Hello again,

Thanks to Mike, I knew this was likely something to do with our JP2 library; I'm now pretty sure I've traced it back to a hard-coded frombuffer() setting--"L", for grayscale--in the NativeImaging module that Chronam uses to optimize image generation/broker image libraries.  I'm wary of the consequences of changing that, and will be investigating further.


Thanks, everyone--


From: Data, API, website, and code of the Chronicling America website [[log in to unmask]] on behalf of Michael Beccaria [[log in to unmask]]
Sent: Tuesday, June 23, 2015 9:52 AM
To: [log in to unmask]
Subject: Re: Color Images in Chronam?


I used color images in a local chronam instance and they seemed to work out and display properly. You can see here where all of our yearbook covers were scanned in color.


We used png images. Iím not sure what might be causing this on your end.


Mike Beccaria

Systems Librarian

Director of Information Technology

Paul Smithís College

7833 New York 30
Paul Smiths, NY 12970


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From: Data, API, website, and code of the Chronicling America website [mailto:[log in to unmask]] On Behalf Of Williams, Stephanie
Sent: Tuesday, June 23, 2015 9:11 AM
To: [log in to unmask]
Subject: Color Images in Chronam?



I know I've asked this before, but I just spent another chunk of time trying to find an answer and figured it might be worth another shot.

I can't figure out what's causing images (thumbnails, zooming viewer image tiles) to always appear as grayscale--even if the loaded original (JP2 or TIFF) is in color.  I've combed through the code for anything that I think would produce grayscale and I'm coming up empty. I know I'm missing something--downloading a page image from the interface returns the full-color version.

Any insight would be greatly appreciated--we're trying to use the Chronam software for post-1923 papers and it seems like a shame to lose the color if we have it.




Stephanie Williams

Digital Projects Programmer

[log in to unmask] | 919-962-4836

North Carolina Digital Heritage Center | | @ncdhc