Fourier transform of image in opencv

We live in the world of time. We get up at 7:00 a.m. for breakfast, go to the subway at 8:00, and start work at 9:00... Taking time as reference is time domain analysis. But in the frequency domain everything is still! High frequency: a grayscale component, such as a boundary, that changes dramatically ...

Posted on Fri, 28 Feb 2020 00:06:53 -0500 by shinyjoy

The algorithm of mask detection based on Artificial Intelligence

Due to the impact of the epidemic, mask detection has become an algorithm developed by various programmers. Baidu's face detection SDK works well, and they also open source the mask detection I use OPENCV based detection here The general idea may be to train the data sets of mobile phones with and witho ...

Posted on Thu, 27 Feb 2020 06:09:05 -0500 by JesuZ

OpenCV image processing algorithm-12 (adaptive correction algorithm of uneven illumination image based on two-dimensional gamma function)

Adaptive correction algorithm of illumination nonuniformity image based on two-dimensional gamma function Preface This is the twelfth article of OpenCV image processing column. Today, I will introduce an image adaptive correction algorithm to solve the problem of uneven illumination. In fact, uneven ...

Posted on Mon, 24 Feb 2020 09:13:44 -0500 by beeman000

Let me show you how to make a music poster in Python

Preface Some time ago, I was inspired by a friend who thought that I could use the music playing page as a poster picture. In fact, there is still a gap between what we will talk about next and posters, and the specific implementation is just simple picture pasting, but the effect is still good. The e ...

Posted on Mon, 24 Feb 2020 01:34:01 -0500 by siric

Entry record of darknet [mysy2 environment + opencv compilation]

There is a lot of rubbish in the records, mainly including: Compiling darknet with mysy2 under Windows To solve the problem of compiling darknet with opencv: opencv4 latest version of Iplimage Simple error reporting represented by clock_lt timeval timesub no definition mysy2 link library dll ...

Posted on Sun, 23 Feb 2020 07:38:45 -0500 by kaimason1

License plate recognition system based on opencv template matching

This paper introduces a license plate recognition system which uses opencv open source library for license plate location, projection method for license plate character segmentation, and template matching method for character recognition. ##1. Use opencv for graphics processing. After finding a vehicle ...

Posted on Fri, 21 Feb 2020 07:29:54 -0500 by Highland3r

Python 3.8.1 common toolkit Download

1. First of all, share with you the origin of this blog: As we all know, the first step of getting started with Python is to download and install python, and download the commonly used toolkit. I couldn't find a way to download numpy toolkit before because of the reason of downloading version. I downloa ...

Posted on Tue, 18 Feb 2020 08:10:56 -0500 by ahundiak

Harris corner detection

Article directory Harris corner detection Corner detection Harris corner detection algorithm Harris API Code Effect Harris corner detection 1. Related concepts of corner detection; 2,API; 3,Code; Corner detection 1. The corner is usually defined as the intersection of two sides. The local ...

Posted on Mon, 17 Feb 2020 05:09:19 -0500 by m@tt

Python OpenCV video operation (DASH cam case)

Based on the modification of pictures OpenCV modify picture You can also use OpenCV to manipulate the video, Video reading is essentially image reading, because video is composed of one frame of image. One second, 24 frames can basically read the video smoothly. Open camera with opencv 1 first, t ...

Posted on Sun, 16 Feb 2020 22:32:37 -0500 by trystan

The first chapter of OpenCV Python development image processing foundation

The first chapter of OpenCV Python development image processing foundation Different color spaces Color is the different feeling of people's eyes for different frequencies of light. Color is not only objective (different frequencies of light) but also subjective, with different understanding. The wo ...

Posted on Sun, 16 Feb 2020 02:10:56 -0500 by djelica