()
plt.imshow(im)
plt.show()

print(im.info)
print('Metadata Field: ', im.info['Metadata Field'])

which is probably the approach I will use in my migration to Python experiment.

You've really been gulping down that AI coolade, huh? 

I was going to mention PIL but IIRC it only supports standard tags (like the .NET that you criticized) so didn't bother to mention it.

 

[X___]

8 hours ago, ShaunR said:

You've really been gulping down that AI coolade, huh? 

I was going to mention PIL but IIRC it only supports standard tags (like the .NET that you criticized) so didn't bother to mention it.

 

Koolaid? Not really. I like the sifting through stackexchange, distilling it to the necessary stuff and providing link to the source in case of doubts.

PIL does return custom metadata (at least text ones) just fine.