[sane-devel] Sane backend for an intraoral X ray camera

[Mayuresh]

On Sun, Dec 13, 2020 at 07:23:46PM +0530, Mayuresh wrote:
> I am trying to get sane work with a digital X ray device used for
> dentistry described here [1] on Linux (Ubuntu 20.04) or on NetBSD 9.1.

With the help of usbmon (untruncated version courtesy [1]) and pyusb I
managed to get the camera to work and return a byte array to me. [It's
complicated as the device that actually returns the data is hidden and
gets unlocked only after following certain sequence of interactions with
the device that at first appears. But that's a matter of detail.]

Using PIL python APIs I am also able to convert the raw byte array into an
image, though there is just one glitch. The raw data is a 16 bit grayscale
image, which converts fine, but when showing / saving it's treated like an
8 bit image. I read on some thread that this is indeed a limitation of the
pillow (PIL) package.

This scenario of converting raw data to an image must be very common in
sane. Wonder if I could get some suggestions. If a python package (other
than PIL for above issue) can do it, it will be better as the driver
itself is in python. But even other alternatives will do


[1] https://github.com/swetland/usbmon