User:Fæ/dezoomify
In the last couple of years I've had a few people puzzled and sending me questions, about how to get the right information to unzoom a file which has been "hidden" behind a zoomify web page. Often the Dezoomify open source tool will just work with the URL you give it. However sometimes galleries or archives have used custom web pages which obscure the information, so the standard tool fails. To solve this you need to locate the image information file which the gallery page may pull in and then push out to its own tile painting program.
The steps below use Chrome due its good inspector tools, though something similar can be done within Firefox. Sometimes the file wanted is not a "dzi" file but something like "info.json" or "info.xml", the Ophir tool will accept these cases. For Ophir's own guide read their FAQ.
1 Open a Chrome browser and go to the gallery page with a thumbnail of the image you want to unzoom.
2 Select the Inspect option from the menu to open up the inspection sub-window.
3 In the Inspection sub-window, go to the Network tab by clicking on it.
4 For the first time, zoom the image by clicking on the thumbnail version. If necessary re-fresh the page, the Inspector window should stay open.
5 As the image loads up its tiles, you will see the Network tab fill up with various files being accessed.
6 You can now filter the list of files by typing "dzi" into the filter bar area. See the pink circled text entry area in the image. This will instantly filter the list so that only files with "dzi" in the name are left. This is a Deep Zoom instruction file, telling zooming tools how to find image tiles.
7 Copy the full link address for the dzi file by right-clicking on it and selecting the correct type of copy function.
8 Paste the link into Ophir's dezoomify tool, http://ophir.alwaysdata.net/dezoomify/, and click to unzoom. Chrome may have a problem with allowing a right-click download-image action, if that fails on your version of the browser, just use a different browser, like Firefox, to run Dezoomify in.
The outcome is a large PNG file which you will need to rename. It is recommended that you do not convert this to a jpeg before uploading to Commons, as this will always lose quality of the image. The version of Chrome I'm using to take these images is "55". You should probably consider this guide to be suspect if not updated for more than 2 years.
