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Programming Articles
Page 2102 of 2547
How to make a grid of images in PyTorch?
The torchvision.utils package provides us with the make_grid() function to create a grid of images. The images should be torch tensors. It accepts 4D mini-batch Tensor of shape (B ☓ C ☓ H ☓ W) or a list of tensor images, all of the same size.Here, B is batch size, C is the number of channels in the image, H and W are the height and width.H ☓ W of all images should be the same.The output of this function is a torch tensor containing a grid of images. We can specify the number of images in a row using ...
Read MoreHow to compute the area of a set of bounding boxes in PyTorch?
The torchvision.io package provides functions to perform different IO operations. To compute the area of a bounding box or a set of bounding boxes, torchvision.io package provides the box_area() function. This function takes the bounding boxes as an input parameter and returns the area of each box.The bounding boxes should be torch Tensors of size [N, 4] where N is the number of bounding boxes for which the area to be calculated. Each bounding box is specified by the coordinate (xmin, ymin, xmax, ymax). In other words − 0 ≤ xmin < xmax, and 0 ≤ ymin < ymax. The ...
Read MoreHow to draw bounding boxes on an image in PyTorch?
The torchvision.utils package provides the draw_bounding_boxes() function to draw bounding boxes on an image. It supports images of type torch Tensor with shape (C x H x W) where C is the number of channels, and W and H are the width and height of the image, respectively.If we read an image using Pillow or OpenCV, then we would have to first convert it to a torch tensor. We can draw one or more bounding boxes on the image. This function returns an image Tensor of dtype uint8 with bounding boxes drawn.The bounding boxes should be torch Tensors of size ...
Read MoreHow to read a JPEG or PNG image in PyTorch?
Reading the images is a very important part in image processing or computer vision related tasks. The torchvision.io package provides functions to perform different IO operations. To read an image, torchvision.io package provides the image_read() function. This function reads JPEG and PNG images. It returns a 3D RGB or Grayscale Tensor.The three dimensions of the tensor correspond to [C, H, W]. C is the number of channels, W and H are the width and height of the image, respectively.For RGB, the number of channels is 3. So, the output of the read image is a tensor of [3, H, W]. The ...
Read MoreNode.js - process.disconnect() Method
When a Node.js process is spawned with an IPC channel, the process.disconnect() method will close that IPC channel to the parent process, allowing the child process to exit or finish gracefully. The process will exit once there are no other connections keeping it alive.Syntaxprocess.disconnect()Example 1Create two files with the names "parent.js" and "child.js" and copy the following code snippets. After creating the file, use the command "node parent.js" to run parent.js.parent.js// process.channel Property Demo Example // Importing the child_process modules const fork = require('child_process').fork; // Attaching the child process file const child_file = 'child.js'; // Spawning/calling child ...
Read MoreNode.js - dnsPromises.resolve6() Method
The dnsPromises.resolve6() method uses the DNS protocol to resolve the IPv6 addresses (AAAA records) for the hostname. The promise is resolved with an array of IPv6 addresses.Syntaxdns.resolve6(hostname, [options])Parametershostname – This parameter takes input for hostname to be resolved.options – It can have the following options −ttl – It defines the Time-To-Live (TTL) for each record.Example 1Create a file with the name "resolve6.js" and copy the following code snippet. After creating the file, use the command "node resolve6.js" to run this code as shown in the example below −// dns.resolve6() Demo Example // Importing the dns module const dns = ...
Read MoreNode.js - dns.resolveMx() Method
The dns.resolveMx() method uses the DNS protocol to resolve mail exchange (MX) records for the hostname. The addresses argument passed to the callback function will contain an array of objects containing both the priority and exchange objects.Syntaxdns.resolveMx(hostname, callback)Parametershostname – This parameter takes input for hostname to be resolved.callback – This function will catch errors, if any.records – Returns Mx records for the hostname.Example 1Create a file with the name "resolveMx.js" and copy the following code snippet. After creating the file, use the command "node resolveMx.js" to run this code as shown in the example below −// dns.resolveMx() Demo Example ...
Read MoreNode.js - process.report.directory Property
The process.report.directory property is used to get or set the directory where the report is written. The default value is the empty string that indicates the reports are written to the current working directory of the Node.js Process.Syntaxprocess.report.directoryExample 1Create a file with the name "directory.js" and copy the following code snippet. After creating the file, use the command "node directory.js" to run this code as shown in the example below −// process.report.directory Property Demo Example // Importing the process module const process = require('process'); // Assigning a directory to store process.report.directory = "/tutorialsPoint" // Printing the result ...
Read MoreNode.js - dnsPromises.resolveMx() Method
The dnsPromises.resolveMx() method uses the DNS protocol to resolve the mail exchange records (MX Records) for the hostname. The promise is resolved with an array of objects containing both a priority and exchange property on success.SyntaxdnsPromises.resolveMx( hostname )where, hostname is the parameter that takes the input for the hostname to be resolved.Example 1Create a file with the name "resolveMx.js" and copy the following code snippet. After creating the file, use the command "node resolveMx.js" to run this code as shown in the example below −// dns.resolveMx() Demo Example // Importing the dns module const dns = require('dns'); const ...
Read MoreNode.js - dns.resolveCname() Method
The dns.resolveCname() method uses the DNS protocol to resolve CNAME records for the hostname. The addresses argument passed to the callback function will contain an array of canonical records in an array.Syntaxdns.resolveCname(hostname, callback)Parametershostname – This parameter takes the input for the hostname to be resolved.callback – This function will catch errors, if any.addresses – Returns CNAME addresses for the hostname.Example 1Create a file with the name "resolveCname.js" and copy the following code snippet. After creating the file, use the command "node resolveCname.js" to run this code as shown in the example below −// dns.resolveCname() Demo Example // Importing the ...
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