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lovasoa / dezoomify

Dezoomify is a web application to download zoomable images from museum websites, image galleries, and map viewers. Many different zoomable image technologies are supported.
https://dezoomify.ophir.dev
GNU General Public License v2.0
670 stars 76 forks source link

Google Arts&Culture Not Grabbing Max Resolution #357

Closed cygnusthesw44n closed 4 years ago

cygnusthesw44n commented 4 years ago

Hello,

I had just started using dezoomify recently after months long of a hiatus. I use it for google arts and culture.

Lately, Almost every single image I grab comes off in low-resolution. This is evident on the size of the files, most range from 1-2mb and even kb at times. In contrast to this, on the google arts&culture site I could zoom in much further and see more detail on the same image.

One example is the image in the link below. (set to googlearts&&culture in dezoomify) https://g.co/arts/5MRXW34E1dMzabuE8

the size turns out to be just a measly 1mb with a resolution of 1926*1156. In the past every image I've dezoomify had always resulted in a larger file and resolution.

Help on a solution would be wonderfully appreciated!.

lovasoa commented 4 years ago

Hello, I'm closing this as a duplicate of #296, but I'm still open to discussion about this topic. The limit is artificial and could be set higher. You can comment with your opinion on #296.

lovasoa commented 4 years ago

Oh, actually, let me reopen this issue. It is not a duplicate. UI.MAX_CANVAS_AREA is 268435456 and the available zoom levels are (according to dezoomify-rs, which downloads the largest image without problems):

0. Australian troops disembarking at Alexandria after the evacuation of Greece - Ivor Hele (  482 x   289 pixels,     1 tiles)
1. Australian troops disembarking at Alexandria after the evacuation of Greece - Ivor Hele (  963 x   578 pixels,     4 tiles)
2. Australian troops disembarking at Alexandria after the evacuation of Greece - Ivor Hele ( 1926 x  1156 pixels,    12 tiles)
3. Australian troops disembarking at Alexandria after the evacuation of Greece - Ivor Hele ( 3851 x  2311 pixels,    40 tiles)
4. Australian troops disembarking at Alexandria after the evacuation of Greece - Ivor Hele ( 7701 x  4621 pixels,   160 tiles)
5. Australian troops disembarking at Alexandria after the evacuation of Greece - Ivor Hele (15401 x  9241 pixels,   589 tiles)
6. Australian troops disembarking at Alexandria after the evacuation of Greece - Ivor Hele (30802 x 18482 pixels,  2257 tiles)
7. Australian troops disembarking at Alexandria after the evacuation of Greece - Ivor Hele (61604 x 36963 pixels,  8833 tiles)

The largest zoom level that fits into dezoomify's constraints is level 5, but it downloads only level 2.

It is because dezoomify resolves the list of zoom levels to https://lh3.ggpht.com/lZhK5P8xQfJc429-Dm4T4Yn1xzMS6fyBjMhpokVBKeoovKCRtCZ875YvTQrY=g

Whereas dezoomify-rs finds https://lh3.ggpht.com/txSQzJ7Jye8GCQtiMiPiapk4v-jo4cr6BwtSRLEgYCGKgZBMTtk40-gutXI=g

So it seems to be a problem with dezoomify, and it needs more investigation...

lovasoa commented 4 years ago

In the meantime, I uploaded the max resolution to wikimedia: 6th division disembarking at Alexandria after the evacuation of Greece - Ivor Hele - Wikimedia

cygnusthesw44n commented 4 years ago

Thank-you that's great to hear. I appreciate you uploading The max resolution file to wikimedia but it wasn't necessary. You may delete it if you wish. I managed to grab the image using dezoomify-rs.

Thank-you once more.

On Thu, Feb 27, 2020 at 3:44 AM Ophir LOJKINE notifications@github.com wrote:

In the meantime, I uploaded the max resolution to wikimedia https://commons.wikimedia.org/wiki/File:Australian_troops_disembarking_at_Alexandria_after_the_evacuation_of_Greece_-_Ivor_Hele.jpg

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/lovasoa/dezoomify/issues/357?email_source=notifications&email_token=AMM4UM2FAZDUFYE57DUETYLRE6KP5A5CNFSM4K4TDEYKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEND3UUI#issuecomment-591903313, or unsubscribe https://github.com/notifications/unsubscribe-auth/AMM4UM5CZLYO2DIGZQJLCHDRE6KP5ANCNFSM4K4TDEYA .

lovasoa commented 4 years ago

You may delete it if you wish.

Of course I'm not deleting it ! It's already in use on 4 wikipedia pages in two languages and on wikidata ! I uploaded it because wikimedia needs high-quality copyright-free illustrations, not because you in particular need it.

lovasoa commented 4 years ago

I encourage you to upload the images that you download and that are free of copyright to wikimedia too 😃

lovasoa commented 4 years ago

Ok, the bug should be fixed now. The limits mentioned in #296 still apply, but dezoomify shouldn't miss higher zoomlevels as it did.