National Library of Wales

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

674 stars 75 forks source link

National Library of Wales #3

Closed emyrmorgan closed 9 years ago

emyrmorgan commented 9 years ago

Hi,

I've used your program in the past and I think that it is really great. I've tried to download an image from the National Library of Wales website but everything that I've tried before doesn't work. Am I being stupid or is there an issue with the file that is unsupported? The file is found here in Firebug console: value="zoomifyImagePath=delweddau/jws/jws00042.pff&zoomifyServerIP=www.llgc.org.uk&zoomifyServerPort=80&zoomifyTileHandlerPath=/zoomify/ZoomifyServlet&zoomifyInitialRotation=0" Many thanks for your help, Emyr

lovasoa commented 9 years ago

Can you give a valid url to a page conatining a zoomify viewer ?

emyrmorgan commented 9 years ago

http://www.llgc.org.uk/drychdigidol/jws/JWS00001/37/zoom.html?lng=en

Thanks for your help, Emyr

lovasoa commented 9 years ago

Ok, the format used here seems a bit more complex than what is used normally in zoomify, and I didn't found any documentation about it, making it difficult to create a dezoomifier.

From what I understand: Instead of using one file per tile, they use only one file that contains all the data. That file is available on the server: http://www.llgc.org.uk/zoomify/delweddau/jws/jws00042.pff But the viewer doesn't download it.

More exactly, it downloads parts of it, through API calls.

Seems to give the metadata: http://www.llgc.org.uk/zoomify/ZoomifyServlet?&requestType=1&file=delweddau%2Fjws%2Fjws00042.pff
Gives the indexes to use in the last API call: http://www.llgc.org.uk/zoomify/ZoomifyServlet?begin=17402&requestType=2&end=19450&file=delweddau%2Fjws%2Fjws00042%2Epff
Return a slice of the pff file, with a header at the beginning. If the parameters are correct, the slice forms a valid JPEG file: http://www.llgc.org.uk/zoomify/ZoomifyServlet?file=delweddau/jws/jws00042.pff&requestType=0&begin=1622936&end=1628538&vers=106&head=16342

lovasoa commented 9 years ago

I think I now mostly understand how the format works, and I started to document it here: https://github.com/lovasoa/dezoomify/wiki/PFF-format-description

Implementing it in dezoomify might actually not be too hard. I'll do it if I have time.

lovasoa commented 9 years ago

I almost finished documenting the format. Everything needed to create a plugin is there, so if anyone is interested and has more time than me...

It must be a matter of hours.

lovasoa commented 9 years ago

Done ! It's in production here: http://ophir.alwaysdata.net/dezoomify/dezoomify.html

It's totally different from the traditionnal zoomify format, so I created a new plugin: "Zoomify PFF".

emyrmorgan commented 9 years ago

Awesome!

Sorry not to have replied sooner - only now I am sitting down after getting chores done and children to bed.

I am in awe! I don't know how you worked all that out but I am really, really impressed by your work.

Merci beaucoup, mon ami.

Is there anything that I can do for you in return?

Leave a review also?

Thanks a merci again,

Emyr

On 13 March 2015 at 20:27, Ophir LOJKINE notifications@github.com wrote:

Done ! It's in production here: http://ophir.alwaysdata.net/dezoomify/dezoomify.html

It's totally different from the traditionnal zoomify format, so I created a new plugin: "Zoomify PFF".

— Reply to this email directly or view it on GitHub https://github.com/lovasoa/dezoomify/issues/3#issuecomment-79350224.

lovasoa commented 9 years ago

You are very welcome! Thank you for opening this bug. The only way you can thank me is by continuing to use this, and other open-source softwares.

I just wrote a small utility in C that converts PFF files to JPEG: pff-extract. If you have many files, or large files to convert, you might want to use it instead of dezoomify, it is faster.

emyrmorgan commented 9 years ago

Thanks so much for your hard work in solving this problem. I probably won't be able to use the utility, pff-extract, which you wrote as I don't have the technical ability and have no real programming experience. However I will be able to use the extractor, which is awesome, as is your skills!

Merci beaucoup,

Emyr Morgan.

On 14 March 2015 at 16:47, Ophir LOJKINE notifications@github.com wrote:

You are very welcome! Thank you for opening this bug. The only way you can thank me is by continuing to use this, and other open-source softwares.

I just wrote a small utility in C that converts PFF files to JPEG: pff-extract https://github.com/lovasoa/pff-extract. If you have many files, or large files to convert, you might want to use it instead of dezoomify, it is faster.

— Reply to this email directly or view it on GitHub https://github.com/lovasoa/dezoomify/issues/3#issuecomment-80572375.