Adjusting the brightness and contrast of an image with opencv4.3.0 Tutorial

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 ...

Posted by master82 on Thu, 11 Jun 2020 02:58:03 +0200

AS Cmake OpenCV Foundation

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 ...

Posted by robin on Sat, 02 May 2020 06:45:50 +0200

opencv calls Nu book / zxing CPP to identify QR code

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 ...

Posted by AnarchistX on Thu, 26 Mar 2020 05:15:22 +0100

Wu university students use Python to knock out Cherry Blossom open (with source code)

Yunqi information:[ Click to see more industry information]Here you can find the first-hand cloud information of different industries. What are you waiting for? Come on! This year's Wuhan University is not as crowded as before, but the beautiful cherry blossom is still blooming alone in spring Wuda has opened a live broadcast of Cherry Blossom ...

Posted by vidhatanand on Wed, 25 Mar 2020 10:32:13 +0100

Opencv drawing basic graphics

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 ...

Posted by mrinfin1ty on Thu, 27 Feb 2020 06:30:29 +0100

qt +opencv dnn+tensorflow for early warning of sensitive areas

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: ...

Posted by pahunrepublic on Wed, 05 Feb 2020 15:43:54 +0100

Panoramic mosaic of Opencv

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 ...

Posted by Nirvana on Sat, 18 Jan 2020 07:46:50 +0100

openCV4 Image Correction Implementation Scheme

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 ...

Posted by snog on Thu, 16 Jan 2020 02:45:38 +0100

Download and use of cifar dataset

git https://github.com/tensorflow/models Download the cifar10 file and put it in the project path Project structure   download from cifar10 import maybe_download_and_extract maybe_download_and_extract()   Default download path   Read display manually import numpy as np import pylab filename = '/tmp/cifar10_data/cifar-1 ...

Posted by Sonu Kapoor on Tue, 07 Jan 2020 02:13:21 +0100

Computer vision opcencv tool deep learning fast practice 1 face recognition

Using the pre trained deep learning face detector model provided by OpenCV, face recognition can be carried out quickly and accurately. In August 2017, OpenCV 3.3 was officially released, bringing a highly improved "DNN deep neural networks" module. The module supports many deep learning frameworks, including Caffe, Tenso ...

Posted by lakshmiyb on Sat, 07 Dec 2019 12:22:21 +0100