> Who uses WSQ other than NIST? What is it's advantage? (My WSQ knowledge > is only the bare minimum needed to work with NBIS)
WSQ nowadays is industry standard. Not only because of it's excellent compression, but it is also ideal for fingerprint images. From Wikipedia http://en.wikipedia.org/wiki/Wavelet_Scalar_Quantization "This compression method is preferred over standard compression algorithms like JPEG because at the same compression ratios WSQ doesn't present the "blocking artifacts" and loss of fine-scale features that are not acceptable for identification in financial environments and criminal justice." > Probably wouldn't object to JPEG/PNG (assuming code is clean and can be > modularized and excluded at compile time in future) but which use cases > are you envisioning for this? Couldn't agree more... and yes I am. > PGM is ideal because it is the true > representation of images inside the library, and it is trivial to > interpret and render. Also, I do not really expect any "real" users of > the PGM export function, I expect apps to interpret the greyscale > directly and do whatever they want with it. There are easy ways for apps > to convert that to an arbitrary format - for example see how fprint_demo > saves to .png I actually use PGM on a day to day basis to verify that my data is actually OK (since I usually don't see the fingerprint itself). > One concern I'd have is that people would then request more and more > formats. Not sure whether we should be heading this way... I think if we provide just the right formats and their easy to use, it wouldn't be a problem. It's pretty clear that fprint isn't an image lib, and if someone wants more formats, they can just write their own little implementation, or use another software that already does it. I really think that if fprint is to be widely used, it should incorporate enough tools that don't make developers have to look other places for things that are directly related to fingerprint technology.
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