How 'better quality' is detemined?

[itsdapi]

I have lots of camera images that probably have the same name (DSC1234.jpg). Does the de-duplicate processed by the server or by the immich-go? And I wonder if two different images happened to share the same name, would it be marked as 'better quality' or 'same quality'?

[simulot]

We may have 2 kinds of duplication:

• Album's photos vs Photos of year XXXX
• Google photos compressed photo vs uncompressed phone's photos

Immich-go detect the 1st kind based on the file name, the date of capture and the file size.
The 2nd kind is based on file name and date of capture. The largest files is "declared" as the best quality.
Not prefect, but do the job for most of the users.

Immich calculate the check sum of the file and refuse to import any duplicate in the internal library.
There is another immich's de-duplication feature based on image similarity.

[itsdapi]

So, the situation I describe will have no issues if the cameras share the same name because they were taken on different dates.

Super great job on the excellent tool!