Programming Articles - Page 386 of 3363

Identifying colors in images is a task commonly performed in computer vision and image processing. It has a wide range of applications such as object detection, image segmentation, and image retrieval. In this article, we will see how to determine colors in an image using Python and OpenCV. Open CV is a popular computer vision library written in C/C++ with bindings for Python, OpenCV provides easy ways of manipulating color spaces. Open CV is open source and gives various algorithms useful in image processing. Before identifying colors in an image let us learn about some common image representation methods. ... Read More

Color spaces are different types of color modes, used in image processing and signals and system for various purposes. Open CV is a popular computer vision library written in C/C++ with bindings for Python, OpenCV provides easy ways of manipulating color spaces. Open CV is open source and gives various algorithms useful in image processing. In computer vision, colors are represented using color spaces. There are so many color spaces that are currently used in computer vision and image processing, each having its own unique characteristics and advantages. Some of the very common color spaces in image processing are ... Read More

Tkinter is a Python binding to the Tk GUI toolkit. It is the standard Python interface to the Tk GUI toolkit, and is Python's standard GUI. Tkinter is included with standard Linux, Microsoft Windows and macOS installations of Python. We can create many widgets from python’s tkinter module. One of those multiple widgets is Combobox which is a very widely used powerful tool that can be customized to create lists that allow users to select one or more options from a list of given options. The Combobox widget combines a text input with a drop-down list, allowing the user ... Read More

Python is a powerful programming language that provides many tools and libraries for different applications. We can also create a command line file downloader in python. Command line downloader is used to download files from internet manually through command line interface or your terminal without using browser. To create a command line file downloader in python we need two libraries, they are argparse and required. We should have basic knowledge of terminal or command line interface and python language before we start building this application. Installation Before we continue, we need to have the above mentioned libraries in our ... Read More

We might have to draw lines on an image for various purposes like drawing, scribbling, tracking the movements of a point etc. so it is necessary to know how to connect 2 points in image processing. OpenCV is a library of programming functions primarily for real-time computer vision. The library is cross-platform and licensed as free and open source software under the Apache License. In this article, we will learn how we can connect a new point to the previous point on an image with a straight line using OpenCV-Python. Connecting a Points on with the Previous One ... Read More

OpenCV is a library of programming functions primarily for real-time computer vision. The library is cross-platform and licensed as free and open source software under the Apache License. It is written in C++ and has Python bindings that make it easy to use in Python applications. In this article we are going to learn how to Convert BGR and RGB with python and OpenCV. Before proceeding further first of all let us understand BGR and RGB. What are BGR and RGB RGB and BGR are both color models used to represent colors in digital images. However, the main difference between ... Read More

Python is a powerful programming language that has various applications in the world of software engineering and is very widely used. We can create various types of applications using Python. We can also make a CLI script in Python which can be used to automate many tasks. We can also then package the CLI scipt. For these scripts to be used by other we need to package and distribute these applications. So we must know how we can package a command line python script. This article will guide you through all the steps needed to package a python script and ... Read More

Python is a very popular and powerful programming language which is used to create a large number of applications with different purpose. A command line interface script or CLI script is a script that performs a specific task which is scripted, when it is executed through command line and it is used to automate so many tasks. A CLI script is very useful for developers. We can also create these CLI scripts in python. After creating a CLI script we can also package it and share it with other programmers to use. Therefore, we must know how to package ... Read More

In Haskell, we will convert double type variables into string by using user-defined function, doubleToString along with show function and Text.Printf and Data.Text module. In the first example, we are going to use ( let valueString = show input) and in the second example, we are going to use (doubleToString d = printf "%.2f" d). And in the third example, we are going to use (doubleToString d = unpack $ pack $ show d). Algorithm Step 1 − The program execution will be started from main function. The main() function has whole control of the program. It ... Read More

In Haskell, we will convert string type variables into double by using user-defined function, stringToDouble along with read annotation, readMaybe and double functions. In the first example, we are going to use ( let value = read input :: Double) and in the second example, we are going to use (stringToDouble s = readMaybe s). And in the third example, we are going to use (stringToDouble s = case double $ pack s of). Algorithm Step 1 − The program execution will be started from main function. The main() function has whole control of the program. It ... Read More