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preface: This column mainly combines OpenCV4 to realize some basic image processing operations, classical machine learning algorithms (such as K-Means, KNN, SVM, decision tree, Bayesian classifier, etc.), and common deep learning algorithms. Series of articles, continuously updated: OpenCV4 machine learning (I): Construction and configuratio ...

Contour detection refers to the detection of object boundaries in an image, more focused on the upper semantic objects.For example, the findContours() function in OpenCV gets each contour and stores it as a point vector. In addition, it gets the topological information of an image, that is, the index number of the last contour, the previo ...

Catalog Preface 1. Brightness and Contrast 1. What is brightness and contrast 2. Brightness and Contrast Adjustment Principle 3. Brightness and Contrast Adjustment Code Implementation 4,API-convertScaleAbs 2. Gamma Correction 1. Introduction of Gamma Correction 2. Gamma Correction Principle ...

JniOpencv environment configuration I. preparation of development package 2. Preparation Library Three configuration CPU platform architecture types A small Demo to enhance image brightness JniOpencv environment configuration 1, Prepare development package Copy opencv Android SDK - > SDK - > nati ...

Environment installation: 1. The source code of zxing CPP and the lib generated after the source code compilation. My version is V1.0.8. The compilation method is as follows: https://www.cnblogs.com/zhenjin-huaxiazongdai/p/12545959.html . Zxing CPP project path: https://github.com/nu-book/zxing-cpp 2. Visual Studio 2017 installation https://vi ...

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Basic application of Opencv Article directory 1. Line drawing 2. Rectangle drawing 3. Ellipse and sector drawing 4. Draw a circle 5. Drawing of arbitrary shapes 1. Line drawing Method cv2.line(img, pt1, pt2, color, thickness, lineType, shift ) Parameters: 1. img: image; 2. pt1: the first point ...

qt +opencv dnn+tensorflow to realize on duty early warning In the process of security, have you ever had such experience? When someone enters the sensitive area, they do not find out in time. Today, qt +opencv dnn+tensorflow is used to realize the early warning of sensitive areas The following picture: ...

Requirement Combine the following two pictures to produce panoramic mosaic effect. Code implementation process 1. Import required libraries import numpy as np import cv2 2. Create a class Stitcher The Stitcher class contains five methods, which are stitch(self, images, ratio=0.75, reprojThresh ...

Requirements: In image processing, sometimes due to the inconsistent angle of the photo taken, the resulting image has a certain degree of offset and needs to be corrected, such as the following two pictures. Figure 1 Figure 2 For example, Fig. 1, what should I do if I want to correct the lab ...