Am Donnerstag, 31. Dezember 2020, 12:05:18 CET schrieb Sonali Warunjikar:
> On Thu, Dec 31, 2020 at 02:15:33PM +0530, Sonali Warunjikar wrote:
> > Now the USB layer is as such over. The challenge now shifts to the format
> > of the data gathered.
>
> Almost there...
>
> The image resolution on Windows is known and the byte array gathered is
> double of widthxheight indicating it's a 16 bit grayscale image and the
> following way to build image using Pillow almost works - as in the shape
> of the x rayed finger is fine.
That sounds terrific.
>
> Image.frombytes('L',(1168,1562),buf,'raw','L;16B',0,1)
>
> Only problem left if I save it back as a raw bitmap (just to see how much
> size a lossless format gives) it is of half the number of bytes gathered
> from which it seems it's not using full 16 bit range. The X ray quality in
> turn is affected.
>
> How to make Pillow consume all 16 bits per pixel is unclear. Whether L;16B
> is right or not I am unsure.
This might be a limitation introduced by Pillow. I admit that I do not fully
understand the
problem but briefly looking up some references I came across
https://www.researchgate.net/publication/
307613633_Comparison_of_the_performance_of_intraoral_X-
ray_sensors_using_objective_image_quality_assessment[1]
and
https://stackoverflow.com/questions/32622658/read-16-bit-png-image-file-using-python[2]
I know that ImageJ is used a lot for Dicom images
maybe this helps.
https://forum.image.sc/t/how-can-i-import-a-raw-image-in-imagej/36435[3]
Other then that it migh be neccessary to decompile the Windows binary to get
some
pointers.
--------
[1] https://www.researchgate.net/publication/
307613633_Comparison_of_the_performance_of_intraoral_X-
ray_sensors_using_objective_image_quality_assessment
[2]
https://stackoverflow.com/questions/32622658/read-16-bit-png-image-file-using-python
[3] https://forum.image.sc/t/how-can-i-import-a-raw-image-in-imagej/36435
