Tag：wave filter

Fourier transform in convolutional neural network: 1024×1024 Fourier convolution
Convolutional neural network (CNN) has been widely used and proved to be very successful. However, the calculation of convolution is very inefficient. The sliding window requires a lot of calculation and limits the size of the filter. Usually, small nuclei between [3,3] and [7,7] limit the receptive field (the recent large kernel convolution can refer […]

Least mean squares regression (II)
See this article for general LMS algorithm applications. General LMS practical application This paper designs the mathematical theory behind LMS. 1. The Least Mean Squares algorithm (LMS) SDThe steepest descent method studied is a recursive calculationSignal statistics are knownRecursive algorithm of time Wiener filter (knowledge about R och P). The problem is that this information […]

Graph neural network Chapter 5 graph signal processing and graph convolution neural network reading notes
A few words before: Finally! Here comes the most relevant content of GNN! The first four chapters are all preliminary knowledge, or introductory knowledge. In fact, they are not particularly related to GNN. But from the beginning of this chapter, it is the core of GNN: graph signal processing. This part is actually very critical, […]

19000 star! Is it safe to play mosaic? This “one second restore” tool to understand
[introduction]: depix is a tool for restoring numbers and letters from pixelated pictures. brief introduction Depix is a python tool for restoring numbers and letters from pixelated images. In short, it is to restore the original content from mosaics. At present, it has some limitations and is only applicable to pixelated images created by linear […]

Reading papers on fairness of recommendation system (2)
Next, I spent a day reading the paper learning fair representations for recommendation: a graph based perspective[1], the structure and core ideas of the paper are combed in detail, and then the paper is prepared to be reproduced using the pytoch framework. Innovation of the paper There are two main points in this paper. One […]

Implementation of moving average filter in hand to hand teaching series
[guide]: the previous article about IIR design, or some friends click to read. Although I don’t know how the viewers feel, but I think there is always a favor to read, so I decided to continue this series. This article talks about the average filter, this topic at first glance is very easy. However, some […]

Design of IIR filter for hand to hand teaching series
[guide]: in embedded system, it is often necessary to collect analog signals. It is inevitable to introduce interference into the signal chain of collecting analog signals. So how to filter out the interference? Today, let’s describe step by step how to design and deploy an IIR filter to your system. What is IIR filter? Infinite […]

Design of comb filter series
[guide]: the previous article on the design of IIR / moving average filter. In this paper, we will talk about notch filter, which is very useful in mixing harmonic interference. The algorithm is simple and the implementation cost is low. This paper discusses its mechanism and application scenarios. Note: try to write a summary of […]

Design of FIR filter for hand to hand teaching series
[guide]: the previous article introduces the moving average filter, IIR filter and comb filter. Today, we will talk about the design and implementation of FIR filter. In this paper, we still use 4w1h to describeWhat Why Where When HowSeveral dimensions are expanded. For easy understanding of 4w1h, the figure of 5W1H is still attached. What […]