Increases in X-ray brightness from synchrotron light sources lead to a requirement for higher frame rates from hybrid pixel array detectors (HPADs), while also favoring charge integration over photon counting. However, transfer of the full uncompressed data will begin to constrain detector design, as well as limit the achievable continuous frame rate. Here a data compression scheme that is easy to implement in a HPAD's application-specific integrated circuit (ASIC) is described, and how different degrees of compression affect image quality in ptychography, a commonly employed coherent imaging method, is examined. Using adaptive encoding quantization, it is shown in simulations that one can digitize signals up to 16383 photons per pixel (corresponding to 14 bits of information) using only 8 or 9 bits for data transfer, with negligible effect on the reconstructed image.
Huang, Panpan, Du, Ming, Hammer, Mike, Miceli, Antonino, & Jacobsen, Chris (2020). Fast digital lossy compression for X-ray ptychographic data. Journal of Synchrotron Radiation (Online), 28(1). https://doi.org/10.1107/s1600577520013326
@article{osti_1765463,
author = {Huang, Panpan and Du, Ming and Hammer, Mike and Miceli, Antonino and Jacobsen, Chris},
title = {Fast digital lossy compression for X-ray ptychographic data},
annote = {Increases in X-ray brightness from synchrotron light sources lead to a requirement for higher frame rates from hybrid pixel array detectors (HPADs), while also favoring charge integration over photon counting. However, transfer of the full uncompressed data will begin to constrain detector design, as well as limit the achievable continuous frame rate. Here a data compression scheme that is easy to implement in a HPAD's application-specific integrated circuit (ASIC) is described, and how different degrees of compression affect image quality in ptychography, a commonly employed coherent imaging method, is examined. Using adaptive encoding quantization, it is shown in simulations that one can digitize signals up to 16383 photons per pixel (corresponding to 14 bits of information) using only 8 or 9 bits for data transfer, with negligible effect on the reconstructed image.},
doi = {10.1107/s1600577520013326},
url = {https://www.osti.gov/biblio/1765463},
journal = {Journal of Synchrotron Radiation (Online)},
issn = {ISSN 1600-5775},
number = {1},
volume = {28},
place = {United States},
publisher = {International Union of Crystallography},
year = {2020},
month = {12}}
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 350, Issue 1-2https://doi.org/10.1016/0168-9002(94)91185-1
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 633https://doi.org/10.1016/j.nima.2010.06.107
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 650, Issue 1https://doi.org/10.1016/j.nima.2010.12.005
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 942https://doi.org/10.1016/j.nima.2019.06.065