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There are three channels in an RGB image- red, green and blue. The color space where red, green and blue channels represent images is called RGB color space. In OpenCV, BGR sequence is used instead of RGB. This means the first channel is blue, the second channel is green, and the third channel is red. To split an RGB image into different channels, we need to define a matrix of 3 channels. We use 'Mat different_Channels[3]' to define a three-channel matrix.Next, we split the loaded image using OpenCV 'split()' function. The format of this function is 'split(Source Matrix, Destination Matrix)'. This function ... Read More
In this topic, we will understand how to find out the number of channels of an image. After running the program, the number of the channel will be shown in the console window.To get the number of the channel, we have used a class of OpenCV named 'channels()'. When we pass the image matrix as an object of the class 'channels()', it gives the channel an integer value.The following program counts the number of the channels and show it in the console window.Example#include #include using namespace std; using namespace cv; int main(int argc, char** argv) { Mat image_load;//Declaring a ... Read More
An array is a convenient method to store and retrieve the collection of data. In OpenCV, we can use this concept to load multiple images in an image array and show them using the array's index number.The following program loads multiple images in a matrix array and shows the array's images called by the index number.Example#include #include using namespace cv; using namespace std; int main(int argc, const char** argv) { Mat myImage_array[3];//declaring a matrix named myImage// namedWindow("PhotoFrame1");//declaring the window to show the image// namedWindow("PhotoFrame2");//declaring the window to show the image// namedWindow("PhotoFrame3");//declaring the window to show the ... Read More
In this topic, we will determine how to load and show images using OpenCV in C++. There are the following functions required for loading and showing an image in OpenCV. Mat: Mat is not a function. It is a data structure, a type of variable. Like int, char, string variable types in C++, Mat is a variable of OpenCV, which creates a matrix data structure to load images inside it. In this program, we wrote 'Mat myImage;'. That means we are declaring a matrix variable named 'myImage'. namedWindow(): It allocates some memory and creates a window to show the image. It works like a ... Read More
There are three steps to install OpenCV, which are as follows −Downloading all required software and install them.Processing OpenCV for Visual Studio.Linking OpenCV with Visual Studio.Let us define these steps one by one.Step 1 - Downloading and Installing the required SoftwareWe will use OpenCV in Microsoft Visual Studio. So we must have to download Visual Studio and OpenCV.Visual StudioOpenCVCMakeLet us learn how to install this software first.Installing Visual StudioThe first step is to download the Visual Studio on your system from its official website or follow link https://visualstudio.microsoft.com/downloads/.Then click on the download button for downloading the Visual Studio. After installing ... Read More
OpenCV stands for open-source computer vision. It was generated to support a common infrastructure for computer vision operations and use system behaviour in financial products. It generally targets image processing, faces recognition, video capture, searching, and object disclosure.OpenCV is created to implement various operations including recognising and detecting faces, analysing human tasks in videos, identifying objects, recording camera movements, tracking moving objects, and combining images to create a high-resolution image for the accurate scene. Let's see the topic defining the term "Computer Vision."Computer VisionComputer vision is a flexible scientific area that manages to regenerate, preventing, and learn a 3D image from ... Read More
Let us understand when MySQL compressed protocol should be used −The compression operation is used only if both client and server support ‘zlib’ compression, and the client requests compression.The advantage of using compression is that it reduces the size of the payload.On the other hand, the disadvantage of using compression is that it increases the computation time.Performance benefits will depend largely on the size of the result set which is being sent.In addition to this, the network bandwidth and latency between the database server and its clients also matters.The larger the result set, the larger will be the latency.In other ... Read More
MySQL will make secure connections easier when it has streamlined key generation for both MySQL Community and MySQL Enterprise. This way, the security is improved by expanding support for TLSv1.1 and TLSv1.2. This also helps administrators determine if clients are connecting securely or not with enhanced visibility into connection types.Extending this importance on secure connections, MySQL server introduced a new server-side configuration option that allows MySQL administrators to restrict connections to clients who use secure transport. When we say about the connection needing secure transport, the first question that needs to be addressed is the kind of transport it uses.Secure ... Read More
Programs such as ‘mysql’ and ‘mysqldump’, that use MySQL client library have the support of MySQL connection to server with the help of many transport protocols, such as TCP/IP, Unix socket file, named pipe, shared memory, and so on.With respect to a given connection, if the transport protocol is not specified, it is determined as a separate task.ExampleConnections to localhost will result in a socket file connection on Unix and Unix-like systems, and a TCP/IP connection to 127.0.0.1 otherwise. If the protocol has to be specified in particular, it is done using the --protocol command option.The below table shows the ... Read More
Programs such as ‘mysql’ and ‘mysqldump’, that use MySQL client library have the support of MySQL connection to server with the help of many transport protocols, such as TCP/IP, Unix socket file, named pipe, shared memory, and so on. Let us understand the connection transport protocols used with MySQL −The below table shows the values permitted for --protocol and also tells the platforms where each of these values are applicable. It is to be noted that the values are not case-sensitive.--protocol valueTransport protocol usedApplicable platformsTCPTCP/IPAllSOCKETUnix socket fileUnix and Unix-like systemsPIPENamed pipeWindowsMEMORYShared memoryWindowsTCP/IPTCP/IP transport supports connections to local or remote MySQL ... Read More