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Fourier transform, also known as Fourier transform, means that a function satisfying certain conditions can be expressed as a trigonometric function (sine and / or cosine function) or a linear combination of their integrals. This paper will introduce how to realize the Fourier transform of image through OpenCV. You can refer to what you need c ...

The complete sample code and files of this article have been uploaded to my Github warehouse https://github.com/CNFeffery/PythonPracticalSkills This is the fourth issue of my series "Python practical secrets". This series is based on the author's experience in using Python in his daily work. Each issue brings you a simple skill that ...

In daily performance testing, traffic playback is a very excellent way. It can not only quickly build test cases and be infinitely close to the preset scenarios, but also greatly reduce the test threshold and save time and cost with the help of many excellent playback frameworks such as goreplay. This method is very suitable for rapid performan ...

Style and color show youth [¶] The fifth chapter introduces the use of styles and colors in matplotlib in detail. Drawing styles and colors are important means to enrich visual charts. Therefore, mastering this chapter can make visual charts more beautiful, highlight key points and highlight artistry. There are three common methods for dr ...

Series articles Python learning 01 - Fundamentals of Python Python third party Library -- urllib learning Python learning 02 - Python crawler Python third party Library -- urllib learning The urllib library is mainly used to manipulate web page URL s and crawl web page contents. It is usually used by crawlers in Python. Some functions ...

10. Definition, call, parameter transfer and application of [Python Programming] function Note: this tutorial mainly uses Python 3 6 programming on jupyter notebook. Python environment configuration reference [Python learning] start your Anaconda installation and python environment management with windows 10 perhaps [Python learning] start ...

Due to an introductory course in Python next semester So I've been groping for myself during the winter vacation. After all, I can't drop out at that time. It's also a water credit On a whim recently, I plan to try climbing Baidu translation After a day's work, the liver finally came out Don't talk too much and start it directly (the environmen ...

Objective: to complete the Titanic survival prediction based on the Titanic data set. import pandas as pd import numpy as np import matplotlib.pyplot as plt import seaborn as sns from IPython.display import Image plt.rcParams['font.sans-serif'] = ['SimHei'] # Used to display Chinese labels normally plt.rcParams['axes.unicode_minus'] = False ...

This article aims to record some grammars frequently used by the author in his daily use of Python, which are constantly updated. Some of them refer to some references from Zhihu, CSDN and other channels. If there are any similarities, please forgive me and communicate with the author in private. 1. String (str) 1.1. add to 1. Direct add ...

preface This chapter is the third Assignment of Introduction to Data Science in Python. The main task of this chapter is to select the appropriate method of summarizing and merging data tables based on the three tables given and on the understanding of various merging processes, that is, row data summary, clean and merge the data, and cl ...