Day1 notes of high tech small training (C + +)

preface IDE tools VSCode Syntax detection: include header file + compile built-in syntax Add header file detection: Ctrl + Shift + P - > C + + configuration editing, add the directory where the header file is located; Control terminal command environment variable PATH: echo %PATH% set i ...

Posted on Thu, 25 Jun 2020 04:00:29 -0400 by jaimitoc30

Build barcode scanner with raspberry pie 4, OLED, USB camera

Recently, at 618 discounts, I bought Raspberry Pie 4 to use as a computer for my baby.After that, I played it by myself and made a simple scanner. Raspberry Pie 4 related hardware procurement 4GB version of Raspberry Pie 4.Officially priced at $65, Jingdong 300 is reduced from 40 to 389. Micro HDMI to HDMI cable.Raspberry Pie 4 replaced the po ...

Posted on Wed, 10 Jun 2020 20:57:03 -0400 by evdawg80

View properties of Python objects

https://www.cnblogs.com/klchang/p/7296058.html https://www.cnblogs.com/cenyu/p/5713686.html https://www.cnblogs.com/elie/p/6685413.html   In Python, when some libraries are used, the documents found on the network are not complete, so it is necessary to check whether the corresponding Python objects contain the required functions or constan ...

Posted on Fri, 29 May 2020 05:59:59 -0400 by angelorigo

OpenCV Development Notes: red fat man 8 minutes to take you to understand the moment of the image (illustrated + easy to understand + program source code)

If the article is original, it cannot be reproduced without permission Original blog address: https://blog.csdn.net/qq21497936 Original blogger blog navigation: https://blog.csdn.net/qq21497936/article/details/102478062 Blog address: https://blog.csdn.net/qq21497936/article/details/106257036 Dear readers, knowledge is infinite and manpower i ...

Posted on Thu, 21 May 2020 11:01:25 -0400 by njdirt

opencv-12-gaussian filter-bilateral filter (with C + + code implementation)

Before you start In recent days, I haven't written for my own reasons. One is that I'm lazy. The other is that I don't want to write down some problems I have encountered here. Let's try to finish this chapter first. Before that, I introduced the more commonly used and well understood mean and median filtering. However, in the routine Smoothing ...

Posted on Sun, 10 May 2020 05:52:58 -0400 by stunna671

Vertical projection of opencv

Cut on vertical projection First of all, I choose the license plate number as the projection image, which can be used as the license plate cutting technology. Principle: after the license plate is processed, all the pixel values are stored in an array, and then the pixel values of each column are traversed and accumul ...

Posted on Sun, 03 May 2020 01:47:54 -0400 by haku87

SVM classifier practice to detect whether there is basketball

For the principle of svm In the previous chapter, we have a basic understanding, which is mainly realized by the relevant algorithm provided by OPencv. To fully understand the needs of SVM, we need to continue to spend time and energy. Here's how to use SVM classifier for object recognition. This time, take identifying basketball as an example ...

Posted on Sat, 02 May 2020 08:28:30 -0400 by Zaxnyd

Histogram Calculation

histogram Histogram is a set of statistics of data, and the statistical results are distributed in a series of predefined bins. The data here refers not only to the gray value, but also to any feature that can effectively describe the image. Let's take an example. Suppose a matrix contains the information of an image (gray value ...

Posted on Thu, 23 Apr 2020 10:29:06 -0400 by everurssantosh

Image retrieval: small image database retrieval based on OpenCV

In this paper, the previous several articles are summarized to realize a small image retrieval application. A small image retrieval application can be divided into two parts: train to build the feature database of image set. Retrieve, retrieve, given image, return the most similar image from the image library The process of building imag ...

Posted on Mon, 20 Apr 2020 01:58:35 -0400 by Paul1893

Python plays all kinds of multimedia, video, audio to pictures

Python plays all kinds of multimedia, video, audio to pictures We often encounter some operations to modify multimedia files, such as video editing, subtitle editing, audio separation, video audio mixed streaming, etc. Another example is the operation of audio files: audio clip, audio format conversion. Another example is our most commonly u ...

Posted on Fri, 10 Apr 2020 03:02:31 -0400 by Cheeseweasel