The potential for Bayesian compressive sensing to significantly reduce electron dose in high-resolution STEM images

The use of high-resolution imaging methods in scanning transmission electron microscopy (STEM) is limited in many cases by the sensitivity of the sample to the beam and the onset of electron beam damage (for example, in the study of organic systems, in tomography and during in situ experiments). To demonstrate that alternative strategies for image acquisition can help alleviate this beam damage issue, here we apply compressive sensing via Bayesian dictionary learning to high-resolution STEM images. These computational algorithms have been applied to a set of images with a reduced number of sampled pixels in the image. For a reduction in the number of pixels down to 5% of the original image, the algorithms can recover the original image from the reduced data set. We show that this approach is valid for both atomic-resolution images and nanometer-resolution studies, such as those that might be used in tomography datasets, by applying the method to images of strontium titanate and zeolites. As STEM images are acquired pixel by pixel while the beam is scanned over the surface of the sample, these post-acquisition manipulations of the images can, in principle, be directly implemented as a low-dose acquisition method with no change in the electron optics or the alignment of the microscope itself.


  1. Finally, we take a look at|have a look at} how simple this was and what our first test object will seem like.. It was consistently enjoyable in our test the VEVOR CNC 3018 Build Pro. Even if we generally needed to leaf by way of more than we needed, however perhaps that was additionally outcome of} our left arms. Nevertheless, everybody ought to get this laser engraving machine arrange in brief time|a short Plus Size Stockings while}., even without knowledge of English. In the top, we have a solid, steady laser engraving machine in your arms.


Post a Comment