The article presents a method for estimating the level of discrete white noise in an image, based on use linear difference operators with vector mask. Two variants new are proposed, which differ accuracy obtained estimates and computational complexity. first version can be attributed to class block methods, whereas second one is intended rapid image analysis processing small number rows or colu...

As quantum computers approach the fault-tolerance threshold, diagnosing and characterizing noise on large-scale devices is increasingly important. One of most important classes channels class Pauli channels, for reasons both theoretical tractability experimental relevance. Here we present a practical algorithm estimating s nonzero error rates in an s-sparse, n-qubit channel, or more generally l...

the method expressed by salem and ravat. (2003) for depth estimation of magnetic sources is used on gravity anomalies for the first time. the depth of some rectangular prisms as synthetic models are estimated through the method. the gravity effect of these models is also considered with a relatively high value of random noise. a field example is also included and the depth of the main anomaly h...